MVEL (mvel 2.1.9-MULE-020 API)

java.lang.Object
- org.mule.mvel2.MVEL

```
public class MVEL
extends Object
```
The MVEL convienence class is a collection of static methods that provides a set of easy integration points for MVEL. The vast majority of MVEL's core functionality can be directly accessed through methods in this class.

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`CODENAME`
`static boolean`	`COMPILER_OPT_ALLOCATE_TYPE_LITERALS_TO_SHARED_SYMBOL_TABLE`
`static boolean`	`COMPILER_OPT_ALLOW_NAKED_METH_CALL`
`static boolean`	`COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING`
`static boolean`	`COMPILER_OPT_ALLOW_RESOLVE_INNERCLASSES_WITH_DOTNOTATION`
`static boolean`	`COMPILER_OPT_PROPERTY_ACCESS_DOESNT_FAIL`
`static boolean`	`COMPILER_OPT_SUPPORT_JAVA_STYLE_CLASS_LITERALS`
`static boolean`	`INVOKED_METHOD_EXCEPTIONS_BUBBLE`
`static String`	`NAME`
`static String`	`VERSION`
`static String`	`VERSION_SUB`

Method Summary

Methods
Modifier and Type	Method and Description
`static void`	`analysisCompile(char[] expression, ParserContext ctx)` Performs an analysis compileShared, which will populate the ParserContext with type, input and variable information, but will not produce a payload.
`static void`	`analysisCompile(String expression, ParserContext ctx)`
`static Class`	`analyze(char[] expression, ParserContext ctx)`
`static Class`	`analyze(String expression, ParserContext ctx)`
`static Serializable`	`compileExpression(char[] expression)`
`static Serializable`	`compileExpression(char[] expression, int start, int offset, ParserContext ctx)`
`static Serializable`	`compileExpression(char[] expression, Map<String,Object> imports)`
`static Serializable`	`compileExpression(char[] expression, Map<String,Object> imports, Map<String,Interceptor> interceptors)`
`static Serializable`	`compileExpression(char[] expression, Map<String,Object> imports, Map<String,Interceptor> interceptors, String sourceName)` Compiles an expression and returns a Serializable object containing the compiled expression.
`static Serializable`	`compileExpression(char[] expression, ParserContext ctx)`
`static Serializable`	`compileExpression(String expression)` Compiles an expression and returns a Serializable object containing the compiled expression.
`static Serializable`	`compileExpression(String expression, Map<String,Object> imports)` Compiles an expression and returns a Serializable object containing the compiled expression.
`static Serializable`	`compileExpression(String expression, Map<String,Object> imports, Map<String,Interceptor> interceptors)` Compiles an expression and returns a Serializable object containing the compiled expression.
`static Serializable`	`compileExpression(String expression, Map<String,Object> imports, Map<String,Interceptor> interceptors, String sourceName)`
`static Serializable`	`compileExpression(String expression, ParserContext ctx)` Compiles an expression, and accepts a `ParserContext` instance.
`static Serializable`	`compileGetExpression(char[] expression)`
`static Serializable`	`compileGetExpression(char[] expression, ParserContext ctx)`
`static Serializable`	`compileGetExpression(String expression)`
`static Serializable`	`compileGetExpression(String expression, ParserContext ctx)`
`static Serializable`	`compileSetExpression(char[] expression)`
`static Serializable`	`compileSetExpression(char[] expression, Class ingressType, ParserContext ctx)`
`static Serializable`	`compileSetExpression(char[] expression, int start, int offset, ParserContext ctx)`
`static Serializable`	`compileSetExpression(char[] expression, ParserContext ctx)`
`static Serializable`	`compileSetExpression(String expression)`
`static Serializable`	`compileSetExpression(String expression, Class ingressType, ParserContext ctx)`
`static Serializable`	`compileSetExpression(String expression, ParserContext ctx)`
`static Object`	`eval(char[] expression)` Evaluate an expression and return the value.
`static <T> T`	`eval(char[] expression, Class<T> type)`
`static Object`	`eval(char[] expression, int start, int offset, Object ctx, VariableResolverFactory vars)`
`static <T> T`	`eval(char[] expression, int start, int offset, Object ctx, VariableResolverFactory vars, Class<T> toType)`
`static <T> T`	`eval(char[] expression, Map<String,Object> vars, Class<T> toType)` Evaluate an expression with injected variables and return the resultant value.
`static Object`	`eval(char[] expression, Object ctx)` Evaluate an expression against a context object and return the value
`static <T> T`	`eval(char[] expression, Object ctx, Class<T> toType)` Evaluate an expression with a context object and return the value.
`static Object`	`eval(char[] expression, Object ctx, Map vars)` Evaluate an expression against a context object and return the value
`static <T> T`	`eval(char[] expression, Object ctx, Map<String,Object> vars, Class<T> toType)` Evaluate an expression with a context object and injected variables and return the value.
`static Object`	`eval(char[] expression, Object ctx, VariableResolverFactory vars)` Evaluate an expression against a context object and return the value
`static <T> T`	`eval(char[] expression, Object ctx, VariableResolverFactory vars, Class<T> toType)` Evaluate an expression with a context object and injected variables and return the value.
`static <T> T`	`eval(char[] expression, VariableResolverFactory vars, Class<T> toType)` Evaluate an expression with injected variables and return the value.
`static Object`	`eval(String expression)` Evaluate an expression and return the value.
`static <T> T`	`eval(String expression, Class<T> toType)` Evaluates an expression and, if necessary, coerces the resultant value to the specified type.
`static Object`	`eval(String expression, Map<String,Object> vars)` Evaluates an expression against externally injected variables.
`static <T> T`	`eval(String expression, Map<String,Object> vars, Class<T> toType)` Evaluates an expression against externally injected variables.
`static Object`	`eval(String expression, Object ctx)` Evaluate an expression against a context object.
`static <T> T`	`eval(String expression, Object ctx, Class<T> toType)` Evaluates an expression against a context object and, if necessary, coerces the resultant value to the specified type.
`static Object`	`eval(String expression, Object ctx, Map<String,Object> vars)` Evaluates an expression against a context object and externally injected variables.
`static <T> T`	`eval(String expression, Object ctx, Map<String,Object> vars, Class<T> toType)` Evaluates an expression against a context object and externally injected variables.
`static Object`	`eval(String expression, Object ctx, VariableResolverFactory resolverFactory)` Evaluates an expression against a context object and injected variables from a `VariableResolverFactory`.
`static <T> T`	`eval(String expression, Object ctx, VariableResolverFactory vars, Class<T> toType)` Evaluates an expression against a context object and externally injected variables.
`static Object`	`eval(String expression, VariableResolverFactory resolverFactory)` Evaluate an expression with externally injected variables via a `VariableResolverFactory`.
`static <T> T`	`eval(String expression, VariableResolverFactory vars, Class<T> toType)` Evaluates an expression against externally injected variables and, if necessary, coerces the resultant value to the specified type.
