--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/classfile/ConstantPool.java Tue Jun 03 13:26:47 2008 -0700
@@ -0,0 +1,562 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.tools.classfile;
+
+import java.io.IOException;
+
+/**
+ * See JVMS3, section 4.5.
+ *
+ * <p><b>This is NOT part of any API supported by Sun Microsystems. 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.</b>
+ */
+public class ConstantPool {
+
+ public class InvalidIndex extends ConstantPoolException {
+ InvalidIndex(int index) {
+ super(index);
+ }
+
+ @Override
+ public String getMessage() {
+ // i18n
+ return "invalid index #" + index;
+ }
+ }
+
+ public class UnexpectedEntry extends ConstantPoolException {
+ UnexpectedEntry(int index, int expected_tag, int found_tag) {
+ super(index);
+ this.expected_tag = expected_tag;
+ this.found_tag = found_tag;
+ }
+
+ @Override
+ public String getMessage() {
+ // i18n?
+ return "unexpected entry at #" + index + " -- expected tag " + expected_tag + ", found " + found_tag;
+ }
+
+ public final int expected_tag;
+ public final int found_tag;
+ }
+
+ public class InvalidEntry extends ConstantPoolException {
+ InvalidEntry(int index, int tag) {
+ super(index);
+ this.tag = tag;
+ }
+
+ @Override
+ public String getMessage() {
+ // i18n?
+ return "unexpected tag at #" + index + ": " + tag;
+ }
+
+ public final int tag;
+ }
+
+ public class EntryNotFound extends ConstantPoolException {
+ EntryNotFound(Object value) {
+ super(-1);
+ this.value = value;
+ }
+
+ @Override
+ public String getMessage() {
+ // i18n?
+ return "value not found: " + value;
+ }
+
+ public final Object value;
+ }
+
+ public static final int CONSTANT_Utf8 = 1;
+ public static final int CONSTANT_Integer = 3;
+ public static final int CONSTANT_Float = 4;
+ public static final int CONSTANT_Long = 5;
+ public static final int CONSTANT_Double = 6;
+ public static final int CONSTANT_Class = 7;
+ public static final int CONSTANT_String = 8;
+ public static final int CONSTANT_Fieldref = 9;
+ public static final int CONSTANT_Methodref = 10;
+ public static final int CONSTANT_InterfaceMethodref = 11;
+ public static final int CONSTANT_NameAndType = 12;
+
+ ConstantPool(ClassReader cr) throws IOException, InvalidEntry {
+ int count = cr.readUnsignedShort();
+ pool = new CPInfo[count];
+ for (int i = 1; i < count; i++) {
+ int tag = cr.readUnsignedByte();
+ switch (tag) {
+ case CONSTANT_Class:
+ pool[i] = new CONSTANT_Class_info(this, cr);
+ break;
+
+ case CONSTANT_Double:
+ pool[i] = new CONSTANT_Double_info(cr);
+ i++;
+ break;
+
+ case CONSTANT_Fieldref:
+ pool[i] = new CONSTANT_Fieldref_info(this, cr);
+ break;
+
+ case CONSTANT_Float:
+ pool[i] = new CONSTANT_Float_info(cr);
+ break;
+
+ case CONSTANT_Integer:
+ pool[i] = new CONSTANT_Integer_info(cr);
+ break;
+
+ case CONSTANT_InterfaceMethodref:
+ pool[i] = new CONSTANT_InterfaceMethodref_info(this, cr);
+ break;
+
+ case CONSTANT_Long:
+ pool[i] = new CONSTANT_Long_info(cr);
+ i++;
+ break;
+
+ case CONSTANT_Methodref:
+ pool[i] = new CONSTANT_Methodref_info(this, cr);
+ break;
+
+ case CONSTANT_NameAndType:
+ pool[i] = new CONSTANT_NameAndType_info(this, cr);
+ break;
+
+ case CONSTANT_String:
+ pool[i] = new CONSTANT_String_info(cr);
+ break;
+
+ case CONSTANT_Utf8:
+ pool[i] = new CONSTANT_Utf8_info(cr);
+ break;
+
+ default:
+ throw new InvalidEntry(i, tag);
+ }
+ }
+ }
+
+ public ConstantPool(CPInfo[] pool) {
+ this.pool = pool;
+ }
+
+ public int size() {
+ return pool.length;
+ }
+
+ public CPInfo get(int index) throws InvalidIndex {
+ if (index <= 0 || index >= pool.length)
+ throw new InvalidIndex(index);
+ CPInfo info = pool[index];
+ if (info == null) {
+ // this occurs for indices referencing the "second half" of an
+ // 8 byte constant, such as CONSTANT_Double or CONSTANT_Long
+ throw new InvalidIndex(index);
+ }
+ return pool[index];
+ }
+
+ private CPInfo get(int index, int expected_type) throws InvalidIndex, UnexpectedEntry {
+ CPInfo info = get(index);
+ if (info.getTag() != expected_type)
+ throw new UnexpectedEntry(index, expected_type, info.getTag());
+ return info;
+ }
+
+ public CONSTANT_Utf8_info getUTF8Info(int index) throws InvalidIndex, UnexpectedEntry {
+ return ((CONSTANT_Utf8_info) get(index, CONSTANT_Utf8));
+ }
+
