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1 /* |
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2 * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package com.sun.tools.classfile; |
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27 |
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28 import java.io.IOException; |
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29 import java.util.Arrays; |
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30 import java.util.HashMap; |
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31 import java.util.Iterator; |
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32 import java.util.Map; |
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33 |
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34 /* |
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35 * <p><b>This is NOT part of any supported API. |
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36 * If you write code that depends on this, you do so at your own risk. |
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37 * This code and its internal interfaces are subject to change or |
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38 * deletion without notice.</b> |
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39 */ |
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40 public class Attributes implements Iterable<Attribute> { |
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41 |
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42 public final Attribute[] attrs; |
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43 public final Map<String, Attribute> map; |
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44 |
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45 Attributes(ClassReader cr) throws IOException { |
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46 map = new HashMap<>(); |
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47 int attrs_count = cr.readUnsignedShort(); |
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48 attrs = new Attribute[attrs_count]; |
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49 for (int i = 0; i < attrs_count; i++) { |
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50 Attribute attr = Attribute.read(cr); |
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51 attrs[i] = attr; |
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52 try { |
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53 map.put(attr.getName(cr.getConstantPool()), attr); |
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54 } catch (ConstantPoolException e) { |
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55 // don't enter invalid names in map |
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56 } |
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57 } |
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58 } |
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59 |
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60 public Attributes(ConstantPool constant_pool, Attribute[] attrs) { |
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61 this.attrs = attrs; |
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62 map = new HashMap<>(); |
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63 for (Attribute attr : attrs) { |
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64 try { |
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65 map.put(attr.getName(constant_pool), attr); |
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66 } catch (ConstantPoolException e) { |
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67 // don't enter invalid names in map |
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68 } |
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69 } |
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70 } |
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71 |
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72 public Iterator<Attribute> iterator() { |
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73 return Arrays.asList(attrs).iterator(); |
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74 } |
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75 |
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76 public Attribute get(int index) { |
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77 return attrs[index]; |
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78 } |
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79 |
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80 public Attribute get(String name) { |
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81 return map.get(name); |
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82 } |
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83 |
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84 public int getIndex(ConstantPool constant_pool, String name) { |
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85 for (int i = 0; i < attrs.length; i++) { |
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86 Attribute attr = attrs[i]; |
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87 try { |
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88 if (attr != null && attr.getName(constant_pool).equals(name)) |
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89 return i; |
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90 } catch (ConstantPoolException e) { |
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91 // ignore invalid entries |
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92 } |
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93 } |
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94 return -1; |
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95 } |
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96 |
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97 public int size() { |
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98 return attrs.length; |
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99 } |
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100 |
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101 public int byteLength() { |
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102 int length = 2; |
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103 for (Attribute a: attrs) |
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104 length += a.byteLength(); |
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105 return length; |
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106 } |
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107 } |