`static Object`	`evalFile(File file)` Evaluate a script from a file and return the resultant value.
`static Object`	`evalFile(File file, Map<String,Object> vars)` Evaluate a script from a file with injected variables and return the resultant value.
`static Object`	`evalFile(File file, Object ctx)` Evaluate a script from a file, against a context object and return the resultant value.
`static Object`	`evalFile(File file, Object ctx, Map<String,Object> vars)` Evaluate a script from a file with injected variables and a context object, then return the resultant value.
`static Object`	`evalFile(File file, Object ctx, VariableResolverFactory vars)` Evaluate a script from a file with injected variables and a context object, then return the resultant value.
`static Object`	`evalFile(File file, String encoding)`
`static Object`	`evalFile(File file, String encoding, Object ctx)`
`static Object`	`evalFile(File file, String encoding, Object ctx, Map<String,Object> vars)`
`static Object`	`evalFile(File file, String encoding, Object ctx, VariableResolverFactory vars)`
`static Boolean`	`evalToBoolean(String expression, Map<String,Object> vars)` Evaluate an expression in Boolean-only with injected variables.
`static Boolean`	`evalToBoolean(String expression, Object ctx)` Evaluate an expression in Boolean-only mode against a root context object.
`static Boolean`	`evalToBoolean(String expression, Object ctx, Map<String,Object> vars)` Evaluate an expression in Boolean-only mode against a root context object and injected variables.
`static Boolean`	`evalToBoolean(String expression, Object ctx, VariableResolverFactory vars)` Evaluate an expression in Boolean-only mode against a root context object and injected variables.
`static Boolean`	`evalToBoolean(String expression, VariableResolverFactory vars)` Evaluate an expression in Boolean-only with injected variables.
`static String`	`evalToString(String expression)` Evaluates an expression and returns the resultant value as a String.
`static String`	`evalToString(String expression, Map vars)` Evaluates an expression and returns the resultant value as a String.
`static String`	`evalToString(String expression, Object ctx)` Evaluates an expression and returns the resultant value as a String.
`static String`	`evalToString(String expression, Object ctx, Map vars)` Evaluates an expression and returns the resultant value as a String.
`static String`	`evalToString(String expression, Object ctx, VariableResolverFactory vars)` Evaluates an expression and returns the resultant value as a String.
`static String`	`evalToString(String expression, VariableResolverFactory vars)` Evaluates an expression and returns the resultant value as a String.
`static Object[]`	`executeAllExpression(Serializable[] compiledExpressions, Object ctx, VariableResolverFactory vars)`
`static Object`	`executeDebugger(CompiledExpression expression, Object ctx, VariableResolverFactory vars)`
`static void`	`executeExpression(Iterable<CompiledExpression> compiledExpression)`
`static void`	`executeExpression(Iterable<CompiledExpression> compiledExpression, Map vars)`
`static void`	`executeExpression(Iterable<CompiledExpression> compiledExpression, Object ctx)`
`static void`	`executeExpression(Iterable<CompiledExpression> compiledExpression, Object ctx, Map vars)`
`static void`	`executeExpression(Iterable<CompiledExpression> compiledExpression, Object ctx, VariableResolverFactory vars)`
`static Object`	`executeExpression(Object compiledExpression)`
`static Object`	`executeExpression(Object compiledExpression, Map vars)` Executes a compiled expression.
`static <T> T`	`executeExpression(Object compiledExpression, Map vars, Class<T> toType)` Execute a compiled expression and convert the result to a type
`static Object`	`executeExpression(Object compiledExpression, Object ctx)` Executes a compiled expression.
`static <T> T`	`executeExpression(Object compiledExpression, Object ctx, Class<T> toType)` Execute a compiled expression and convert the result to a type.
`static Object`	`executeExpression(Object compiledExpression, Object ctx, Map vars)` Executes a compiled expression.
`static <T> T`	`executeExpression(Object compiledExpression, Object ctx, Map vars, Class<T> toType)` Execute a compiled expression and convert the result to a type
`static Object`	`executeExpression(Object compiledExpression, Object ctx, VariableResolverFactory resolverFactory)`
`static <T> T`	`executeExpression(Object compiledExpression, Object ctx, VariableResolverFactory vars, Class<T> toType)`
`static Object`	`executeExpression(Object compiledExpression, VariableResolverFactory factory)` Executes a compiled expression.
`static void`	`executeSetExpression(Serializable compiledSet, Object ctx, Object value)`
`static void`	`executeSetExpression(Serializable compiledSet, Object ctx, VariableResolverFactory vrf, Object value)`
`static String`	`getDebuggingOutputFileName()`
`static Object`	`getProperty(String property, Object ctx)`
`static Method`	`getStaticMethod(Class cls, String methodName, Class[] signature)` A simple utility method to get a static method from a class with no checked exception.
`static boolean`	`isAdvancedDebugging()`
`static boolean`	`isFileDebugging()`
`static String`	`parseMacros(String input, Map<String,Macro> macros)`
`static String`	`preprocess(char[] input, PreProcessor[] preprocessors)`
`static String`	`preprocess(String input, PreProcessor[] preprocessors)`
`static void`	`resetDefaultCompilerOpts()`
`static void`	`setProperty(Object ctx, String property, Object value)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - NAME
```
public static final String NAME
```
    See Also:
    Constant Field Values
  - VERSION
```
public static final String VERSION
```
    See Also:
    Constant Field Values
  - VERSION_SUB
```
public static final String VERSION_SUB
```
    See Also:
    Constant Field Values
  - CODENAME
```
public static final String CODENAME
```
    See Also:
    Constant Field Values
  - INVOKED_METHOD_EXCEPTIONS_BUBBLE
```
public static boolean INVOKED_METHOD_EXCEPTIONS_BUBBLE
```
  - COMPILER_OPT_ALLOW_NAKED_METH_CALL
```
public static boolean COMPILER_OPT_ALLOW_NAKED_METH_CALL
```
  - COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING
```
public static boolean COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING
```
  - COMPILER_OPT_ALLOW_RESOLVE_INNERCLASSES_WITH_DOTNOTATION
```
public static boolean COMPILER_OPT_ALLOW_RESOLVE_INNERCLASSES_WITH_DOTNOTATION
```
  - COMPILER_OPT_SUPPORT_JAVA_STYLE_CLASS_LITERALS
```
public static boolean COMPILER_OPT_SUPPORT_JAVA_STYLE_CLASS_LITERALS
```
  - COMPILER_OPT_ALLOCATE_TYPE_LITERALS_TO_SHARED_SYMBOL_TABLE
```
public static boolean COMPILER_OPT_ALLOCATE_TYPE_LITERALS_TO_SHARED_SYMBOL_TABLE
```
  - COMPILER_OPT_PROPERTY_ACCESS_DOESNT_FAIL
```
public static boolean COMPILER_OPT_PROPERTY_ACCESS_DOESNT_FAIL
```
- Method Detail
  - resetDefaultCompilerOpts
```
public static void resetDefaultCompilerOpts()
```
  - isAdvancedDebugging
```
public static boolean isAdvancedDebugging()
```
  - getDebuggingOutputFileName
```
public static String getDebuggingOutputFileName()
```
  - isFileDebugging
```
public static boolean isFileDebugging()
```
  - eval
```
public static Object eval(String expression)
```
    Evaluate an expression and return the value.
    
