- java.lang.Object
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- javax.management.openmbean.CompositeDataInvocationHandler
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- All Implemented Interfaces:
InvocationHandler
public class CompositeDataInvocationHandler extends Object implements InvocationHandler
An
InvocationHandlerthat forwards getter methods to aCompositeData. If you have an interface that contains only getter methods (such asString getName()orboolean isActive()) then you can use this class in conjunction with theProxyclass to produce an implementation of the interface where each getter returns the value of the corresponding item in aCompositeData.For example, suppose you have an interface like this:
and apublic interface NamedNumber { public int getNumber(); public String getName(); }CompositeDataconstructed like this:
then you can construct an object implementingCompositeData cd = newCompositeDataSupport( someCompositeType, new String[] {"number", "name"}, new Object[] {5, "five"} );NamedNumberand backed by the objectcdlike this:
A call toInvocationHandler handler = new CompositeDataInvocationHandler(cd); NamedNumber nn = (NamedNumber) Proxy.newProxyInstance(NamedNumber.class.getClassLoader(), new Class[] {NamedNumber.class}, handler);nn.getNumber()will then return 5.If the first letter of the property defined by a getter is a capital, then this handler will look first for an item in the
CompositeDatabeginning with a capital, then, if that is not found, for an item beginning with the corresponding lowercase letter or code point. For a getter calledgetNumber(), the handler will first look for an item calledNumber, then fornumber. If the getter is calledgetnumber(), then the item must be callednumber.If the method given to
invokeis the methodboolean equals(Object)inherited fromObject, then it will return true if and only if the argument is aProxywhoseInvocationHandleris also aCompositeDataInvocationHandlerand whose backingCompositeDatais equal (not necessarily identical) to this object's. If the method given toinvokeis the methodint hashCode()inherited fromObject, then it will return a value that is consistent with this definition ofequals: if two objects are equal according toequals, then they will have the samehashCode.- Since:
- 1.6
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Constructor Summary
Constructors Constructor Description CompositeDataInvocationHandler(CompositeData compositeData)Construct a handler backed by the givenCompositeData.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description CompositeDatagetCompositeData()Return theCompositeDatathat was supplied to the constructor.-
Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods declared in interface java.lang.reflect.InvocationHandler
invoke
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Constructor Detail
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CompositeDataInvocationHandler
public CompositeDataInvocationHandler(CompositeData compositeData)
Construct a handler backed by the given
CompositeData.- Parameters:
compositeData- theCompositeDatathat will supply information to getters.- Throws:
IllegalArgumentException- ifcompositeDatais null.
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Method Detail
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getCompositeData
public CompositeData getCompositeData()
Return theCompositeDatathat was supplied to the constructor.- Returns:
- the
CompositeDatathat this handler is backed by. This is never null.
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