org.zkoss.zel
Class ExpressionFactory

java.lang.Object
  org.zkoss.zel.ExpressionFactory

Direct Known Subclasses:

ExpressionFactoryImpl

public abstract class ExpressionFactory
extends java.lang.Object

Since:

2.1

Constructor Summary

ExpressionFactory()

Method Summary

abstract java.lang.Object	coerceToType(java.lang.Object obj, java.lang.Class<?> expectedType)
abstract MethodExpression	createMethodExpression(ELContext context, java.lang.String expression, java.lang.Class<?> expectedReturnType, java.lang.Class<?>[] expectedParamTypes)
abstract ValueExpression	createValueExpression(ELContext context, java.lang.String expression, java.lang.Class<?> expectedType)
abstract ValueExpression	createValueExpression(java.lang.Object instance, java.lang.Class<?> expectedType)
static ExpressionFactory	newInstance() Create a new ExpressionFactory.
static ExpressionFactory	newInstance(java.util.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

coerceToType

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

Throws:

ELException

createValueExpression

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

Throws:

java.lang.NullPointerException

ELException

createValueExpression

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

createMethodExpression

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

Throws:

ELException

java.lang.NullPointerException

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/org.zkoss.zel.ExpressionFactory)
2. $JRE_HOME/lib/el.properties - key org.zkoss.zel.ExpressionFactory
3. org.zkoss.zel.ExpressionFactory
4. Platform default implementation - org.zkoss.zel.impl.ExpressionFactoryImpl

Returns:

the new ExpressionFactory

newInstance

public static ExpressionFactory newInstance(java.util.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