javax.el

Class ExpressionFactory

java.lang.Object

javax.el.ExpressionFactory

Direct Known Subclasses:

ExpressionFactoryImpl

public abstract class ExpressionFactory
extends Object

Since:

2.1

Constructor Summary

Constructors

Constructor and Description
ExpressionFactory()

Method Summary

Methods

Modifier and Type	Method and Description
abstract Object	coerceToType(Object obj, Class<?> expectedType)
abstract MethodExpression	createMethodExpression(ELContext context, String expression, Class<?> expectedReturnType, Class<?>[] expectedParamTypes)
abstract ValueExpression	createValueExpression(ELContext context, String expression, Class<?> expectedType)
abstract ValueExpression	createValueExpression(Object instance, Class<?> expectedType)
Map<String,Method>	getInitFunctionMap()
ELResolver	getStreamELResolver()
static ExpressionFactory	newInstance() Create a new ExpressionFactory.
static ExpressionFactory	newInstance(Properties properties) Create a new ExpressionFactory passing in the provided Properties.

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

newInstance

public static ExpressionFactory newInstance()

Create a new ExpressionFactory. The class to use is determined by the following search order:

1. services API (META-INF/services/javax.el.ExpressionFactory)
2. $JRE_HOME/lib/el.properties - key javax.el.ExpressionFactory
3. javax.el.ExpressionFactory
4. Platform default implementation - org.apache.el.ExpressionFactoryImpl

Returns:

the new ExpressionFactory

newInstance

public static ExpressionFactory newInstance(Properties properties)

Create a new ExpressionFactory passing in the provided Properties. Search order is the same as newInstance().

Parameters:

properties - the properties to be passed to the new instance (may be null)

Returns:

the new ExpressionFactory

createValueExpression

public abstract ValueExpression createValueExpression(ELContext context,
                                    String expression,
                                    Class<?> expectedType)

Throws:

NullPointerException - If the expected type is null

ELException - If there are syntax errors in the provided expression

createValueExpression

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

createMethodExpression

public abstract MethodExpression createMethodExpression(ELContext context,
                                      String expression,
                                      Class<?> expectedReturnType,
                                      Class<?>[] expectedParamTypes)

Throws:

NullPointerException - If the expected parameters types are null

ELException - If there are syntax errors in the provided expression

coerceToType

public abstract Object coerceToType(Object obj,
                  Class<?> expectedType)

Throws:

ELException - If the conversion fails

getStreamELResolver

public ELResolver getStreamELResolver()

Since:

EL 3.0

getInitFunctionMap

public Map<String,Method> getInitFunctionMap()

Since:

EL 3.0