    Parameters:
    expression - A String containing the expression to be evaluated.
    
    Returns:
    the resultant value
  - eval
```
public static Object eval(String expression,
          Object ctx)
```
    Evaluate an expression against a context object. Expressions evaluated against a context object are designed to treat members of that context object as variables in the expression. For example:
```
 MVEL.eval("foo == 1", ctx);
 
```
    In this case, the identifier foo would be resolved against the ctx object. So it would have the equivalent of: ctc.getFoo() == 1 in Java.
    Parameters:
    expression - A String containing the expression to be evaluated.
    ctx - The context object to evaluate against.
    
    Returns:
    The resultant value
  - eval
```
public static Object eval(String expression,
          VariableResolverFactory resolverFactory)
```
    Evaluate an expression with externally injected variables via a VariableResolverFactory. A factory provides the means by which MVEL can resolve external variables. MVEL contains a straight-forward implementation for wrapping Maps: MapVariableResolverFactory, which is used implicitly when calling overloaded methods in this class that use Maps.
    An example:
```
 Map varsMap = new HashMap();
 varsMap.put("x", 5);
 varsMap.put("y", 2);
 
 VariableResolverFactory factory = new MapVariableResolverFactory(varsMap);
 

 Integer i = (Integer) MVEL.eval("x * y", factory);
 
 assert i == 10;
 
```
    Parameters:
    expression - A String containing the expression to be evaluated.
    resolverFactory - The instance of the VariableResolverFactory to be used.
    
    Returns:
    The resultant value.
  - eval
```
public static Object eval(String expression,
          Object ctx,
          VariableResolverFactory resolverFactory)
```
    Evaluates an expression against a context object and injected variables from a VariableResolverFactory. This method of execution will prefer to find variables from the factory and then from the context.
    
