content: /*
   * 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 mf.org.apache.xerces.impl.xs.util;
  
  import java.lang.reflect.Array;
  import java.util.AbstractList;
  import java.util.Vector;
  
  import mf.org.apache.xerces.xs.StringList;
  
  /**
   * Contains a list of Strings.
   *
   * @author Sandy Gao, IBM
   * @version $Id: StringListImpl.java 776326 2009-05-19 14:27:24Z mrglavas $
   * @xerces.internal
   */
  public final class StringListImpl extends AbstractList implements StringList {
  
      /**
       * An immutable empty list.
       */
      public static final StringListImpl EMPTY_LIST = new StringListImpl(new String[0], 0);
  
      // The array to hold all data
      private final String[] fArray;
      // Number of elements in this list
      private final int fLength;
  
      // REVISIT: this is temp solution. In general we need to use this class
      //          instead of the Vector.
      private final Vector fVector;
  
      public StringListImpl(Vector v) {
          fVector = v;
          fLength = (v == null) ? 0 : v.size();
          fArray = null;
      }
  
      /**
       * Construct an XSObjectList implementation
       *
       * @param array  the data array
       * @param length the number of elements
       */
      public StringListImpl(String[] array, int length) {
          fArray = array;
          fLength = length;
          fVector = null;
      }
  
      /**
       * The number of <code>Objects</code> in the list. The range of valid
       * child node indices is 0 to <code>length-1</code> inclusive.
       */
      @Override
      public int getLength() {
          return fLength;
      }
  
      /**
       * Checks if the <code>GenericString</code> <code>item</code> is a member
       * of this list.
       *
       * @param item <code>GenericString</code> whose presence in this list is
       *             to be tested.
       * @return True if this list contains the <code>GenericString</code>
       * <code>item</code>.
       */
      @Override
      public boolean contains(String item) {
          if (fVector != null) {
              return fVector.contains(item);
          }
          if (item == null) {
              for (int i = 0; i < fLength; i++) {
                  if (fArray[i] == null)
                      return true;
              }
          } else {
              for (int i = 0; i < fLength; i++) {
                  if (item.equals(fArray[i]))
                      return true;
              }
          }
          return false;
      }
  
      @Override
      public String item(int index) {
          if (index < 0 || index >= fLength) {
              return null;
          }
          if (fVector != null) {
              return (String) fVector.elementAt(index);
          }
          return fArray[index];
      }
      
      /*
       * List methods
       */
  
      @Override
      public Object get(int index) {
          if (index >= 0 && index < fLength) {
              if (fVector != null) {
                  return fVector.elementAt(index);
              }
              return fArray[index];
          }
          throw new IndexOutOfBoundsException("Index: " + index);
      }
  
      @Override
      public int size() {
          return getLength();
      }
  
      @Override
      public Object[] toArray() {
          if (fVector != null) {
              return fVector.toArray();
          }
          Object[] a = new Object[fLength];
          toArray0(a);
          return a;
      }
  
      @Override
      public Object[] toArray(Object[] a) {
          if (fVector != null) {
              return fVector.toArray(a);
          }
          if (a.length < fLength) {
              Class arrayClass = a.getClass();
              Class componentType = arrayClass.getComponentType();
              a = (Object[]) Array.newInstance(componentType, fLength);
          }
          toArray0(a);
          if (a.length > fLength) {
              a[fLength] = null;
          }
          return a;
      }
  
      private void toArray0(Object[] a) {
          if (fLength > 0) {
              System.arraycopy(fArray, 0, a, 0, fLength);
          }
      }
  
  } // class StringListImpl
  