/*
 * 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.aries.blueprint.parser;

import java.net.URI;
import java.util.Collections;
import java.util.Set;

import org.apache.aries.blueprint.ComponentDefinitionRegistry;
import org.apache.aries.blueprint.NamespaceHandler;
import org.apache.aries.blueprint.ParserContext;
import org.apache.aries.blueprint.reflect.MetadataUtil;
import org.osgi.service.blueprint.reflect.ComponentMetadata;
import org.osgi.service.blueprint.reflect.Metadata;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * A simple ParserContext implementation.
 * 
 * This class is supposed to be short lived and only used for calling a given namespace handler.
 *
 * @version $Rev: 896324 $, $Date: 2010-01-06 06:05:04 +0000 (Wed, 06 Jan 2010) $
 */
public class ParserContextImpl implements ParserContext {    
    private final Parser parser;
    private final ComponentDefinitionRegistry componentDefinitionRegistry;
    private final ComponentMetadata enclosingComponent;
    private final Node sourceNode;

    public ParserContextImpl(Parser parser,
                             ComponentDefinitionRegistry componentDefinitionRegistry,
                             ComponentMetadata enclosingComponent,
                             Node sourceNode) {
        this.parser = parser;
        this.componentDefinitionRegistry = componentDefinitionRegistry;
        this.enclosingComponent = enclosingComponent;
        this.sourceNode = sourceNode;
    }

    public ComponentDefinitionRegistry getComponentDefinitionRegistry() {
        return componentDefinitionRegistry;
    }

    public ComponentMetadata getEnclosingComponent() {
        return enclosingComponent;
    }

    public Node getSourceNode() {
        return sourceNode;
    }

    public <T extends Metadata> T createMetadata(Class<T> type) {
        return MetadataUtil.createMetadata(type);
    }

    public <T> T parseElement(Class<T> type, ComponentMetadata enclosingComponent, Element element) {
        return parser.parseElement(type, enclosingComponent, element);
    }
    
    public Parser getParser() {
        return parser;
    }
    
    public String generateId() {
        return parser.generateId();
    }

    public String getDefaultActivation() {
        return parser.getDefaultActivation();
    }

    public String getDefaultAvailability() {
        return parser.getDefaultAvailability();
    }

    public String getDefaultTimeout() {
        return parser.getDefaultTimeout();
    }

    @Override
    public Set<URI> getNamespaces() {
        return Collections.unmodifiableSet(parser.getNamespaces());
    }

    @Override
    public NamespaceHandler getNamespaceHandler(URI namespaceUri) {
        return parser.getNamespaceHandler(namespaceUri);
    }
}