/*

  * Copyright 2004-2008 the Seasar Foundation and the Others.

  *

  * 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 org.seasar.uruma.context.impl;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import org.seasar.uruma.context.WidgetHandle;

 import org.seasar.uruma.context.WidgetHolder;

 import org.seasar.uruma.core.UrumaMessageCodes;

 import org.seasar.uruma.exception.DuplicateWidgetIdException;

 import org.seasar.uruma.log.UrumaLogger;

 import org.seasar.uruma.util.AssertionUtil;

 /**

  * {@link WidgetHolder} の実装クラスです。<br />

  * 

  * @author y-komori

  */

 public abstract class AbstractWidgetHolder implements WidgetHolder {

     private static final UrumaLogger logger = UrumaLogger

             .getLogger(AbstractWidgetHolder.class);

     private Map<String, WidgetHandle> handleMap = new HashMap<String, WidgetHandle>();

     /*

      * @see

      * org.seasar.uruma.context.WidgetHolder#getWidgetHandle(java.lang.String)

      */

     public WidgetHandle getWidgetHandle(final String handleId) {

         return handleMap.get(handleId);

     }

     /*

      * @see org.seasar.uruma.context.WidgetHolder#getWidgetHandles()

      */

     public Collection<WidgetHandle> getWidgetHandles() {

         return Collections.unmodifiableCollection(handleMap.values());

     }

     /*

      * @see

      * org.seasar.uruma.context.WidgetHolder#hasWidgetHandle(java.lang.String)

      */

     public boolean hasWidgetHandle(final String handleId) {

         return handleMap.containsKey(handleId);

     }

     /*

      * @see

      * org.seasar.uruma.context.WidgetHolder#putWidgetHandle(org.seasar.uruma

      * .context.WidgetHandle)

      */

     public void putWidgetHandle(final WidgetHandle handle) {

         AssertionUtil.assertNotNull("handle", handle);

         if (hasWidgetHandle(handle.getId())) {

             throw new DuplicateWidgetIdException(handle.getId(), handle

                     .getWidgetClass().getName());

         }

         logger.log(UrumaMessageCodes.WIDGET_REGISTERED, handle.getId(), handle

                 .getWidgetClass().getName());

         handleMap.put(handle.getId(), handle);

     }

     /*

      * @see

      * org.seasar.uruma.context.WidgetHolder#getWidgetHandles(java.lang.Class)

      */

     public List<WidgetHandle> getWidgetHandles(final Class<?> clazz) {

         List<WidgetHandle> handles = new ArrayList<WidgetHandle>();

         for (WidgetHandle handle : handleMap.values()) {

             if (handle.instanceOf(clazz)) {

                 handles.add(handle);

             }

         }

         return handles;

     }

 }