    Parameters:
    expression - A string containing the expression to be evaluated
    ctx - The context object to evaluate against.
    resolverFactory - The instance of the VariableResolverFactory to be used.
    
    Returns:
    The resultant value
    See Also:
    eval(String, org.mule.mvel2.integration.VariableResolverFactory)
  - eval
```
public static Object eval(String expression,
          Map<String,Object> vars)
```
    Evaluates an expression against externally injected variables. This is a wrapper convenience method which wraps the provided Map of vars in a MapVariableResolverFactory
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    vars - A map of vars to be injected
    
    Returns:
    The resultant value
    See Also:
    eval(String, org.mule.mvel2.integration.VariableResolverFactory)
  - eval
```
public static Object eval(String expression,
          Object ctx,
          Map<String,Object> vars)
```
    Evaluates an expression against a context object and externally injected variables. This is a wrapper convenience method which wraps the provided Map of vars in a MapVariableResolverFactory
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    ctx - The context object to evaluate against.
    vars - A map of vars to be injected
    
    Returns:
    The resultant value
    See Also:
    eval(String, VariableResolverFactory)
  - eval
```
public static <T> T eval(String expression,
         Class<T> toType)
```
    Evaluates an expression and, if necessary, coerces the resultant value to the specified type. Example:
```
 Float output = MVEL.eval("5 + 5", Float.class);
 
```
    This converts an expression that would otherwise return an Integer to a Float.
    Parameters:
    expression - A string containing the expression to be evaluated.
    toType - The target type that the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value.
  - eval
```
public static <T> T eval(String expression,
         Object ctx,
         Class<T> toType)
```
    Evaluates an expression against a context object and, if necessary, coerces the resultant value to the specified type.
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    ctx - The context object to evaluate against.
    toType - The target type that the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value
    See Also:
    eval(String, Class)
  - eval
```
public static <T> T eval(String expression,
         VariableResolverFactory vars,
         Class<T> toType)
```
    Evaluates an expression against externally injected variables and, if necessary, coerces the resultant value to the specified type.
    
    Parameters:
    expression - A string containing the expression to be evaluated
    vars - The variables to be injected
    toType - The target type that the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value
    See Also:
    eval(String, VariableResolverFactory), eval(String, Class)
  - eval
```
public static <T> T eval(String expression,
         Map<String,Object> vars,
         Class<T> toType)
```
    Evaluates an expression against externally injected variables. The resultant value is coerced to the specified type if necessary. This is a wrapper convenience method which wraps the provided Map of vars in aMapVariableResolverFactory
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    vars - A map of vars to be injected
    toType - The target type the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value
    See Also:
    eval(String, org.mule.mvel2.integration.VariableResolverFactory)
  - eval
```
public static <T> T eval(String expression,
         Object ctx,
         VariableResolverFactory vars,
         Class<T> toType)
```
    Evaluates an expression against a context object and externally injected variables. If necessary, the resultant value is coerced to the specified type.
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    ctx - The context object to evaluate against
    vars - The vars to be injected
    toType - The target type that the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value.
    See Also:
    eval(String, Object, VariableResolverFactory), eval(String, Class)
  - eval
```
public static <T> T eval(String expression,
         Object ctx,
         Map<String,Object> vars,
         Class<T> toType)
```
    Evaluates an expression against a context object and externally injected variables. If necessary, the resultant value is coerced to the specified type.
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    ctx - The context object to evaluate against
    vars - A Map of variables to be injected.
    toType - The target type that the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value.
    See Also:
    eval(String, Object, VariableResolverFactory), eval(String, Class)
  - evalToString
```
public static String evalToString(String expression)
```
    Evaluates an expression and returns the resultant value as a String.
    
    Parameters:
    expression - A string containing the expressino to be evaluated.
    
    Returns:
    The resultant value
  - evalToString
```
public static String evalToString(String expression,
                  Object ctx)
```
    Evaluates an expression and returns the resultant value as a String.
    
    Parameters:
    expression - A string containing the expressino to be evaluated.
    ctx - The context object to evaluate against
    
    Returns:
    The resultant value
    See Also:
    eval(String, Object)
  - evalToString
```
public static String evalToString(String expression,
                  VariableResolverFactory vars)
```
    Evaluates an expression and returns the resultant value as a String.
    
    Parameters:
    expression - A string containing the expressino to be evaluated.
    vars - The variables to be injected
    
    Returns:
    The resultant value
    See Also:
    eval(String, VariableResolverFactory)
  - evalToString
```
public static String evalToString(String expression,
                  Map vars)
```
    Evaluates an expression and returns the resultant value as a String.
    
    Parameters:
    expression - A string containing the expressino to be evaluated.
    vars - A Map of variables to be injected
    
    Returns:
    The resultant value
    See Also:
    eval(String, Map)
  - evalToString
```
public static String evalToString(String expression,
                  Object ctx,
                  VariableResolverFactory vars)
```
    Evaluates an expression and returns the resultant value as a String.
    
    Parameters:
    expression - A string containing the expressino to be evaluated.
    ctx - The context object to evaluate against.
    vars - The variables to be injected
    
    Returns:
    The resultant value
    See Also:
    eval(String, Map)
  - evalToString
```
public static String evalToString(String expression,
                  Object ctx,
                  Map vars)
```
    Evaluates an expression and returns the resultant value as a String.
    