+ public CONSTANT_Class_info getClassInfo(int index) throws InvalidIndex, UnexpectedEntry {
+ return ((CONSTANT_Class_info) get(index, CONSTANT_Class));
+ }
+
+ public CONSTANT_NameAndType_info getNameAndTypeInfo(int index) throws InvalidIndex, UnexpectedEntry {
+ return ((CONSTANT_NameAndType_info) get(index, CONSTANT_NameAndType));
+ }
+
+ public String getUTF8Value(int index) throws InvalidIndex, UnexpectedEntry {
+ return getUTF8Info(index).value;
+ }
+
+ public int getUTF8Index(String value) throws EntryNotFound {
+ for (int i = 1; i < pool.length; i++) {
+ CPInfo info = pool[i];
+ if (info instanceof CONSTANT_Utf8_info &&
+ ((CONSTANT_Utf8_info) info).value.equals(value))
+ return i;
+ }
+ throw new EntryNotFound(value);
+ }
+
+ private CPInfo[] pool;
+
+ public interface Visitor<R,P> {
+ R visitClass(CONSTANT_Class_info info, P p);
+ R visitDouble(CONSTANT_Double_info info, P p);
+ R visitFieldref(CONSTANT_Fieldref_info info, P p);
+ R visitFloat(CONSTANT_Float_info info, P p);
+ R visitInteger(CONSTANT_Integer_info info, P p);
+ R visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, P p);
+ R visitLong(CONSTANT_Long_info info, P p);
+ R visitNameAndType(CONSTANT_NameAndType_info info, P p);
+ R visitMethodref(CONSTANT_Methodref_info info, P p);
+ R visitString(CONSTANT_String_info info, P p);
+ R visitUtf8(CONSTANT_Utf8_info info, P p);
+ }
+
+ public static abstract class CPInfo {
+ CPInfo() {
+ this.cp = null;
+ }
+
+ CPInfo(ConstantPool cp) {
+ this.cp = cp;
+ }
+
+ public abstract int getTag();
+
+ public abstract <R,D> R accept(Visitor<R,D> visitor, D data);
+
+ protected final ConstantPool cp;
+ }
+
+ public static abstract class CPRefInfo extends CPInfo {
+ protected CPRefInfo(ConstantPool cp, ClassReader cr, int tag) throws IOException {
+ super(cp);
+ this.tag = tag;
+ class_index = cr.readUnsignedShort();
+ name_and_type_index = cr.readUnsignedShort();
+ }
+
+ protected CPRefInfo(ConstantPool cp, int tag, int class_index, int name_and_type_index) {
+ super(cp);
+ this.tag = tag;
+ this.class_index = class_index;
+ this.name_and_type_index = name_and_type_index;
+ }
+
+ public int getTag() {
+ return tag;
+ }
+
+ public CONSTANT_Class_info getClassInfo() throws ConstantPoolException {
+ return cp.getClassInfo(class_index);
+ }
+
+ public String getClassName() throws ConstantPoolException {
+ return cp.getClassInfo(class_index).getName();
+ }
+
+ public CONSTANT_NameAndType_info getNameAndTypeInfo() throws ConstantPoolException {
+ return cp.getNameAndTypeInfo(name_and_type_index);
+ }
+
+ public final int tag;
+ public final int class_index;
+ public final int name_and_type_index;
+ }
+
+ public static class CONSTANT_Class_info extends CPInfo {
+ CONSTANT_Class_info(ConstantPool cp, ClassReader cr) throws IOException {
+ super(cp);
+ name_index = cr.readUnsignedShort();
+ }
+
+ public CONSTANT_Class_info(ConstantPool cp, int name_index) {
+ super(cp);
+ this.name_index = name_index;
+ }
+
+ public int getTag() {
+ return CONSTANT_Class;
+ }
+
+ public String getName() throws ConstantPoolException {
+ return cp.getUTF8Value(name_index);
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_Class_info[name_index: " + name_index + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitClass(this, data);
+ }
+
+ public final int name_index;
+ }
+
+ public static class CONSTANT_Double_info extends CPInfo {
+ CONSTANT_Double_info(ClassReader cr) throws IOException {
+ value = cr.readDouble();
+ }
+
+ public CONSTANT_Double_info(double value) {
+ this.value = value;
+ }
+
+ public int getTag() {
+ return CONSTANT_Double;
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_Double_info[value: " + value + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitDouble(this, data);
+ }
+
+ public final double value;
+ }
+
+ public static class CONSTANT_Fieldref_info extends CPRefInfo {
+ CONSTANT_Fieldref_info(ConstantPool cp, ClassReader cr) throws IOException {
+ super(cp, cr, CONSTANT_Fieldref);
+ }
+
+ public CONSTANT_Fieldref_info(ConstantPool cp, int class_index, int name_and_type_index) {
+ super(cp, CONSTANT_Fieldref, class_index, name_and_type_index);
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_Fieldref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitFieldref(this, data);
+ }
+ }
+
+ public static class CONSTANT_Float_info extends CPInfo {
