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/*
 * 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 com.sun.tools.classfile;

import java.io.IOException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/*
 *  

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. */ public class Attributes implements Iterable { public final Attribute[] attrs; public final Map 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 attributes) { this.attrs = attributes.values().toArray(new Attribute[attributes.size()]); map = attributes; } public Iterator 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; } }





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