content: /*
   * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package openjdk.tools.classfile;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  
  /*
   *  <p><b>This is NOT part of any supported API.
   *  If you write code that depends on this, you do so at your own risk.
   *  This code and its internal interfaces are subject to change or
   *  deletion without notice.</b>
   */
  public class Attributes implements Iterable<Attribute> {
  
      public final Attribute[] attrs;
      public final Map<String, Attribute> map;
  
      Attributes(ClassReader cr) throws IOException {
          map = new HashMap<>();
          int attrs_count = cr.readUnsignedShort();
          attrs = new Attribute[attrs_count];
          for (int i = 0; i < attrs_count; i++) {
              Attribute attr = Attribute.read(cr);
              attrs[i] = attr;
              try {
                  map.put(attr.getName(cr.getConstantPool()), attr);
              } catch (ConstantPoolException e) {
                  // don't enter invalid names in map
              }
          }
      }
  
      public Attributes(ConstantPool constant_pool, Attribute[] attrs) {
          this.attrs = attrs;
          map = new HashMap<>();
          for (Attribute attr : attrs) {
              try {
                  map.put(attr.getName(constant_pool), attr);
              } catch (ConstantPoolException e) {
                  // don't enter invalid names in map
              }
          }
      }
  
      public Attributes(Map<String, Attribute> attributes) {
          this.attrs = attributes.values().toArray(new Attribute[attributes.size()]);
          map = attributes;
      }
  
      public Iterator<Attribute> iterator() {
          return Arrays.asList(attrs).iterator();
      }
  
      public Attribute get(int index) {
          return attrs[index];
      }
  
      public Attribute get(String name) {
          return map.get(name);
      }
  
      public int getIndex(ConstantPool constant_pool, String name) {
          for (int i = 0; i < attrs.length; i++) {
              Attribute attr = attrs[i];
              try {
                  if (attr != null && attr.getName(constant_pool).equals(name))
                      return i;
              } catch (ConstantPoolException e) {
                  // ignore invalid entries
              }
          }
          return -1;
      }
  
      public int size() {
          return attrs.length;
      }
  
      public int byteLength() {
          int length = 2;
          for (Attribute a: attrs)
              length += a.byteLength();
          return length;
      }
  }
  