jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/classfile/ConstantPool.java@b4b1f7732289

     1 /*

     2  * Copyright 2007-2008 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    26 package com.sun.tools.classfile;

    28 import java.io.IOException;

    30 /**

    31  * See JVMS3, section 4.5.

    32  *

    33  *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If

    34  *  you write code that depends on this, you do so at your own risk.

    35  *  This code and its internal interfaces are subject to change or

    36  *  deletion without notice.</b>

    37  */

    38 public class ConstantPool {

    40     public class InvalidIndex extends ConstantPoolException {

    41         private static final long serialVersionUID = -4350294289300939730L;

    42         InvalidIndex(int index) {

    43             super(index);

    44         }

    46         @Override

    47         public String getMessage() {

    48             // i18n

    49             return "invalid index #" + index;

    50         }

    51     }

    53     public class UnexpectedEntry extends ConstantPoolException {

    54         private static final long serialVersionUID = 6986335935377933211L;

    55         UnexpectedEntry(int index, int expected_tag, int found_tag) {

    56             super(index);

    57             this.expected_tag = expected_tag;

    58             this.found_tag = found_tag;

    59         }

    61         @Override

    62         public String getMessage() {

    63             // i18n?

    64             return "unexpected entry at #" + index + " -- expected tag " + expected_tag + ", found " + found_tag;

    65         }

    67         public final int expected_tag;

    68         public final int found_tag;

    69     }

    71     public class InvalidEntry extends ConstantPoolException {

    72         private static final long serialVersionUID = 1000087545585204447L;

    73         InvalidEntry(int index, int tag) {

    74             super(index);

    75             this.tag = tag;

    76         }

    78         @Override

    79         public String getMessage() {

    80             // i18n?

    81             return "unexpected tag at #" + index + ": " + tag;

    82         }

    84         public final int tag;

    85     }

    87     public class EntryNotFound extends ConstantPoolException {

    88         private static final long serialVersionUID = 2885537606468581850L;

    89         EntryNotFound(Object value) {

    90             super(-1);

    91             this.value = value;

    92         }

    94         @Override

    95         public String getMessage() {

    96             // i18n?

    97             return "value not found: " + value;

    98         }

   100         public final Object value;

   101     }

   103     public static final int CONSTANT_Utf8 = 1;

   104     public static final int CONSTANT_Integer = 3;

   105     public static final int CONSTANT_Float = 4;

   106     public static final int CONSTANT_Long = 5;

   107     public static final int CONSTANT_Double = 6;

   108     public static final int CONSTANT_Class = 7;

   109     public static final int CONSTANT_String = 8;

   110     public static final int CONSTANT_Fieldref = 9;

   111     public static final int CONSTANT_Methodref = 10;

   112     public static final int CONSTANT_InterfaceMethodref = 11;

   113     public static final int CONSTANT_NameAndType = 12;

   115     ConstantPool(ClassReader cr) throws IOException, InvalidEntry {

   116         int count = cr.readUnsignedShort();

   117         pool = new CPInfo[count];

   118         for (int i = 1; i < count; i++) {

   119             int tag = cr.readUnsignedByte();

   120             switch (tag) {

   121             case CONSTANT_Class:

   122                 pool[i] = new CONSTANT_Class_info(this, cr);

   123                 break;

   125             case CONSTANT_Double:

   126                 pool[i] = new CONSTANT_Double_info(cr);

   127                 i++;

   128                 break;

   130             case CONSTANT_Fieldref:

   131                 pool[i] = new CONSTANT_Fieldref_info(this, cr);

   132                 break;

   134             case CONSTANT_Float:

   135                 pool[i] = new CONSTANT_Float_info(cr);

   136                 break;

   138             case CONSTANT_Integer:

   139                 pool[i] = new CONSTANT_Integer_info(cr);

   140                 break;

   142             case CONSTANT_InterfaceMethodref:

   143                 pool[i] = new CONSTANT_InterfaceMethodref_info(this, cr);

   144                 break;

   146             case CONSTANT_Long:

   147                 pool[i] = new CONSTANT_Long_info(cr);

   148                 i++;

   149                 break;

   151             case CONSTANT_Methodref:

   152                 pool[i] = new CONSTANT_Methodref_info(this, cr);

   153                 break;

   155             case CONSTANT_NameAndType:

   156                 pool[i] = new CONSTANT_NameAndType_info(this, cr);

   157                 break;

   159             case CONSTANT_String:

   160                 pool[i] = new CONSTANT_String_info(this, cr);

   161                 break;

   163             case CONSTANT_Utf8:

   164                 pool[i] = new CONSTANT_Utf8_info(cr);

   165                 break;

   167             default:

   168                 throw new InvalidEntry(i, tag);

