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