/*
* 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; }
}