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/*
 * Copyright (C) 2008 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.inject.internal;

import com.google.inject.spi.DefaultElementVisitor;
import com.google.inject.spi.Element;
import java.util.Iterator;
import java.util.List;

/**
 * Abstract base class for creating an injector from module elements.
 *
 * 

Extending classes must return {@code true} from any overridden {@code visit*()} methods, in * order for the element processor to remove the handled element. * * @author [email protected] (Jesse Wilson) */ abstract class AbstractProcessor extends DefaultElementVisitor { protected Errors errors; protected InjectorImpl injector; protected AbstractProcessor(Errors errors) { this.errors = errors; } public void process(Iterable isolatedInjectorBuilders) { for (InjectorShell injectorShell : isolatedInjectorBuilders) { process(injectorShell.getInjector(), injectorShell.getElements()); } } public void process(InjectorImpl injector, List elements) { Errors errorsAnyElement = this.errors; this.injector = injector; try { for (Iterator i = elements.iterator(); i.hasNext(); ) { Element element = i.next(); this.errors = errorsAnyElement.withSource(element.getSource()); Boolean allDone = element.acceptVisitor(this); if (allDone) { i.remove(); } } } finally { this.errors = errorsAnyElement; this.injector = null; } } @Override protected Boolean visitOther(Element element) { return false; } }





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