127 lines
4.5 KiB
Java
127 lines
4.5 KiB
Java
/*
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* Copyright (c) 1996, 2020, 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.
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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 org.openjdk.asmtools.jdis;
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import org.openjdk.asmtools.jasm.JasmTokens;
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import org.openjdk.asmtools.jasm.Modifiers;
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import java.io.DataInputStream;
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import java.io.IOException;
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import static java.lang.String.format;
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import static org.openjdk.asmtools.jasm.Tables.AttrTag;
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import static org.openjdk.asmtools.jasm.Tables.CF_Context;
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import static org.openjdk.asmtools.jdis.TraceUtils.traceln;
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/**
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* Field data for field members in a class of the Java Disassembler
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*/
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public class FieldData extends MemberData {
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// CP index to the field name
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protected int name_cpx;
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// CP index to the field type
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protected int type_cpx;
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// CP index to the field value
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protected int value_cpx = 0;
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public FieldData(ClassData cls) {
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super(cls);
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memberType = "FieldData";
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}
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@Override
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protected boolean handleAttributes(DataInputStream in, AttrTag attrtag, int attrlen) throws IOException {
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// Read the Attributes
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boolean handled = true;
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switch (attrtag) {
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case ATT_Signature:
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if( signature != null ) {
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traceln("Record attribute: more than one attribute Signature are in component.attribute_info_attributes[attribute_count]");
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traceln("Last one will be used.");
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}
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signature = new SignatureData(cls).read(in, attrlen);
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break;
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case ATT_ConstantValue:
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if (attrlen != 2) {
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throw new ClassFormatError(format("%s: Invalid attribute length #%d", AttrTag.ATT_ConstantValue.printval(), attrlen));
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}
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value_cpx = in.readUnsignedShort();
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break;
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default:
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handled = false;
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break;
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}
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return handled;
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}
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/**
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* Read and resolve the field data called from ClassData.
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* Precondition: NumFields has already been read from the stream.
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*/
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public void read(DataInputStream in) throws IOException {
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// read the Fields CP indexes
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access = in.readUnsignedShort();
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name_cpx = in.readUnsignedShort();
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type_cpx = in.readUnsignedShort();
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// Read the attributes
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readAttributes(in);
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//
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TraceUtils.traceln(2,
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format("FieldData: name[%d]=%s type[%d]=%s%s",
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name_cpx, cls.pool.getString(name_cpx),
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type_cpx, cls.pool.getString(type_cpx),
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signature != null ? signature : ""));
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}
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/**
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* Prints the field data to the current output stream. called from ClassData.
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*/
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@Override
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public void print() throws IOException {
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// Print annotations first
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super.printAnnotations(getIndentString());
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StringBuilder bodyPrefix = new StringBuilder(getIndentString()).append(Modifiers.accessString(access, CF_Context.CTX_FIELD));
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StringBuilder tailPrefix = new StringBuilder();
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if (isSynthetic) {
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bodyPrefix.append(JasmTokens.Token.SYNTHETIC.parseKey()).append(' ');
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}
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if (isDeprecated) {
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bodyPrefix.append(JasmTokens.Token.DEPRECATED.parseKey()).append(' ');
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}
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// field
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bodyPrefix.append(JasmTokens.Token.FIELDREF.parseKey()).append(' ');
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if (value_cpx != 0) {
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tailPrefix.append("\t= ").append(cls.pool.ConstantStrValue(value_cpx));
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}
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printVar(bodyPrefix, tailPrefix,name_cpx, type_cpx);
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}
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} // end FieldData
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