    Parameters:
    expression - A string containing the expressino to be evaluated.
    ctx - The context object to evaluate against.
    vars - A Map of variables to be injected
    
    Returns:
    The resultant value
    See Also:
    eval(String, Map)
  - eval
```
public static Object eval(char[] expression)
```
    Evaluate an expression and return the value.
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    
    Returns:
    The resultant value
    See Also:
    eval(String)
  - eval
```
public static Object eval(char[] expression,
          Object ctx)
```
    Evaluate an expression against a context object and return the value
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    ctx - The context object to evaluate against
    
    Returns:
    The resultant value
    See Also:
    eval(String, Object)
  - eval
```
public static <T> T eval(char[] expression,
         Class<T> type)
```
  - eval
```
public static Object eval(char[] expression,
          Object ctx,
          VariableResolverFactory vars)
```
    Evaluate an expression against a context object and return the value
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    ctx - The context object to evaluate against
    vars - The variables to be injected
    
    Returns:
    The resultant value
    See Also:
    eval(String, Object, VariableResolverFactory)
  - eval
```
public static Object eval(char[] expression,
          int start,
          int offset,
          Object ctx,
          VariableResolverFactory vars)
```
  - eval
```
public static <T> T eval(char[] expression,
         int start,
         int offset,
         Object ctx,
         VariableResolverFactory vars,
         Class<T> toType)
```
  - eval
```
public static Object eval(char[] expression,
          Object ctx,
          Map vars)
```
    Evaluate an expression against a context object and return the value
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    ctx - The context object to evaluate against
    vars - A Map of variables to be injected
    
    Returns:
    The resultant value
    See Also:
    eval(String, Object, Map)
  - eval
```
public static <T> T eval(char[] expression,
         Object ctx,
         Map<String,Object> vars,
         Class<T> toType)
```
    Evaluate an expression with a context object and injected variables and return the value. If necessary convert the resultant value to the specified type.
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    ctx - The context object to evaluate against
    vars - A Map of variables to be injected
    toType - The target type the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value
    See Also:
    eval(String, Object, Map, Class)
  - eval
```
public static <T> T eval(char[] expression,
         Object ctx,
         Class<T> toType)
```
    Evaluate an expression with a context object and return the value. If necessary convert the resultant value to the specified type.
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    ctx - The context object to evaluate against
    toType - The target type the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value
    See Also:
    eval(String, Object, Class)
  - eval
```
public static <T> T eval(char[] expression,
         Object ctx,
         VariableResolverFactory vars,
         Class<T> toType)
```
    Evaluate an expression with a context object and injected variables and return the value. If necessary convert the resultant value to the specified type.
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    ctx - The context object to evaluate against
    vars - The variables to be injected
    toType - The target type the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value
    See Also:
    eval(String, Object, VariableResolverFactory, Class)
  - eval
```
public static <T> T eval(char[] expression,
         VariableResolverFactory vars,
         Class<T> toType)
```
    Evaluate an expression with injected variables and return the value. If necessary convert the resultant value to the specified type.
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    vars - The variables to be injected
    toType - The target type the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value
    See Also:
    eval(String, VariableResolverFactory, Class)
  - eval
```
public static <T> T eval(char[] expression,
         Map<String,Object> vars,
         Class<T> toType)
```
    Evaluate an expression with injected variables and return the resultant value. If necessary convert the resultant value to the specified type.
    
    Parameters:
    expression - A char[] containing the expression to be evaluated.
    vars - The variables to be injected
    toType - The target type the resultant value will be converted to, if necessary.
    
    Returns:
    The resultant value
    See Also:
    eval(String, Map, Class)
  - evalFile
```
public static Object evalFile(File file)
                       throws IOException
```
    Evaluate a script from a file and return the resultant value.
    
    Parameters:
    file - The file to process
    
    Returns:
    The resultant value
    
    Throws:
    
    IOException - Exception thrown if there is an IO problem accessing the file.
  - evalFile
```
public static Object evalFile(File file,
              String encoding)
                       throws IOException
```
    Throws:
    
    IOException
  - evalFile
```
public static Object evalFile(File file,
              Object ctx)
                       throws IOException
```
    Evaluate a script from a file, against a context object and return the resultant value.
    
    Parameters:
    file - The file to process
    ctx - The context to evaluate the script against.
    
    Returns:
    The resultant value
    
    Throws:
    
    IOException - Exception thrown if there is an IO problem accessing the file.
  - evalFile
```
public static Object evalFile(File file,
              String encoding,
              Object ctx)
                       throws IOException
```
    Throws:
    
    IOException
  - evalFile
```
public static Object evalFile(File file,
              Map<String,Object> vars)
                       throws IOException
```
    Evaluate a script from a file with injected variables and return the resultant value.
    
    Parameters:
    file - The file to process
    vars - Variables to be injected
    
    Returns:
    The resultant value
    
    Throws:
    
    IOException - Exception thrown if there is an IO problem accessing the file.
  - evalFile
```
public static Object evalFile(File file,
              Object ctx,
              Map<String,Object> vars)
                       throws IOException
```
    Evaluate a script from a file with injected variables and a context object, then return the resultant value.
    
