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/*
 * Copyright 2004-2008 Andy Clark, Marc Guillemot
 *
 * 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 net.sourceforge.htmlunit.cyberneko;

import java.util.Enumeration;
import java.util.Hashtable;

import org.apache.xerces.xni.Augmentations;

/**
 * This class is here to overcome the XNI changes to the
 * Augmentations interface. In early versions of XNI, the
 * augmentations interface contained a clear() method to
 * remove all of the items from the augmentations instance. A later
 * version of XNI changed this method to removeAllItems().
 * Therefore, this class extends the augmentations interface and
 * explicitly implements both of these methods.
 * 

* Note: * This code is inspired by performance enhancements submitted by * Marc-André Morissette. * * @author Andy Clark */ public class HTMLAugmentations implements Augmentations { // // Data // /** Augmentation items. */ protected final Hashtable fItems = new Hashtable<>(); // // Public methods // public HTMLAugmentations() { // nothing } /** * Copy constructor * @param augs the object to copy */ HTMLAugmentations(final Augmentations augs) { for (final Enumeration keys = augs.keys(); keys.hasMoreElements(); ) { final String key = keys.nextElement(); Object value = augs.getItem(key); if (value instanceof HTMLScanner.LocationItem) { value = new HTMLScanner.LocationItem((HTMLScanner.LocationItem) value); } fItems.put(key, value); } } // since Xerces 2.3.0 /** Removes all of the elements in this augmentations object. */ @Override public void removeAllItems() { fItems.clear(); } // from Xerces 2.0.0 (beta4) until 2.3.0 /** Removes all of the elements in this augmentations object. */ public void clear() { fItems.clear(); } // // Augmentations methods // /** * Add additional information identified by a key to the Augmentations * structure. * * @param key Identifier, can't be null * @param item Additional information * * @return The previous value of the specified key in the Augmentations * structure, or null if it did not have one. */ @Override public Object putItem(String key, Object item) { return fItems.put(key, item); } /** * Get information identified by a key from the Augmentations structure. * * @param key Identifier, can't be null * * @return The value to which the key is mapped in the Augmentations * structure; null if the key is not mapped to any * value. */ @Override public Object getItem(String key) { return fItems.get(key); } /** * Remove additional info from the Augmentations structure * * @param key Identifier, can't be null * @return The previous value of the specified key in the Augmentations * structure, or null if it did not have one. */ @Override public Object removeItem(String key) { return fItems.remove(key); } /** * Returns an enumeration of the keys in the Augmentations structure. */ @Override public Enumeration keys() { return fItems.keys(); } }





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