ipojo/runtime/core/src/main/java/org/apache/felix/ipojo/architecture/HandlerDescription.java

/* 
 * 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.architecture;

import org.apache.felix.ipojo.Handler;
import org.apache.felix.ipojo.HandlerFactory;
import org.apache.felix.ipojo.metadata.Attribute;
import org.apache.felix.ipojo.metadata.Element;

/**
 * Handler Description.
 * 
 * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a>
 */
public class HandlerDescription {

    /**
     * The Handler Qualified Name.
     */
    private String m_handlerName;


    /**
     * The described handler instance.
     */
    private Handler m_handler;

    /**
     * Creates a handler description.
     * @param handler the handler.
     */
    public HandlerDescription(Handler handler) {
        HandlerFactory factory = (HandlerFactory) handler.getHandlerManager().getFactory();
        m_handlerName = factory.getHandlerName();
        m_handler = handler;
    }

    /**
     * Checks if the handler is valid.
     * @return true if the handler is valid.
     */
    public boolean isValid() {
        return m_handler.isValid();
    }

    /**
     * Gets the handler name.
     * @return the handler qualified name (i.e. namespace:name).
     */
    public String getHandlerName() {
        return m_handlerName;
    }

    /**
     * Gets handler information.
     * This represent the actual state of the handler.
     * @return the handler information.
     */
    public Element getHandlerInfo() {
        Element elem = new Element("Handler", "");
        elem.addAttribute(new Attribute("name", m_handlerName));
        if (isValid()) {
            elem.addAttribute(new Attribute("state", "valid"));
        } else {
            elem.addAttribute(new Attribute("state", "invalid"));
        }
        return elem;
    }

}