   169             }

   170         }

   171     }

   173     public ConstantPool(CPInfo[] pool) {

   174         this.pool = pool;

   175     }

   177     public int size() {

   178         return pool.length;

   179     }

   181     public CPInfo get(int index) throws InvalidIndex {

   182         if (index <= 0 || index >= pool.length)

   183             throw new InvalidIndex(index);

   184         CPInfo info = pool[index];

   185         if (info == null) {

   186             // this occurs for indices referencing the "second half" of an

   187             // 8 byte constant, such as CONSTANT_Double or CONSTANT_Long

   188             throw new InvalidIndex(index);

   189         }

   190         return pool[index];

   191     }

   193     private CPInfo get(int index, int expected_type) throws InvalidIndex, UnexpectedEntry {

   194         CPInfo info = get(index);

   195         if (info.getTag() != expected_type)

   196             throw new UnexpectedEntry(index, expected_type, info.getTag());

   197         return info;

   198     }

   200     public CONSTANT_Utf8_info getUTF8Info(int index) throws InvalidIndex, UnexpectedEntry {

   201         return ((CONSTANT_Utf8_info) get(index, CONSTANT_Utf8));

   202     }

   204     public CONSTANT_Class_info getClassInfo(int index) throws InvalidIndex, UnexpectedEntry {

   205         return ((CONSTANT_Class_info) get(index, CONSTANT_Class));

   206     }

   208     public CONSTANT_NameAndType_info getNameAndTypeInfo(int index) throws InvalidIndex, UnexpectedEntry {

   209         return ((CONSTANT_NameAndType_info) get(index, CONSTANT_NameAndType));

   210     }

   212     public String getUTF8Value(int index) throws InvalidIndex, UnexpectedEntry {

   213         return getUTF8Info(index).value;

   214     }

   216     public int getUTF8Index(String value) throws EntryNotFound {

   217         for (int i = 1; i < pool.length; i++) {

   218             CPInfo info = pool[i];

   219             if (info instanceof CONSTANT_Utf8_info &&

   220                     ((CONSTANT_Utf8_info) info).value.equals(value))

   221                 return i;

   222         }

   223         throw new EntryNotFound(value);

   224     }

   226     private CPInfo[] pool;

   228     public interface Visitor<R,P> {

   229         R visitClass(CONSTANT_Class_info info, P p);

   230         R visitDouble(CONSTANT_Double_info info, P p);

   231         R visitFieldref(CONSTANT_Fieldref_info info, P p);

   232         R visitFloat(CONSTANT_Float_info info, P p);

   233         R visitInteger(CONSTANT_Integer_info info, P p);

   234         R visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, P p);

   235         R visitLong(CONSTANT_Long_info info, P p);

   236         R visitNameAndType(CONSTANT_NameAndType_info info, P p);

   237         R visitMethodref(CONSTANT_Methodref_info info, P p);

   238         R visitString(CONSTANT_String_info info, P p);

   239         R visitUtf8(CONSTANT_Utf8_info info, P p);

   240     }

   242     public static abstract class CPInfo {

   243         CPInfo() {

   244             this.cp = null;

   245         }

   247         CPInfo(ConstantPool cp) {

   248             this.cp = cp;

   249         }

   251         public abstract int getTag();

   253         public abstract <R,D> R accept(Visitor<R,D> visitor, D data);

   255         protected final ConstantPool cp;

   256     }

   258     public static abstract class CPRefInfo extends CPInfo {

   259         protected CPRefInfo(ConstantPool cp, ClassReader cr, int tag) throws IOException {

   260             super(cp);

   261             this.tag = tag;

   262             class_index = cr.readUnsignedShort();

   263             name_and_type_index = cr.readUnsignedShort();

   264         }

   266         protected CPRefInfo(ConstantPool cp, int tag, int class_index, int name_and_type_index) {

   267             super(cp);

   268             this.tag = tag;

   269             this.class_index = class_index;

   270             this.name_and_type_index = name_and_type_index;

   271         }

   273         public int getTag() {

   274             return tag;

   275         }

   277         public CONSTANT_Class_info getClassInfo() throws ConstantPoolException {

   278             return cp.getClassInfo(class_index);

   279         }

   281         public String getClassName() throws ConstantPoolException {

   282             return cp.getClassInfo(class_index).getName();

   283         }

   285         public CONSTANT_NameAndType_info getNameAndTypeInfo() throws ConstantPoolException {

   286             return cp.getNameAndTypeInfo(name_and_type_index);

   287         }

   289         public final int tag;

   290         public final int class_index;

   291         public final int name_and_type_index;

   292     }

   294     public static class CONSTANT_Class_info extends CPInfo {

   295         CONSTANT_Class_info(ConstantPool cp, ClassReader cr) throws IOException {

   296             super(cp);