    Parameters:
    file - The file to process
    ctx - The context to evaluate the script against.
    vars - Variables to be injected
    
    Returns:
    The resultant value
    
    Throws:
    
    IOException - Exception thrown if there is an IO problem accessing the file.
  - evalFile
```
public static Object evalFile(File file,
              String encoding,
              Object ctx,
              Map<String,Object> vars)
                       throws IOException
```
    Throws:
    
    IOException
  - evalFile
```
public static Object evalFile(File file,
              Object ctx,
              VariableResolverFactory vars)
                       throws IOException
```
    Evaluate a script from a file with injected variables and a context object, then return the resultant value.
    
    Parameters:
    file - The file to process
    ctx - The context to evaluate the script against.
    vars - Variables to be injected
    
    Returns:
    The resultant value
    
    Throws:
    
    IOException - Exception thrown if there is an IO problem accessing the file.
  - evalFile
```
public static Object evalFile(File file,
              String encoding,
              Object ctx,
              VariableResolverFactory vars)
                       throws IOException
```
    Throws:
    
    IOException
  - evalToBoolean
```
public static Boolean evalToBoolean(String expression,
                    Object ctx,
                    Map<String,Object> vars)
```
    Evaluate an expression in Boolean-only mode against a root context object and injected variables.
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    ctx - The context against which to evaluate the expression
    vars - The variables to be injected
    
    Returns:
    The resultant value as a Boolean
  - evalToBoolean
```
public static Boolean evalToBoolean(String expression,
                    Object ctx)
```
    Evaluate an expression in Boolean-only mode against a root context object.
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    ctx - The context against which to evaluate the expression
    
    Returns:
    The resultant value as a Boolean
  - evalToBoolean
```
public static Boolean evalToBoolean(String expression,
                    Object ctx,
                    VariableResolverFactory vars)
```
    Evaluate an expression in Boolean-only mode against a root context object and injected variables.
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    ctx - The context against which to evaluate the expression
    vars - The variables to be injected
    
    Returns:
    The resultant value as a Boolean
  - evalToBoolean
```
public static Boolean evalToBoolean(String expression,
                    VariableResolverFactory vars)
```
    Evaluate an expression in Boolean-only with injected variables.
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    vars - The variables to be injected
    
    Returns:
    The resultant value as a Boolean
  - evalToBoolean
```
public static Boolean evalToBoolean(String expression,
                    Map<String,Object> vars)
```
    Evaluate an expression in Boolean-only with injected variables.
    
    Parameters:
    expression - A string containing the expression to be evaluated.
    vars - The variables to be injected
    
    Returns:
    The resultant value as a Boolean
  - analysisCompile
```
public static void analysisCompile(char[] expression,
                   ParserContext ctx)
```
    Performs an analysis compileShared, which will populate the ParserContext with type, input and variable information, but will not produce a payload.
    
    Parameters:
    expression - - the expression to analyze
    ctx - - the parser context
  - analysisCompile
```
public static void analysisCompile(String expression,
                   ParserContext ctx)
```
  - analyze
```
public static Class analyze(char[] expression,
            ParserContext ctx)
```
  - analyze
```
public static Class analyze(String expression,
            ParserContext ctx)
```
  - compileExpression
```
public static Serializable compileExpression(String expression)
```
    Compiles an expression and returns a Serializable object containing the compiled expression. The returned value can be reused for higher-performance evaluation of the expression. It is used in a straight forward way:
```
 
 // Compile the expression
 Serializable compiled = MVEL.compileExpression("x * 10");
 

 // Create a Map to hold the variables.
 Map vars = new HashMap();
 

 // Create a factory to envelop the variable map
 VariableResolverFactory factory = new MapVariableResolverFactory(vars);
 

 int total = 0;
 for (int i = 0; i < 100; i++) {
 // Update the 'x' variable.
 vars.put("x", i);
 

 // Execute the expression against the compiled payload and factory, and add the result to the total variable.
 total += (Integer) MVEL.executeExpression(compiled, factory);
 }
 
 // Total should be 49500
 assert total == 49500;
 
```
    The above example demonstrates a compiled expression being reused ina tight, closed, loop. Doing this greatly improves performance as re-parsing of the expression is not required, and the runtime can dynamically compileShared the expression to bytecode of necessary.
    Parameters:
    expression - A String contaiing the expression to be compiled.
    
    Returns:
    The cacheable compiled payload.
  - compileExpression
```
public static Serializable compileExpression(String expression,
                             Map<String,Object> imports)
```
    Compiles an expression and returns a Serializable object containing the compiled expression. This method also accept a Map of imports. The Map's keys are String's representing the imported, short-form name of the Classes or Methods imported. An import of a Method is essentially a static import. This is a substitute for needing to declare import statements within the actual script.
```
 Map imports = new HashMap();
 imports.put("HashMap", java.util.HashMap.class); // import a class
 imports.put("time", MVEL.getStaticMethod(System.class, "currentTimeMillis", new Class[0])); // import a static method
 
 // Compile the expression
 Serializable compiled = MVEL.compileExpression("map = new HashMap(); map.put('time', time()); map.time");
 

 // Execute with a blank Map to allow vars to be declared.
 Long val = (Long) MVEL.executeExpression(compiled, new HashMap());
 
 assert val > 0;
 
```
    Parameters:
    expression - A String contaiing the expression to be compiled.
    imports - A String-Class/String-Method pair Map containing imports for the compiler.
    
