com.bstek.dorado.config

Class ExpressionMethodInterceptor

java.lang.Object

com.bstek.dorado.config.ExpressionMethodInterceptor

All Implemented Interfaces:

org.aopalliance.aop.Advice, org.aopalliance.intercept.Interceptor, org.aopalliance.intercept.MethodInterceptor

Direct Known Subclasses:

EntityExpressionMethodInterceptor

public class ExpressionMethodInterceptor
extends java.lang.Object
implements org.aopalliance.intercept.MethodInterceptor

用于实现对对象属性中EL表达式实时求值功能的方法拦截器。

Since:

Jan 14, 2008

Author:

Benny Bao (mailto:benny.bao@bstek.com)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	ExpressionMethodInterceptor.ReadMethodDescriptor

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.lang.String	ENTRY_SET
protected static java.lang.String	GET
protected java.util.Map<java.lang.reflect.Method,ExpressionMethodInterceptor.ReadMethodDescriptor>	interceptingReadMethods
protected java.util.Map<java.lang.reflect.Method,java.lang.reflect.Method>	interceptingWriteMethods
protected static java.lang.String	PUT

Constructor Summary

Constructors

Constructor and Description
ExpressionMethodInterceptor(java.util.Map<java.lang.String,Expression> expressionProperties)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	discoverInterceptingMethods(java.lang.Class<?> clazz)
protected java.lang.Object	evaluateExpression(ExpressionMethodInterceptor.ReadMethodDescriptor methodDescriptor) 根据被拦截到的方法评估(evaluate)相应的EL表达式，并返回其结果。
java.util.Map<java.lang.String,Expression>	getExpressionProperties() 返回一个包含EL表达式信息的Map。该Map的键值为属性名，值为具体的EL表达式。
java.lang.Object	invoke(org.aopalliance.intercept.MethodInvocation methodInvocation)
boolean	isDisabled() 返回该方法拦截器当前是否已被禁用。
void	setDisabled(boolean disabled) 设置该方法拦截器当前是否被禁用。

Methods inherited from class java.lang.Object

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

Field Detail

GET

protected static final java.lang.String GET

See Also:

Constant Field Values

PUT

protected static final java.lang.String PUT

See Also:

Constant Field Values

ENTRY_SET

protected static final java.lang.String ENTRY_SET

See Also:

Constant Field Values

interceptingReadMethods

protected java.util.Map<java.lang.reflect.Method,ExpressionMethodInterceptor.ReadMethodDescriptor> interceptingReadMethods

interceptingWriteMethods

protected java.util.Map<java.lang.reflect.Method,java.lang.reflect.Method> interceptingWriteMethods

Constructor Detail

ExpressionMethodInterceptor

public ExpressionMethodInterceptor(java.util.Map<java.lang.String,Expression> expressionProperties)

Parameters:

expressionProperties - 包含EL表达式信息的Map。其中Map的键值为相应的对象属性名，值为EL表达式。

Method Detail

isDisabled

public boolean isDisabled()

返回该方法拦截器当前是否已被禁用。

setDisabled

public void setDisabled(boolean disabled)

设置该方法拦截器当前是否被禁用。

getExpressionProperties

public java.util.Map<java.lang.String,Expression> getExpressionProperties()

返回一个包含EL表达式信息的Map。该Map的键值为属性名，值为具体的EL表达式。

discoverInterceptingMethods

protected void discoverInterceptingMethods(java.lang.Class<?> clazz)
                                    throws java.lang.Exception

Throws:

java.lang.Exception

evaluateExpression

protected java.lang.Object evaluateExpression(ExpressionMethodInterceptor.ReadMethodDescriptor methodDescriptor)

根据被拦截到的方法评估(evaluate)相应的EL表达式，并返回其结果。

Parameters:

methodDescriptor - 被拦截到的方法。

Returns:

EL表达式的评估结果。

invoke

public java.lang.Object invoke(org.aopalliance.intercept.MethodInvocation methodInvocation)
                        throws java.lang.Throwable

Specified by:

invoke in interface org.aopalliance.intercept.MethodInterceptor

Throws:

java.lang.Throwable