content: /*
   * Copyright (c) 2009-2013 Panxiaobo
   * 
   * 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 pxb.android.axml;
  
  import static pxb.android.axml.NodeVisitor.TYPE_INT_BOOLEAN;
  import static pxb.android.axml.NodeVisitor.TYPE_STRING;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.ByteOrder;
  import java.nio.IntBuffer;
  
  import pxb.android.ResConst;
  import pxb.android.StringItems;
  
  /**
   * a class to read android axml
   * 
   * @author <a href="mailto:pxb1988@gmail.com">Panxiaobo</a>
   */
  public class AxmlParser implements ResConst {
  
      public static final int END_FILE = 7;
      public static final int END_NS = 5;
      public static final int END_TAG = 3;
      public static final int START_FILE = 1;
      public static final int START_NS = 4;
      public static final int START_TAG = 2;
      public static final int TEXT = 6;
      // private int attrName[];
      // private int attrNs[];
      // private int attrResId[];
      // private int attrType[];
      // private Object attrValue[];
  
      private int attributeCount;
  
      private IntBuffer attrs;
  
      private int classAttribute;
      private int fileSize = -1;
      private int idAttribute;
      private ByteBuffer in;
      private int lineNumber;
      private int nameIdx;
      private int nsIdx;
  
      private int prefixIdx;
  
      private int[] resourceIds;
  
      private String[] strings;
  
      private int styleAttribute;
  
      private int textIdx;
  
      public AxmlParser(byte[] data) {
          this(ByteBuffer.wrap(data));
      }
  
      public AxmlParser(ByteBuffer in) {
          super();
          this.in = in.order(ByteOrder.LITTLE_ENDIAN);
      }
  
      public int getAttrCount() {
          return attributeCount;
      }
  
      public int getAttributeCount() {
          return attributeCount;
      }
  
      public String getAttrName(int i) {
          int idx = attrs.get(i * 5 + 1);
          return strings[idx];
  
      }
  
      public String getAttrNs(int i) {
          int idx = attrs.get(i * 5 + 0);
          return idx >= 0 ? strings[idx] : null;
      }
  
      String getAttrRawString(int i) {
          int idx = attrs.get(i * 5 + 2);
          if (idx >= 0) {
              return strings[idx];
          }
          return null;
      }
  
      public int getAttrResId(int i) {
          if (resourceIds != null) {
              int idx = attrs.get(i * 5 + 1);
              if (idx >= 0 && idx < resourceIds.length) {
                  return resourceIds[idx];
              }
          }
          return -1;
      }
  
      public int getAttrType(int i) {
          return attrs.get(i * 5 + 3) >> 24;
      }
  
      public Object getAttrValue(int i) {
          int v = attrs.get(i * 5 + 4);
  
          if (i == idAttribute) {
              return ValueWrapper.wrapId(v, getAttrRawString(i));
          } else if (i == styleAttribute) {
              return ValueWrapper.wrapStyle(v, getAttrRawString(i));
          } else if (i == classAttribute) {
              return ValueWrapper.wrapClass(v, getAttrRawString(i));
          }
  
          switch (getAttrType(i)) {
          case TYPE_STRING:
              return strings[v];
          case TYPE_INT_BOOLEAN:
              return v != 0;
          default:
              return v;
          }
      }
  
      public int getLineNumber() {
          return lineNumber;
      }
  
      public String getName() {
          return strings[nameIdx];
      }
  
      public String getNamespacePrefix() {
          return strings[prefixIdx];
      }
  
      public String getNamespaceUri() {
          return nsIdx >= 0 ? strings[nsIdx] : null;
      }
  
      public String getText() {
          return strings[textIdx];
      }
  
      public int next() throws IOException {
          if (fileSize < 0) {
              int type = in.getInt() & 0xFFFF;
              if (type != RES_XML_TYPE) {
                  throw new RuntimeException();
              }
              fileSize = in.getInt();
              return START_FILE;
          }
          int event = -1;
          for (int p = in.position(); p < fileSize; p = in.position()) {
              int type = in.getInt() & 0xFFFF;
              int size = in.getInt();
              switch (type) {
              case RES_XML_START_ELEMENT_TYPE: {
                  {
                      lineNumber = in.getInt();
                      in.getInt();/* skip, 0xFFFFFFFF */
                      nsIdx = in.getInt();
                      nameIdx = in.getInt();
                      int flag = in.getInt();// 0x00140014 ?
                      if (flag != 0x00140014) {
                          throw new RuntimeException();
                      }
                  }
  
                  attributeCount = in.getShort() & 0xFFFF;
                  idAttribute = (in.getShort() & 0xFFFF) - 1;
                  classAttribute = (in.getShort() & 0xFFFF) - 1;
                  styleAttribute = (in.getShort() & 0xFFFF) - 1;
  
                  attrs = in.asIntBuffer();
  
                  // attrResId = new int[attributeCount];
                  // attrName = new int[attributeCount];
                  // attrNs = new int[attributeCount];
                  // attrType = new int[attributeCount];
                  // attrValue = new Object[attributeCount];
                  // for (int i = 0; i < attributeCount; i++) {
                  // int attrNsIdx = in.getInt();
                  // int attrNameIdx = in.getInt();
                  // int raw = in.getInt();
                  // int aValueType = in.getInt() >>> 24;
                  // int aValue = in.getInt();
                  // Object value = null;
                  // switch (aValueType) {
                  // case TYPE_STRING:
                  // value = strings[aValue];
                  // break;
                  // case TYPE_INT_BOOLEAN:
                  // value = aValue != 0;
                  // break;
                  // default:
                  // value = aValue;
                  // }
                  // int resourceId = attrNameIdx < this.resourceIds.length ?
                  // resourceIds[attrNameIdx] : -1;
                  // attrNs[i] = attrNsIdx;
                  // attrName[i] = attrNameIdx;
                  // attrType[i] = aValueType;
                  // attrResId[i] = resourceId;
                  // attrValue[i] = value;
                  // }
                  event = START_TAG;
              }
                  break;
              case RES_XML_END_ELEMENT_TYPE: {
                  in.position(p + size);
                  event = END_TAG;
              }
                  break;
              case RES_XML_START_NAMESPACE_TYPE:
                  lineNumber = in.getInt();
                  in.getInt();/* 0xFFFFFFFF */
                  prefixIdx = in.getInt();
                  nsIdx = in.getInt();
                  event = START_NS;
                  break;
              case RES_XML_END_NAMESPACE_TYPE:
                  in.position(p + size);
                  event = END_NS;
                  break;
              case RES_STRING_POOL_TYPE:
                  strings = StringItems.read(in);
                  in.position(p + size);
                  continue;
              case RES_XML_RESOURCE_MAP_TYPE:
                  int count = size / 4 - 2;
                  resourceIds = new int[count];
                  for (int i = 0; i < count; i++) {
                      resourceIds[i] = in.getInt();
                  }
                  in.position(p + size);
                  continue;
              case RES_XML_CDATA_TYPE:
                  lineNumber = in.getInt();
                  in.getInt();/* 0xFFFFFFFF */
                  textIdx = in.getInt();
  
                  in.getInt();/* 00000008 00000000 */
                  in.getInt();
  
                  event = TEXT;
                  break;
              default:
                  throw new RuntimeException();
              }
              in.position(p + size);
              return event;
          }
          return END_FILE;
      }
  }
  