| /* |
| * Copyright (c) 1994, 2003, 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 sun.tools.java; |
| |
| import java.io.IOException; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| |
| /** |
| * This class is used to represent an attribute from a binary class. |
| * This class should go away once arrays are objects. |
| * |
| * WARNING: The contents of this source file are not part of any |
| * supported API. Code that depends on them does so at its own risk: |
| * they are subject to change or removal without notice. |
| */ |
| public final |
| class BinaryAttribute implements Constants { |
| Identifier name; |
| byte data[]; |
| BinaryAttribute next; |
| |
| /** |
| * Constructor |
| */ |
| BinaryAttribute(Identifier name, byte data[], BinaryAttribute next) { |
| this.name = name; |
| this.data = data; |
| this.next = next; |
| } |
| |
| /** |
| * Load a list of attributes |
| */ |
| public static BinaryAttribute load(DataInputStream in, BinaryConstantPool cpool, int mask) throws IOException { |
| BinaryAttribute atts = null; |
| int natt = in.readUnsignedShort(); // JVM 4.6 method_info.attrutes_count |
| |
| for (int i = 0 ; i < natt ; i++) { |
| // id from JVM 4.7 attribute_info.attribute_name_index |
| Identifier id = cpool.getIdentifier(in.readUnsignedShort()); |
| // id from JVM 4.7 attribute_info.attribute_length |
| int len = in.readInt(); |
| |
| if (id.equals(idCode) && ((mask & ATT_CODE) == 0)) { |
| in.skipBytes(len); |
| } else { |
| byte data[] = new byte[len]; |
| in.readFully(data); |
| atts = new BinaryAttribute(id, data, atts); |
| } |
| } |
| return atts; |
| } |
| |
| // write out the Binary attributes to the given stream |
| // (note that attributes may be null) |
| static void write(BinaryAttribute attributes, DataOutputStream out, |
| BinaryConstantPool cpool, Environment env) throws IOException { |
| // count the number of attributes |
| int attributeCount = 0; |
| for (BinaryAttribute att = attributes; att != null; att = att.next) |
| attributeCount++; |
| out.writeShort(attributeCount); |
| |
| // write out each attribute |
| for (BinaryAttribute att = attributes; att != null; att = att.next) { |
| Identifier name = att.name; |
| byte data[] = att.data; |
| // write the identifier |
| out.writeShort(cpool.indexString(name.toString(), env)); |
| // write the length |
| out.writeInt(data.length); |
| // write the data |
| out.write(data, 0, data.length); |
| } |
| } |
| |
| /** |
| * Accessors |
| */ |
| |
| public Identifier getName() { return name; } |
| |
| public byte getData()[] { return data; } |
| |
| public BinaryAttribute getNextAttribute() { return next; } |
| |
| } |