    Returns:
    The cacheable compiled payload.
  - compileExpression
```
public static Serializable compileExpression(String expression,
                             Map<String,Object> imports,
                             Map<String,Interceptor> interceptors)
```
    Compiles an expression and returns a Serializable object containing the compiled expression. This method accepts a Map of imports and Interceptors. See compileExpression(String, Map) for information on imports. The imports parameter in this method is optional and it is safe to pass a null value.
    Interceptors are markers within an expression that allow external hooks to be tied into the expression.
```
 // Create a Map to hold the interceptors.
 Map interceptors = new HashMap();
 
 // Create a simple interceptor.
 Interceptor logInterceptor = new Interceptor() {
 public int doBefore(ASTNode node, VariableResolverFactory factory) {
 System.out.println("Interceptor called before!");
 }
 

 public int doAfter(Object exitValue, ASTNode node, VariableResolverFactory factory) {
 System.out.println("Interceptor called after!");
 }
 };
 

 // Add the interceptor to the Map.
 interceptors.put("log", logInterceptor);
 

 // Create an expression
 String expr = "list = [1,2,3,4,5]; @log for (item : list) { System.out.println(item); };
 

 Serializable compiled = MVEL.compileExpression(expr, null, interceptors);
 
 // Execute expression with a blank Map to allow vars to be declared.
 MVEL.executeExpression(compiled, new HashMap());
 
```
    The above example demonstrates inserting an interceptor into a piece of code. The @log interceptor wraps the subsequent statement. In this case, the interceptor is fired before the for loop and after the for loop finishes.
    Parameters:
    expression - A String containing the expression to be evaluated.
    imports - A String-Class/String-Method pair Map containing imports for the compiler.
    interceptors - A Map of registered interceptors.
    
    Returns:
    A cacheable compiled payload.
  - compileExpression
```
public static Serializable compileExpression(String expression,
                             ParserContext ctx)
```
    Compiles an expression, and accepts a ParserContext instance. The ParserContext object is the fine-grained configuration object for the MVEL parser and compiler.
    
    Parameters:
    expression - A string containing the expression to be compiled.
    ctx - The parser context
    
    Returns:
    A cacheable compiled payload.
  - compileExpression
```
public static Serializable compileExpression(char[] expression,
                             int start,
                             int offset,
                             ParserContext ctx)
```
  - compileExpression
```
public static Serializable compileExpression(String expression,
                             Map<String,Object> imports,
                             Map<String,Interceptor> interceptors,
                             String sourceName)
```
  - compileExpression
```
public static Serializable compileExpression(char[] expression,
                             ParserContext ctx)
```
  - compileExpression
```
public static Serializable compileExpression(char[] expression,
                             Map<String,Object> imports,
                             Map<String,Interceptor> interceptors,
                             String sourceName)
```
    Compiles an expression and returns a Serializable object containing the compiled expression.
    
    Parameters:
    expression - The expression to be compiled
    imports - Imported classes
    interceptors - Map of named interceptos
    sourceName - The name of the source file being evaluated (optional)
    
    Returns:
    The cacheable compiled payload
  - compileExpression
```
public static Serializable compileExpression(char[] expression)
```
  - compileExpression
```
public static Serializable compileExpression(char[] expression,
                             Map<String,Object> imports)
```
  - compileExpression
```
public static Serializable compileExpression(char[] expression,
                             Map<String,Object> imports,
                             Map<String,Interceptor> interceptors)
```
  - compileGetExpression
```
public static Serializable compileGetExpression(String expression)
```
  - compileGetExpression
```
public static Serializable compileGetExpression(String expression,
                                ParserContext ctx)
```
  - compileGetExpression
```
public static Serializable compileGetExpression(char[] expression)
```
  - compileGetExpression
```
public static Serializable compileGetExpression(char[] expression,
                                ParserContext ctx)
```
  - compileSetExpression
```
public static Serializable compileSetExpression(String expression)
```
  - compileSetExpression
```
public static Serializable compileSetExpression(String expression,
                                ParserContext ctx)
```
  - compileSetExpression
```
public static Serializable compileSetExpression(String expression,
                                Class ingressType,
                                ParserContext ctx)
```
  - compileSetExpression
```
public static Serializable compileSetExpression(char[] expression)
```
  - compileSetExpression
```
public static Serializable compileSetExpression(char[] expression,
                                ParserContext ctx)
```
  - compileSetExpression
```
public static Serializable compileSetExpression(char[] expression,
                                int start,
                                int offset,
                                ParserContext ctx)
```
  - compileSetExpression
```
public static Serializable compileSetExpression(char[] expression,
                                Class ingressType,
                                ParserContext ctx)
```
  - executeSetExpression
```
public static void executeSetExpression(Serializable compiledSet,
                        Object ctx,
                        Object value)
```
  - executeSetExpression
```
public static void executeSetExpression(Serializable compiledSet,
                        Object ctx,
                        VariableResolverFactory vrf,
                        Object value)
```
  - executeExpression
```
public static Object executeExpression(Object compiledExpression)
```
  - executeExpression
```
public static Object executeExpression(Object compiledExpression,
                       Object ctx,
                       Map vars)
```
    Executes a compiled expression.
    
