类 javax.el.ELContext
的使用

使用 ELContext 的软件包

com.sun.el
com.sun.el.lang
javax.el	Provides the API for the Unified Expression Language 2.2 used by the JSP 2.2 and JSF 2.0 technologies.
javax.servlet.jsp	Classes and interfaces for the Core JSP 2.1 API.
javax.servlet.jsp.el	Provides the ELResolver classes that define the object resolution rules that must be supported by a JSP container with the new unified Expression Language.
org.apache.jasper.runtime

com.sun.el 中 ELContext 的使用

参数类型为 ELContext 的 com.sun.el 中的方法

MethodExpression	ExpressionFactoryImpl.createMethodExpression(ELContext context, String expression, Class expectedReturnType, Class[] expectedParamTypes)
ValueExpression	ExpressionFactoryImpl.createValueExpression(ELContext context, String expression, Class expectedType)
MethodInfo	MethodExpressionLiteral.getMethodInfo(ELContext context)
MethodInfo	MethodExpressionImpl.getMethodInfo(ELContext context) Evaluates the expression relative to the provided context, and returns information about the actual referenced method.
Class	ValueExpressionLiteral.getType(ELContext context)
Class	ValueExpressionImpl.getType(ELContext context)
Object	ValueExpressionLiteral.getValue(ELContext context)
Object	ValueExpressionImpl.getValue(ELContext context)
ValueReference	ValueExpressionImpl.getValueReference(ELContext context)
Object	MethodExpressionLiteral.invoke(ELContext context, Object[] params)
Object	MethodExpressionImpl.invoke(ELContext context, Object[] params) Evaluates the expression relative to the provided context, invokes the method that was found using the supplied parameters, and returns the result of the method invocation.
boolean	ValueExpressionLiteral.isReadOnly(ELContext context)
boolean	ValueExpressionImpl.isReadOnly(ELContext context)
void	ValueExpressionLiteral.setValue(ELContext context, Object value)
void	ValueExpressionImpl.setValue(ELContext context, Object value)

com.sun.el.lang 中 ELContext 的使用

com.sun.el.lang 中 ELContext 的子类

class

EvaluationContext

返回 ELContext 的 com.sun.el.lang 中的方法

ELContext

EvaluationContext.getELContext()

参数类型为 ELContext 的 com.sun.el.lang 中的构造方法

EvaluationContext(ELContext elContext, FunctionMapper fnMapper, VariableMapper varMapper)

ExpressionBuilder(String expression, ELContext ctx)

javax.el 中 ELContext 的使用

返回 ELContext 的 javax.el 中的方法

ELContext

ELContextEvent.getELContext() Returns the ELContext that was created.

