org.picocontainer.injectors.CompositeInjector Maven / Gradle / Ivy
/*****************************************************************************
* Copyright (C) PicoContainer Organization. All rights reserved. *
* ------------------------------------------------------------------------- *
* The software in this package is published under the terms of the BSD *
* style license a copy of which has been included with this distribution in *
* the LICENSE.txt file. *
* *
*****************************************************************************/
package org.picocontainer.injectors;
import org.picocontainer.ComponentMonitor;
import org.picocontainer.Injector;
import org.picocontainer.Parameter;
import org.picocontainer.PicoCompositionException;
import org.picocontainer.PicoContainer;
import org.picocontainer.PicoVisitor;
import java.lang.reflect.Type;
@SuppressWarnings("serial")
public class CompositeInjector extends AbstractInjector {
private final Injector[] injectors;
public CompositeInjector(Object componentKey, Class> componentImplementation, Parameter[] parameters, ComponentMonitor monitor,
boolean useNames, Injector... injectors) {
super(componentKey, componentImplementation, parameters, monitor, useNames);
this.injectors = injectors;
}
@Override
public T getComponentInstance(PicoContainer container) throws PicoCompositionException {
return getComponentInstance(container, NOTHING.class);
}
@Override
public T getComponentInstance(PicoContainer container, Type into) throws PicoCompositionException {
T instance = null;
for (Injector injector : injectors) {
if (instance == null) {
instance = injector.getComponentInstance(container, NOTHING.class);
} else {
injector.decorateComponentInstance(container, into, instance);
}
}
return (T) instance;
}
/**
* @return the object returned is the result of the last of the injectors delegated to
*/
@Override
public Object decorateComponentInstance(PicoContainer container, Type into, T instance) {
Object result = null;
for (Injector injector : injectors) {
result = injector.decorateComponentInstance(container, into, instance);
}
return result;
}
@Override
public void verify(PicoContainer container) throws PicoCompositionException {
for (Injector injector : injectors) {
injector.verify(container);
}
}
@Override
public final void accept(PicoVisitor visitor) {
super.accept(visitor);
for (Injector injector : injectors) {
injector.accept(visitor);
}
}
@Override
public String getDescriptor() {
return "CompositeInjector";
}
}