Package org.camunda.bpm.engine.impl.el

Class JuelExpressionManager

java.lang.Object

org.camunda.bpm.engine.impl.el.JuelExpressionManager

All Implemented Interfaces:

ElProviderCompatible, ExpressionManager

Direct Known Subclasses:

CdiExpressionManager, MockExpressionManager, SpringExpressionManager

public class JuelExpressionManager
extends Object
implements ExpressionManager, ElProviderCompatible

JUEL-specific implementation of an ExpressionManager.

Author:

Tom Baeyens, Dave Syer, Frederik Heremans

Field Summary

Fields

Modifier and Type	Field	Description
protected Map<Object,Object>	beans
protected ElProvider	elProvider
protected ELResolver	elResolver
protected ExpressionFactory	expressionFactory
protected FunctionMapper	functionMapper
protected Map<String,Method>	functions
protected boolean	initialized
protected ELContext	parsingElContext

Constructor Summary

Constructors

Constructor	Description
JuelExpressionManager()
JuelExpressionManager(Map<Object,Object> beans)

Method Summary

Modifier and Type	Method	Description
void	addFunction(String name, Method function)	Adds a custom function to the expression manager that can be used in expression evaluation later on.
protected ProcessEngineElContext	createElContext(VariableScope variableScope)
ELContext	createElContext(VariableContext variableContext)
protected ElProvider	createElProvider()
protected ELResolver	createElResolver()
Expression	createExpression(String expression)
protected FunctionMapper	createFunctionMapper()
ValueExpression	createValueExpression(String expression)
protected void	ensureInitialized()
ELContext	getElContext(VariableScope variableScope)
void	setExpressionFactory(ExpressionFactory expressionFactory)
ElProvider	toElProvider()

Methods inherited from class java.lang.Object

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

Field Detail

functions

protected Map<String,Method> functions

expressionFactory

protected ExpressionFactory expressionFactory

beans

protected Map<Object,Object> beans

initialized

protected volatile boolean initialized

elResolver

protected ELResolver elResolver

functionMapper

protected FunctionMapper functionMapper

parsingElContext

protected ELContext parsingElContext

elProvider

protected volatile ElProvider elProvider

Constructor Detail

JuelExpressionManager

public JuelExpressionManager()

JuelExpressionManager

public JuelExpressionManager(Map<Object,Object> beans)

Method Detail

createExpression

public Expression createExpression(String expression)

Specified by:

createExpression in interface ExpressionManager

Returns:

a parsed expression

addFunction

public void addFunction(String name,
                        Method function)

Description copied from interface: ExpressionManager

Adds a custom function to the expression manager that can be used in expression evaluation later on. Ideally, use this in the setup phase of the expression manager, i.e. before the first invocation of createExpression.

Specified by:

addFunction in interface ExpressionManager

createValueExpression

public ValueExpression createValueExpression(String expression)

setExpressionFactory

public void setExpressionFactory(ExpressionFactory expressionFactory)

getElContext

public ELContext getElContext(VariableScope variableScope)

createElContext

public ELContext createElContext(VariableContext variableContext)

createElContext

protected ProcessEngineElContext createElContext(VariableScope variableScope)

ensureInitialized

protected void ensureInitialized()

createElResolver

protected ELResolver createElResolver()

createFunctionMapper

protected FunctionMapper createFunctionMapper()

toElProvider

public ElProvider toElProvider()

Specified by:

toElProvider in interface ElProviderCompatible

Returns:

an ElProvider

createElProvider

protected ElProvider createElProvider()