参数类型为 ELContext 的 javax.el 中的方法

abstract MethodExpression	ExpressionFactory.createMethodExpression(ELContext context, String expression, Class<?> expectedReturnType, Class<?>[] expectedParamTypes) Parses an expression into a MethodExpression for later evaluation.
abstract ValueExpression	ExpressionFactory.createValueExpression(ELContext context, String expression, Class<?> expectedType) Parses an expression into a ValueExpression for later evaluation.
Class<?>	ResourceBundleELResolver.getCommonPropertyType(ELContext context, Object base) If the base object is a ResourceBundle, returns the most general type that this resolver accepts for the property argument.
Class<?>	MapELResolver.getCommonPropertyType(ELContext context, Object base) If the base object is a map, returns the most general type that this resolver accepts for the property argument.
Class<?>	ListELResolver.getCommonPropertyType(ELContext context, Object base) If the base object is a list, returns the most general type that this resolver accepts for the property argument.
abstract Class<?>	ELResolver.getCommonPropertyType(ELContext context, Object base) Returns the most general type that this resolver accepts for the property argument, given a base object.
Class<?>	CompositeELResolver.getCommonPropertyType(ELContext context, Object base) Returns the most general type that this resolver accepts for the property argument, given a base object.
Class<?>	BeanELResolver.getCommonPropertyType(ELContext context, Object base) If the base object is not null, returns the most general type that this resolver accepts for the property argument.
Class<?>	ArrayELResolver.getCommonPropertyType(ELContext context, Object base) If the base object is a Java language array, returns the most general type that this resolver accepts for the property argument.
Iterator	ResourceBundleELResolver.getFeatureDescriptors(ELContext context, Object base) If the base object is a ResourceBundle, returns an Iterator containing the set of keys available in the ResourceBundle.
Iterator<FeatureDescriptor>	MapELResolver.getFeatureDescriptors(ELContext context, Object base) If the base object is a map, returns an Iterator containing the set of keys available in the Map.
Iterator<FeatureDescriptor>	ListELResolver.getFeatureDescriptors(ELContext context, Object base) Always returns null, since there is no reason to iterate through set set of all integers.
abstract Iterator<FeatureDescriptor>	ELResolver.getFeatureDescriptors(ELContext context, Object base) Returns information about the set of variables or properties that can be resolved for the given base object.
Iterator<FeatureDescriptor>	CompositeELResolver.getFeatureDescriptors(ELContext context, Object base) Returns information about the set of variables or properties that can be resolved for the given base object.
Iterator<FeatureDescriptor>	BeanELResolver.getFeatureDescriptors(ELContext context, Object base) If the base object is not null, returns an Iterator containing the set of JavaBeans properties available on the given object.
Iterator<FeatureDescriptor>	ArrayELResolver.getFeatureDescriptors(ELContext context, Object base) Always returns null, since there is no reason to iterate through set set of all integers.
abstract MethodInfo	MethodExpression.getMethodInfo(ELContext context) Evaluates the expression relative to the provided context, and returns information about the actual referenced method.
abstract Class<?>	ValueExpression.getType(ELContext context) Evaluates the expression relative to the provided context, and returns the most general type that is acceptable for an object to be passed as the value parameter in a future call to the ValueExpression.setValue(javax.el.ELContext, java.lang.Object) method.
Class<?>	ResourceBundleELResolver.getType(ELContext context, Object base, Object property) If the base object is an instance of ResourceBundle, return null, since the resolver is read only.
Class<?>	MapELResolver.getType(ELContext context, Object base, Object property) If the base object is a map, returns the most general acceptable type for a value in this map.
Class<?>	ListELResolver.getType(ELContext context, Object base, Object property) If the base object is a list, returns the most general acceptable type for a value in this list.
abstract Class<?>	ELResolver.getType(ELContext context, Object base, Object property) For a given base and property, attempts to identify the most general type that is acceptable for an object to be passed as the value parameter in a future call to the ELResolver.setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object) method.
Class<?>	CompositeELResolver.getType(ELContext context, Object base, Object property) For a given base and property, attempts to identify the most general type that is acceptable for an object to be passed as the value parameter in a future call to the CompositeELResolver.setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object) method.
Class<?>	BeanELResolver.getType(ELContext context, Object base, Object property) If the base object is not null, returns the most general acceptable type that can be set on this bean property.
Class<?>	ArrayELResolver.getType(ELContext context, Object base, Object property) If the base object is an array, returns the most general acceptable type for a value in this array.
abstract Object	ValueExpression.getValue(ELContext context) Evaluates the expression relative to the provided context, and returns the resulting value.
Object	ResourceBundleELResolver.getValue(ELContext context, Object base, Object property) If the base object is an instance of ResourceBundle, the provided property will first be coerced to a String.
Object	MapELResolver.getValue(ELContext context, Object base, Object property) If the base object is a map, returns the value associated with the given key, as specified by the property argument.
Object	ListELResolver.getValue(ELContext context, Object base, Object property) If the base object is a list, returns the value at the given index.
abstract Object	ELResolver.getValue(ELContext context, Object base, Object property) Attempts to resolve the given property object on the given base object.
Object	CompositeELResolver.getValue(ELContext context, Object base, Object property) Attempts to resolve the given property object on the given base object by querying all component resolvers.
Object	BeanELResolver.getValue(ELContext context, Object base, Object property) If the base object is not null, returns the current value of the given property on this bean.
Object	ArrayELResolver.getValue(ELContext context, Object base, Object property) If the base object is a Java language array, returns the value at the given index.
ValueReference	ValueExpression.getValueReference(ELContext context) Returns a ValueReference for this expression instance.
abstract Object	MethodExpression.invoke(ELContext context, Object[] params) If a String literal is specified as the expression, returns the String literal coerced to the expected return type of the method signature.
Object	ELResolver.invoke(ELContext context, Object base, Object method, Class<?>[] paramTypes, Object[] params) Attemps to resolve and invoke the given method on the given base object.
Object	CompositeELResolver.invoke(ELContext context, Object base, Object method, Class<?>[] paramTypes, Object[] params) Attemps to resolve and invoke the given method on the given base object by querying all component resolvers.
Object	BeanELResolver.invoke(ELContext context, Object base, Object method, Class<?>[] paramTypes, Object[] params) If the base object is not null, invoke the method, with the given parameters on this bean.
abstract boolean	ValueExpression.isReadOnly(ELContext context) Evaluates the expression relative to the provided context, and returns true if a call to ValueExpression.setValue(javax.el.ELContext, java.lang.Object) will always fail.
boolean	ResourceBundleELResolver.isReadOnly(ELContext context, Object base, Object property) If the base object is not null and an instanceof ResourceBundle, return true.
boolean	MapELResolver.isReadOnly(ELContext context, Object base, Object property) If the base object is a map, returns whether a call to MapELResolver.setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object) will always fail.
boolean	ListELResolver.isReadOnly(ELContext context, Object base, Object property) If the base object is a list, returns whether a call to ListELResolver.setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object) will always fail.
abstract boolean	ELResolver.isReadOnly(ELContext context, Object base, Object property) For a given base and property, attempts to determine whether a call to ELResolver.setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object) will always fail.
boolean	CompositeELResolver.isReadOnly(ELContext context, Object base, Object property) For a given base and property, attempts to determine whether a call to CompositeELResolver.setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object) will always fail.
boolean	BeanELResolver.isReadOnly(ELContext context, Object base, Object property) If the base object is not null, returns whether a call to BeanELResolver.setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object) will always fail.
boolean	ArrayELResolver.isReadOnly(ELContext context, Object base, Object property) If the base object is a Java language array, returns whether a call to ArrayELResolver.setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object) will always fail.
abstract void	ValueExpression.setValue(ELContext context, Object value) Evaluates the expression relative to the provided context, and sets the result to the provided value.
void	ResourceBundleELResolver.setValue(ELContext context, Object base, Object property, Object value) If the base object is a ResourceBundle, throw a PropertyNotWritableException.
void	MapELResolver.setValue(ELContext context, Object base, Object property, Object val) If the base object is a map, attempts to set the value associated with the given key, as specified by the property argument.
void	ListELResolver.setValue(ELContext context, Object base, Object property, Object val) If the base object is a list, attempts to set the value at the given index with the given value.
abstract void	ELResolver.setValue(ELContext context, Object base, Object property, Object value) Attempts to set the value of the given property object on the given base object.
void	CompositeELResolver.setValue(ELContext context, Object base, Object property, Object val) Attempts to set the value of the given property object on the given base object.
void	BeanELResolver.setValue(ELContext context, Object base, Object property, Object val) If the base object is not null, attempts to set the value of the given property on this bean.
void	ArrayELResolver.setValue(ELContext context, Object base, Object property, Object val) If the base object is a Java language array, attempts to set the value at the given index with the given value.

