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223 lines
6.0 KiB
223 lines
6.0 KiB
/* FieldInfo Copyright (C) 1998-1999 Jochen Hoenicke.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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*/
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package net.sf.jode.bytecode;
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.lang.reflect.Modifier;
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///#def COLLECTIONEXTRA java.lang
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import java.lang.Comparable;
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///#enddef
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public final class FieldInfo extends BinaryInfo implements Comparable {
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int modifier;
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String name;
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String typeSig;
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Object constant;
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boolean syntheticFlag;
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boolean deprecatedFlag;
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public FieldInfo() {
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}
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public FieldInfo(String name, String typeSig, int modifier) {
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this.name = name;
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this.typeSig = typeSig;
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this.modifier = modifier;
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}
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protected void readAttribute(String name, int length,
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ConstantPool cp,
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DataInputStream input,
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int howMuch) throws IOException {
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if (howMuch >= ClassInfo.DECLARATIONS
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&& name.equals("ConstantValue")) {
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if (length != 2)
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throw new ClassFormatException
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("ConstantValue attribute has wrong length");
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int index = input.readUnsignedShort();
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constant = cp.getConstant(index);
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} else if (name.equals("Synthetic")) {
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syntheticFlag = true;
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if (length != 0)
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throw new ClassFormatException
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("Synthetic attribute has wrong length");
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} else if (name.equals("Deprecated")) {
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deprecatedFlag = true;
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if (length != 0)
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throw new ClassFormatException
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("Deprecated attribute has wrong length");
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} else
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super.readAttribute(name, length, cp, input, howMuch);
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}
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void read(ConstantPool constantPool,
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DataInputStream input, int howMuch) throws IOException {
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modifier = input.readUnsignedShort();
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name = constantPool.getUTF8(input.readUnsignedShort());
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typeSig = constantPool.getUTF8(input.readUnsignedShort());
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readAttributes(constantPool, input, howMuch);
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}
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void reserveSmallConstants(GrowableConstantPool gcp) {
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}
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void prepareWriting(GrowableConstantPool gcp) {
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gcp.putUTF8(name);
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gcp.putUTF8(typeSig);
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if (constant != null) {
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gcp.putUTF8("ConstantValue");
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if (typeSig.charAt(0) == 'J' || typeSig.charAt(0) == 'D')
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gcp.putLongConstant(constant);
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else
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gcp.putConstant(constant);
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}
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if (syntheticFlag)
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gcp.putUTF8("Synthetic");
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if (deprecatedFlag)
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gcp.putUTF8("Deprecated");
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prepareAttributes(gcp);
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}
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protected int getAttributeCount() {
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int count = super.getAttributeCount();
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if (constant != null)
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count++;
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if (syntheticFlag)
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count++;
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if (deprecatedFlag)
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count++;
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return count;
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}
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protected void writeAttributes(GrowableConstantPool gcp,
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DataOutputStream output)
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throws IOException {
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super.writeAttributes(gcp, output);
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if (constant != null) {
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output.writeShort(gcp.putUTF8("ConstantValue"));
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output.writeInt(2);
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int index;
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if (typeSig.charAt(0) == 'J'
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|| typeSig.charAt(0) == 'D')
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index = gcp.putLongConstant(constant);
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else
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index = gcp.putConstant(constant);
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output.writeShort(index);
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}
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if (syntheticFlag) {
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output.writeShort(gcp.putUTF8("Synthetic"));
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output.writeInt(0);
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}
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if (deprecatedFlag) {
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output.writeShort(gcp.putUTF8("Deprecated"));
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output.writeInt(0);
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}
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}
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void write(GrowableConstantPool constantPool,
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DataOutputStream output) throws IOException {
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output.writeShort(modifier);
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output.writeShort(constantPool.putUTF8(name));
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output.writeShort(constantPool.putUTF8(typeSig));
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writeAttributes(constantPool, output);
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}
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protected void drop(int keep) {
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if (keep < ClassInfo.DECLARATIONS)
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constant = null;
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super.drop(keep);
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}
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public String getName() {
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return name;
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}
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public String getType() {
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return typeSig;
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}
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public int getModifiers() {
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return modifier;
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}
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public boolean isSynthetic() {
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return syntheticFlag;
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}
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public boolean isDeprecated() {
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return deprecatedFlag;
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}
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public Object getConstant() {
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return constant;
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}
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public void setName(String newName) {
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name = newName;
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}
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public void setType(String newType) {
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typeSig = newType;
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}
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public void setModifiers(int newModifier) {
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modifier = newModifier;
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}
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public void setSynthetic(boolean flag) {
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syntheticFlag = flag;
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}
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public void setDeprecated(boolean flag) {
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deprecatedFlag = flag;
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}
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public void setConstant(Object newConstant) {
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constant = newConstant;
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}
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/**
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* Compares two FieldInfo objects for field order. The field
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* order is as follows: First the static class intializer followed
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* by constructor with type signature sorted lexicographic. Then
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* all other fields sorted lexicographically by name. If two
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* fields have the same name, they are sorted by type signature,
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* though that can only happen for obfuscated code.
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*
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* @return a positive number if this field follows the other in
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* field order, a negative number if it preceeds the
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* other, and 0 if they are equal.
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* @exception ClassCastException if other is not a ClassInfo. */
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public int compareTo(Object other) {
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FieldInfo fi = (FieldInfo) other;
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int result = name.compareTo(fi.name);
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if (result == 0)
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result = typeSig.compareTo(fi.typeSig);
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return result;
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}
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public String toString() {
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return "Field "+Modifier.toString(modifier)+" "+
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typeSig+" "+name;
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}
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}
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