    Parameters:
    compiledExpression - -
    ctx - -
    vars - -
    
    Returns:
    -
    See Also:
    compileExpression(String)
  - executeExpression
```
public static Object executeExpression(Object compiledExpression,
                       Object ctx,
                       VariableResolverFactory resolverFactory)
```
  - executeExpression
```
public static Object executeExpression(Object compiledExpression,
                       VariableResolverFactory factory)
```
    Executes a compiled expression.
    
    Parameters:
    compiledExpression - -
    factory - -
    
    Returns:
    -
    See Also:
    compileExpression(String)
  - executeExpression
```
public static Object executeExpression(Object compiledExpression,
                       Object ctx)
```
    Executes a compiled expression.
    
    Parameters:
    compiledExpression - -
    ctx - -
    
    Returns:
    -
    See Also:
    compileExpression(String)
  - executeExpression
```
public static Object executeExpression(Object compiledExpression,
                       Map vars)
```
    Executes a compiled expression.
    
    Parameters:
    compiledExpression - -
    vars - -
    
    Returns:
    -
    See Also:
    compileExpression(String)
  - executeExpression
```
public static <T> T executeExpression(Object compiledExpression,
                      Object ctx,
                      Map vars,
                      Class<T> toType)
```
    Execute a compiled expression and convert the result to a type
    
    Parameters:
    compiledExpression - -
    ctx - -
    vars - -
    toType - -
    
    Returns:
    -
  - executeExpression
```
public static <T> T executeExpression(Object compiledExpression,
                      Object ctx,
                      VariableResolverFactory vars,
                      Class<T> toType)
```
  - executeExpression
```
public static <T> T executeExpression(Object compiledExpression,
                      Map vars,
                      Class<T> toType)
```
    Execute a compiled expression and convert the result to a type
    
    Parameters:
    compiledExpression - -
    vars - -
    toType - -
    
    Returns:
    -
  - executeExpression
```
public static <T> T executeExpression(Object compiledExpression,
                      Object ctx,
                      Class<T> toType)
```
    Execute a compiled expression and convert the result to a type.
    
    Parameters:
    compiledExpression - -
    ctx - -
    toType - -
    
    Returns:
    -
  - executeExpression
```
public static void executeExpression(Iterable<CompiledExpression> compiledExpression)
```
  - executeExpression
```
public static void executeExpression(Iterable<CompiledExpression> compiledExpression,
                     Object ctx)
```
  - executeExpression
```
public static void executeExpression(Iterable<CompiledExpression> compiledExpression,
                     Map vars)
```
  - executeExpression
```
public static void executeExpression(Iterable<CompiledExpression> compiledExpression,
                     Object ctx,
                     Map vars)
```
  - executeExpression
```
public static void executeExpression(Iterable<CompiledExpression> compiledExpression,
                     Object ctx,
                     VariableResolverFactory vars)
```
  - executeAllExpression
```
public static Object[] executeAllExpression(Serializable[] compiledExpressions,
                            Object ctx,
                            VariableResolverFactory vars)
```
  - executeDebugger
```
public static Object executeDebugger(CompiledExpression expression,
                     Object ctx,
                     VariableResolverFactory vars)
```
  - parseMacros
```
public static String parseMacros(String input,
                 Map<String,Macro> macros)
```
  - preprocess
```
public static String preprocess(char[] input,
                PreProcessor[] preprocessors)
```
  - preprocess
```
public static String preprocess(String input,
                PreProcessor[] preprocessors)
```
  - getProperty
```
public static Object getProperty(String property,
                 Object ctx)
```
  - setProperty
```
public static void setProperty(Object ctx,
               String property,
               Object value)
```
  - getStaticMethod
```
public static Method getStaticMethod(Class cls,
                     String methodName,
                     Class[] signature)
```
    A simple utility method to get a static method from a class with no checked exception. With throw a RuntimeException if the method is not found or is not a static method.
    
    Parameters:
    cls - The class containing the static method
    methodName - The method name
    signature - The signature of the method
    
    Returns:
    An instance of the Method

Class MVEL

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NAME

VERSION

VERSION_SUB

CODENAME

INVOKED_METHOD_EXCEPTIONS_BUBBLE

COMPILER_OPT_ALLOW_NAKED_METH_CALL

COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING

COMPILER_OPT_ALLOW_RESOLVE_INNERCLASSES_WITH_DOTNOTATION

COMPILER_OPT_SUPPORT_JAVA_STYLE_CLASS_LITERALS

COMPILER_OPT_ALLOCATE_TYPE_LITERALS_TO_SHARED_SYMBOL_TABLE

COMPILER_OPT_PROPERTY_ACCESS_DOESNT_FAIL

Method Detail

resetDefaultCompilerOpts

isAdvancedDebugging

getDebuggingOutputFileName

isFileDebugging

eval

eval

eval

eval

eval

eval

eval

eval

eval

eval

eval

eval

evalToString

evalToString

evalToString

evalToString

evalToString

evalToString

eval

eval

eval

eval

eval

eval

eval

eval

eval

eval

eval

eval

evalFile

evalFile

evalFile

evalFile

evalFile

evalFile

evalFile

evalFile

evalFile

evalToBoolean

evalToBoolean

evalToBoolean

evalToBoolean

evalToBoolean

analysisCompile

analysisCompile

analyze

analyze

compileExpression

compileExpression

compileExpression

compileExpression

compileExpression

compileExpression

compileExpression

compileExpression

compileExpression

compileExpression

compileExpression