| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.felix.ipojo.manipulator.metadata; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.felix.ipojo.manipulator.MetadataProvider; |
| import org.apache.felix.ipojo.manipulator.Reporter; |
| import org.apache.felix.ipojo.metadata.Element; |
| |
| /** |
| * A {@code CompositeMetadataProvider} is responsible to detect duplicates |
| * component's declaration. |
| * |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| public class CompositeMetadataProvider implements MetadataProvider { |
| |
| private List<MetadataProvider> m_providers = new ArrayList<MetadataProvider>(); |
| private Reporter m_reporter; |
| |
| public CompositeMetadataProvider(Reporter reporter) { |
| m_reporter = reporter; |
| } |
| |
| public void addMetadataProvider(MetadataProvider provider) { |
| m_providers.add(provider); |
| } |
| |
| public List<Element> getMetadatas() throws IOException { |
| List<Element> metadata = new ArrayList<Element>(); |
| for (MetadataProvider provider : m_providers) { |
| |
| List<Element> loaded = provider.getMetadatas(); |
| |
| // Analyze each newly loaded metadata |
| // And find duplicate component definition |
| |
| for (Element meta : loaded) { |
| if (isInstance(meta)) { |
| // This is an instance, just add it to the list |
| metadata.add(meta); |
| } else { |
| // Handler or Component |
| // Finds duplicate (if any) |
| String name = getComponentName(meta); |
| if (name != null) { |
| if (isDuplicate(metadata, name)) { |
| // TODO Try to add more information here, but what ? |
| m_reporter.warn("The component type " + name + " is duplicated."); |
| } else { |
| metadata.add(meta); |
| } |
| } else { |
| // no name, strange, but add it to the list |
| metadata.add(meta); |
| } |
| } |
| } |
| } |
| return metadata; |
| } |
| |
| private boolean isDuplicate(List<Element> elements, String name) { |
| for (Element element : elements) { |
| if (!isInstance(element) && name.equals(getComponentName(element))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private String getComponentName(Element element) { |
| return element.getAttribute("name"); |
| } |
| |
| private boolean isInstance(Element element) { |
| return "instance".equals(element.getName()); |
| } |
| } |