javax.el

Class ExpressionFactory

java.lang.Object

javax.el.ExpressionFactory

public abstract class ExpressionFactory
extends java.lang.Object

Parser that can parse strings into expressions for evaluation.

Since:

2.1

Constructor Summary

Constructors

Constructor and Description
ExpressionFactory()

Method Summary

Methods

Modifier and Type	Method and Description
abstract java.lang.Object	coerceToType(java.lang.Object obj, java.lang.Class<?> targetType) Coerces an object to a specific type according to the type conversion rules.
abstract MethodExpression	createMethodExpression(ELContext context, java.lang.String expression, java.lang.Class<?> expectedReturnType, java.lang.Class<?>[] expectedParamTypes) Parses an expression into a MethodExpression.
abstract ValueExpression	createValueExpression(ELContext context, java.lang.String expression, java.lang.Class<?> expectedType) Parses an expression into a ValueExpression.
abstract ValueExpression	createValueExpression(java.lang.Object instance, java.lang.Class<?> expectedType) Creates a ValueExpression that wraps an object.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionFactory

public ExpressionFactory()

Method Detail

createValueExpression

public abstract ValueExpression createValueExpression(ELContext context,
                                    java.lang.String expression,
                                    java.lang.Class<?> expectedType)
                                               throws java.lang.NullPointerException,
                                                      ELException

Parses an expression into a ValueExpression.

Throws:

java.lang.NullPointerException

ELException

createValueExpression

public abstract ValueExpression createValueExpression(java.lang.Object instance,
                                    java.lang.Class<?> expectedType)

Creates a ValueExpression that wraps an object.

createMethodExpression

public abstract MethodExpression createMethodExpression(ELContext context,
                                      java.lang.String expression,
                                      java.lang.Class<?> expectedReturnType,
                                      java.lang.Class<?>[] expectedParamTypes)
                                                 throws java.lang.NullPointerException,
                                                        ELException

Parses an expression into a MethodExpression.

Throws:

java.lang.NullPointerException

ELException

coerceToType

public abstract java.lang.Object coerceToType(java.lang.Object obj,
                            java.lang.Class<?> targetType)
                                       throws ELException

Coerces an object to a specific type according to the type conversion rules.

Throws:

ELException