+ CONSTANT_Float_info(ClassReader cr) throws IOException {
+ value = cr.readFloat();
+ }
+
+ public CONSTANT_Float_info(float value) {
+ this.value = value;
+ }
+
+ public int getTag() {
+ return CONSTANT_Float;
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_Float_info[value: " + value + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitFloat(this, data);
+ }
+
+ public final float value;
+ }
+
+ public static class CONSTANT_Integer_info extends CPInfo {
+ CONSTANT_Integer_info(ClassReader cr) throws IOException {
+ value = cr.readInt();
+ }
+
+ public CONSTANT_Integer_info(int value) {
+ this.value = value;
+ }
+
+ public int getTag() {
+ return CONSTANT_Integer;
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_Integer_info[value: " + value + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitInteger(this, data);
+ }
+
+ public final int value;
+ }
+
+ public static class CONSTANT_InterfaceMethodref_info extends CPRefInfo {
+ CONSTANT_InterfaceMethodref_info(ConstantPool cp, ClassReader cr) throws IOException {
+ super(cp, cr, CONSTANT_InterfaceMethodref);
+ }
+
+ public CONSTANT_InterfaceMethodref_info(ConstantPool cp, int class_index, int name_and_type_index) {
+ super(cp, CONSTANT_InterfaceMethodref, class_index, name_and_type_index);
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_InterfaceMethodref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitInterfaceMethodref(this, data);
+ }
+ }
+
+ public static class CONSTANT_Long_info extends CPInfo {
+ CONSTANT_Long_info(ClassReader cr) throws IOException {
+ value = cr.readLong();
+ }
+
+ public CONSTANT_Long_info(long value) {
+ this.value = value;
+ }
+
+ public int getTag() {
+ return CONSTANT_Long;
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_Long_info[value: " + value + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitLong(this, data);
+ }
+
+ public final long value;
+ }
+
+ public static class CONSTANT_Methodref_info extends CPRefInfo {
+ CONSTANT_Methodref_info(ConstantPool cp, ClassReader cr) throws IOException {
+ super(cp, cr, CONSTANT_Methodref);
+ }
+
+ public CONSTANT_Methodref_info(ConstantPool cp, int class_index, int name_and_type_index) {
+ super(cp, CONSTANT_Methodref, class_index, name_and_type_index);
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_Methodref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitMethodref(this, data);
+ }
+ }
+
+ public static class CONSTANT_NameAndType_info extends CPInfo {
+ CONSTANT_NameAndType_info(ConstantPool cp, ClassReader cr) throws IOException {
+ super(cp);
+ name_index = cr.readUnsignedShort();
+ type_index = cr.readUnsignedShort();
+ }
+
+ public CONSTANT_NameAndType_info(ConstantPool cp, int name_index, int type_index) {
+ super(cp);
+ this.name_index = name_index;
+ this.type_index = type_index;
+ }
+
+ public int getTag() {
+ return CONSTANT_NameAndType;
+ }
+
+ public String getName() throws ConstantPoolException {
+ return cp.getUTF8Value(name_index);
+ }
+
+ public String getType() throws ConstantPoolException {
+ return cp.getUTF8Value(type_index);
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitNameAndType(this, data);
+ }
+
+ public final int name_index;
+ public final int type_index;
+ }
+
+ public static class CONSTANT_String_info extends CPInfo {
+ CONSTANT_String_info(ClassReader cr) throws IOException {
+ string_index = cr.readUnsignedShort();
+ }
+
+ public CONSTANT_String_info(ConstantPool cp, int string_index) {
+ super(cp);
+ this.string_index = string_index;
+ }
+
+ public int getTag() {
+ return CONSTANT_String;
+ }
+
+ public String getString() throws ConstantPoolException {
+ return cp.getUTF8Value(string_index);
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitString(this, data);
+ }
+
+ public final int string_index;
+ }
+
+ public static class CONSTANT_Utf8_info extends CPInfo {
+ CONSTANT_Utf8_info(ClassReader cr) throws IOException {
+ value = cr.readUTF();
+ }
+
+ public CONSTANT_Utf8_info(String value) {
+ this.value = value;
+ }
+
+ public int getTag() {
+ return CONSTANT_Utf8;
+ }
+
+ @Override
+ public String toString() {
+ return "CONSTANT_Utf8_info[value: " + value + "]";
+ }
+
+ public <R, D> R accept(Visitor<R, D> visitor, D data) {
+ return visitor.visitUtf8(this, data);
+ }
+
+ public final String value;
+ }
+
+
+}