Package com.googlecode.aviator

Class BaseExpression

java.lang.Object

com.googlecode.aviator.BaseExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

ClassExpression, LiteralExpression

public abstract class BaseExpression
extends Object
implements Expression

Base expression

Author:

dennis

Field Summary

Fields

Modifier and Type	Field	Description
static String	FUNC_PARAMS_VAR
protected AviatorEvaluatorInstance	instance
protected SymbolTable	symbolTable

Constructor Summary

Constructors

Constructor	Description
BaseExpression(AviatorEvaluatorInstance instance, List<String> varNames, SymbolTable symbolTable)

Method Summary

Modifier and Type	Method	Description
String	addSymbol(String name)	Adds the specified symbol to the symbol table and returns a reference to the unique symbol.
Object	execute()	Execute expression with empty environment
Object	execute(Map<String,Object> map)	Execute expression with environment
abstract Object	executeDirectly(Map<String,Object> env)
protected Env	genTopEnv(Map<String,Object> map)
Env	getCompileEnv()
String	getExpression()	Returns the expression string when turn on Options.TRACE_EVAL option, else returns null.
AviatorEvaluatorInstance.StringSegments	getStringSegements(String lexeme)
List<String>	getVariableFullNames()	Returns this expression's all variable full names in order when using AviatorEvaluator.EVAL mode,else returns empty set
List<String>	getVariableNames()	Returns this expression's all variable names in order when using AviatorEvaluator.EVAL mode,else returns empty set
Map<String,Object>	newEnv(Object... args)	Created a faster env map(compare variable names by reference).The arguments should be a sequence of pair .
protected Env	newEnv(Map<String,Object> map)
protected Env	newEnv(Map<String,Object> map, boolean direct)
void	setCompileEnv(Env compileEnv)
void	setExpression(String expression)
void	setFuncsArgs(Map<Integer,List<FunctionArgument>> funcsArgs)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

FUNC_PARAMS_VAR

public static final String FUNC_PARAMS_VAR

See Also:

Constant Field Values

instance

protected AviatorEvaluatorInstance instance

symbolTable

protected SymbolTable symbolTable

Constructor Detail

BaseExpression

public BaseExpression(AviatorEvaluatorInstance instance,
                      List<String> varNames,
                      SymbolTable symbolTable)

Method Detail

getStringSegements

public AviatorEvaluatorInstance.StringSegments getStringSegements(String lexeme)

newEnv

public Map<String,Object> newEnv(Object... args)

Description copied from interface: Expression

Created a faster env map(compare variable names by reference).The arguments should be a sequence of pair .

Specified by:

newEnv in interface Expression

Returns:

an env map

executeDirectly

public abstract Object executeDirectly(Map<String,Object> env)

execute

public Object execute(Map<String,Object> map)

Description copied from interface: Expression

Execute expression with environment

Specified by:

execute in interface Expression

Parameters:

map - Binding variable environment

Returns:

setFuncsArgs

public void setFuncsArgs(Map<Integer,List<FunctionArgument>> funcsArgs)

getCompileEnv

public Env getCompileEnv()

setCompileEnv

public void setCompileEnv(Env compileEnv)

getExpression

public String getExpression()

Returns the expression string when turn on Options.TRACE_EVAL option, else returns null.

Returns:

expression in string.

setExpression

public void setExpression(String expression)

addSymbol

public String addSymbol(String name)

Description copied from interface: Expression

Adds the specified symbol to the symbol table and returns a reference to the unique symbol. If the symbol already exists, the previous symbol reference is returned instead, in order guarantee that symbol references remain unique.

Specified by:

addSymbol in interface Expression

Parameters:

name - The symbol name.

execute

public Object execute()

Description copied from interface: Expression

Execute expression with empty environment

Specified by:

execute in interface Expression

Returns:

getVariableFullNames

public List<String> getVariableFullNames()

Description copied from interface: Expression

Returns this expression's all variable full names in order when using AviatorEvaluator.EVAL mode,else returns empty set

Specified by:

getVariableFullNames in interface Expression

Returns:

getVariableNames

public List<String> getVariableNames()

Description copied from interface: Expression

Returns this expression's all variable names in order when using AviatorEvaluator.EVAL mode,else returns empty set

Specified by:

getVariableNames in interface Expression

Returns:

See Also:

AviatorEvaluator.EVAL

newEnv

protected Env newEnv(Map<String,Object> map,
                     boolean direct)

genTopEnv

protected Env genTopEnv(Map<String,Object> map)

newEnv

protected Env newEnv(Map<String,Object> map)