Android Open Source - pulltorefresh_library_with_Indexable_listView Pull To Refresh Config Xml Parser

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The source code is released under:

Apache License

Java Source Code

/*******************************************************************************
 * Copyright 2013 Naver Business Platform Corp.
 * /*from  w  w  w  . java  2  s. c  o m*/
 * 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 com.handmark.pulltorefresh.configuration.xml;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import com.handmark.pulltorefresh.library.internal.Assert;
/**
 * {@code PullToRefreshConfigXmlParser} does parsing pulltorefresh.xml as {@code XmlPullNode}s
 * @author Wonjun Kim
 */
final class PullToRefreshConfigXmlParser extends XmlPullNodeParser<PullToRefreshNode> {
  /**
   * Repetition limit is only one
   */ 
  private static final int ONLY_ONE_REPEAT = 1;
  /**
   * Parsed data
   */
  private PullToRefreshResult result;
  /**
   * @param parser Must be not null 
   */
  public PullToRefreshConfigXmlParser(XmlPullParserWrapper parser) {
    super(parser);
  }
  /**
   * Generate a node tree matched by pulltorefresh.xml
   * @return root node of a tree
   */
  private XmlPullNode init() {
    // prepare a result instance
    result = new PullToRefreshResult();
    // make nodes 
    XmlPullNode root = new XmlPullNode("PullToRefresh");
    XmlPullNode loadingLayouts = new XmlPullNode("LoadingLayouts");
    XmlPullNode indicatorLayouts = new XmlPullNode("IndicatorLayouts");
    XmlPullNode googleStyleViewLayouts = new XmlPullNode("GoogleStyleViewLayouts");
    XmlPullNode googleStyleProgressLayouts = new XmlPullNode("GoogleStyleProgressLayouts");
    XmlPullNode loadingLayout = new XmlPullNode("layout",new LayoutNodeCallback(result.loadingLayoutClazzNameMap));
    XmlPullNode indicatorLayout = new XmlPullNode("layout",new LayoutNodeCallback(result.indicatorLayoutClazzNameMap));
    XmlPullNode googleStyleViewLayout = new XmlPullNode("layout",new LayoutNodeCallback(result.googleStyleViewLayoutClazzNameMap));
    XmlPullNode googleStyleProgressLayout = new XmlPullNode("layout",new LayoutNodeCallback(result.googleStyleProgressLayoutClazzNameMap));
    // make a tree structure
    root.addChildNode(loadingLayouts, ONLY_ONE_REPEAT);
    root.addChildNode(indicatorLayouts, ONLY_ONE_REPEAT);
    root.addChildNode(googleStyleViewLayouts, ONLY_ONE_REPEAT);
    root.addChildNode(googleStyleProgressLayouts, ONLY_ONE_REPEAT);
    loadingLayouts.addChildNode(loadingLayout);
    indicatorLayouts.addChildNode(indicatorLayout);
    googleStyleViewLayouts.addChildNode(googleStyleViewLayout);
    googleStyleProgressLayouts.addChildNode(googleStyleProgressLayout);
    // return root node
    return root;
  }
  /**
   * @return root node of a tree
   */
  @Override
  protected XmlPullNode generateRootNode() {
    return init();
  }
  /**
   *  @return Parsed result data as {@code PullToRefreshNode} instance  
   */
  @Override
  protected PullToRefreshNode getResult() {
    return new PullToRefreshNode(result.loadingLayoutClazzNameMap, result.indicatorLayoutClazzNameMap, result.googleStyleViewLayoutClazzNameMap, result.googleStyleProgressLayoutClazzNameMap);
  }
  /**
   * Parsed Result to be sent to {@code PullToRefreshNode}
   * @author Wonjun Kim
   *
   */
  private static class PullToRefreshResult {
    public final Map<String, String> loadingLayoutClazzNameMap = new HashMap<String, String>();
    public final Map<String, String> indicatorLayoutClazzNameMap = new HashMap<String, String>();
    public final Map<String, String> googleStyleViewLayoutClazzNameMap = new HashMap<String, String>();
    public final Map<String, String> googleStyleProgressLayoutClazzNameMap = new HashMap<String, String>();
  }
    
  /**
   * Callback of the node 'PullToRefresh/IndicatorLayouts/layout' and 'PullToRefresh/LoadingLayouts/layout' 
   * @author Wonjun Kim
   *
   */
  private static class LayoutNodeCallback implements XmlPullNode.XmlPullNodeCallback {
    /**
     * {@code Map} storing Layouts' information 
     */
    private Map<String, String> layoutClazzNameMap;
    /**
     * @param layoutClazzNameMap Must not be null and be clean for which put new values
     */
    public LayoutNodeCallback(Map<String, String> layoutClazzNameMap) {
      Assert.notNull(layoutClazzNameMap, "Class Map");
      this.layoutClazzNameMap = layoutClazzNameMap;
    }
    /**
     * Be called when parser has found 'layout' node at a time
     */
    @Override
    public void process(XmlPullParser parser) throws XmlPullParserException, IOException {

      int attributesCount = parser.getAttributeCount();
      String attributeName, attributeValue;
      // Iterate attributes!      
      for (int i = 0; i < attributesCount; ++i) {
        attributeName = parser.getAttributeName(i);
        attributeValue = parser.getAttributeValue(i);
        // The 'name' attribute is as a layout code of each layout's class  
        if ( "name".equals(attributeName)) {
          // Skip if attribute value is null or empty 
          if ( attributeValue == null || attributeValue.length() == 0 ) {
            continue;
          }
          
          // Get layout's class name
          String clazzName = parser.nextText();
          
          // Insert new class name 
          layoutClazzNameMap.put(attributeValue, clazzName);

          // Do 'break' because nextText() method has been called
          break;
        }
      }
    }
  }
}

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