参数类型为 ELContext 的 javax.el 中的构造方法

ELContextEvent(ELContext source)
Constructs an ELContextEvent object to indicate that an ELContext has been created.

javax.servlet.jsp 中 ELContext 的使用

返回 ELContext 的 javax.servlet.jsp 中的方法

abstract ELContext

JspContext.getELContext() Returns the ELContext associated with this JspContext.

javax.servlet.jsp.el 中 ELContext 的使用

参数类型为 ELContext 的 javax.servlet.jsp.el 中的方法

Class<String>	ScopedAttributeELResolver.getCommonPropertyType(ELContext context, Object base) If the base object is null, returns String.class.
Class<String>	ImplicitObjectELResolver.getCommonPropertyType(ELContext context, Object base) If the base object is null, returns String.class.
Iterator<FeatureDescriptor>	ScopedAttributeELResolver.getFeatureDescriptors(ELContext context, Object base) If the base object is null, returns an Iterator containing FeatureDescriptor objects with information about each scoped attribute resolved by this resolver.
Iterator<FeatureDescriptor>	ImplicitObjectELResolver.getFeatureDescriptors(ELContext context, Object base) If the base object is null, and the property matches the name of a JSP implicit object, returns an Iterator containing FeatureDescriptor objects with information about each JSP implicit object resolved by this resolver.
Class<Object>	ScopedAttributeELResolver.getType(ELContext context, Object base, Object property) If the base object is null, returns Object.class to indicate that any type is valid to set for a scoped attribute.
Class	ImplicitObjectELResolver.getType(ELContext context, Object base, Object property) If the base object is null, and the property matches the name of a JSP implicit object, returns null to indicate that no types are ever accepted to setValue().
Object	ScopedAttributeELResolver.getValue(ELContext context, Object base, Object property) If the base object is null, searches the page, request, session and application scopes for an attribute with the given name and returns it, or null if no attribute exists with the current name.
Object	ImplicitObjectELResolver.getValue(ELContext context, Object base, Object property) If the base object is null, and the property matches the name of a JSP implicit object, returns the implicit object.
boolean	ScopedAttributeELResolver.isReadOnly(ELContext context, Object base, Object property) If the base object is null, returns false to indicate that scoped attributes are never read-only.
boolean	ImplicitObjectELResolver.isReadOnly(ELContext context, Object base, Object property) If the base object is null, and the property matches the name of a JSP implicit object, returns true to indicate that implicit objects cannot be overwritten.
void	ScopedAttributeELResolver.setValue(ELContext context, Object base, Object property, Object val) If the base object is null, sets an existing scoped attribute to the new value, or creates a new scoped attribute if one does not exist by this name.
void	ImplicitObjectELResolver.setValue(ELContext context, Object base, Object property, Object val) If the base object is null, and the property matches the name of a JSP implicit object, throws PropertyNotWritableException to indicate that implicit objects cannot be overwritten.

org.apache.jasper.runtime 中 ELContext 的使用

org.apache.jasper.runtime 中 ELContext 的子类

class

ELContextImpl Concrete implementation of ELContext.

返回 ELContext 的 org.apache.jasper.runtime 中的方法

protected ELContext	JspApplicationContextImpl.createELContext(ELResolver resolver)
ELContext	PageContextImpl.getELContext()
ELContext	JspContextWrapper.getELContext()