   297             name_index = cr.readUnsignedShort();

   298         }

   300         public CONSTANT_Class_info(ConstantPool cp, int name_index) {

   301             super(cp);

   302             this.name_index = name_index;

   303         }

   305         public int getTag() {

   306             return CONSTANT_Class;

   307         }

   309         public String getName() throws ConstantPoolException {

   310             return cp.getUTF8Value(name_index);

   311         }

   313         @Override

   314         public String toString() {

   315             return "CONSTANT_Class_info[name_index: " + name_index + "]";

   316         }

   318         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   319             return visitor.visitClass(this, data);

   320         }

   322         public final int name_index;

   323     }

   325     public static class CONSTANT_Double_info extends CPInfo {

   326         CONSTANT_Double_info(ClassReader cr) throws IOException {

   327             value = cr.readDouble();

   328         }

   330         public CONSTANT_Double_info(double value) {

   331             this.value = value;

   332         }

   334         public int getTag() {

   335             return CONSTANT_Double;

   336         }

   338         @Override

   339         public String toString() {

   340             return "CONSTANT_Double_info[value: " + value + "]";

   341         }

   343         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   344             return visitor.visitDouble(this, data);

   345         }

   347         public final double value;

   348     }

   350     public static class CONSTANT_Fieldref_info extends CPRefInfo {

   351         CONSTANT_Fieldref_info(ConstantPool cp, ClassReader cr) throws IOException {

   352             super(cp, cr, CONSTANT_Fieldref);

   353         }

   355         public CONSTANT_Fieldref_info(ConstantPool cp, int class_index, int name_and_type_index) {

   356             super(cp, CONSTANT_Fieldref, class_index, name_and_type_index);

   357         }

   359         @Override

   360         public String toString() {

   361             return "CONSTANT_Fieldref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]";

   362         }

   364         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   365             return visitor.visitFieldref(this, data);

   366         }

   367     }

   369     public static class CONSTANT_Float_info extends CPInfo {

   370         CONSTANT_Float_info(ClassReader cr) throws IOException {

   371             value = cr.readFloat();

   372         }

   374         public CONSTANT_Float_info(float value) {

   375             this.value = value;

   376         }

   378         public int getTag() {

   379             return CONSTANT_Float;

   380         }

   382         @Override

   383         public String toString() {

   384             return "CONSTANT_Float_info[value: " + value + "]";

   385         }

   387         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   388             return visitor.visitFloat(this, data);

   389         }

   391         public final float value;

   392     }

   394     public static class CONSTANT_Integer_info extends CPInfo {

   395         CONSTANT_Integer_info(ClassReader cr) throws IOException {

   396             value = cr.readInt();

   397         }

   399         public CONSTANT_Integer_info(int value) {

   400             this.value = value;

   401         }

   403         public int getTag() {

   404             return CONSTANT_Integer;

   405         }

   407         @Override

   408         public String toString() {

   409             return "CONSTANT_Integer_info[value: " + value + "]";

   410         }

   412         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   413             return visitor.visitInteger(this, data);

   414         }

   416         public final int value;

   417     }

   419     public static class CONSTANT_InterfaceMethodref_info extends CPRefInfo {

   420         CONSTANT_InterfaceMethodref_info(ConstantPool cp, ClassReader cr) throws IOException {

   421             super(cp, cr, CONSTANT_InterfaceMethodref);

   422         }

   424         public CONSTANT_InterfaceMethodref_info(ConstantPool cp, int class_index, int name_and_type_index) {

   425             super(cp, CONSTANT_InterfaceMethodref, class_index, name_and_type_index);

   426         }

   428         @Override

   429         public String toString() {

   430             return "CONSTANT_InterfaceMethodref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]";

   431         }

   433         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   434             return visitor.visitInterfaceMethodref(this, data);

   435         }

   436     }

   438     public static class CONSTANT_Long_info extends CPInfo {

   439         CONSTANT_Long_info(ClassReader cr) throws IOException {

   440             value = cr.readLong();

   441         }

   443         public CONSTANT_Long_info(long value) {

   444             this.value = value;

   445         }

   447         public int getTag() {

   448             return CONSTANT_Long;

   449         }

   451         @Override

   452         public String toString() {

   453             return "CONSTANT_Long_info[value: " + value + "]";

   454         }

   456         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   457             return visitor.visitLong(this, data);

   458         }

   460         public final long value;

   461     }

   463     public static class CONSTANT_Methodref_info extends CPRefInfo {

   464         CONSTANT_Methodref_info(ConstantPool cp, ClassReader cr) throws IOException {

   465             super(cp, cr, CONSTANT_Methodref);

   466         }

   468         public CONSTANT_Methodref_info(ConstantPool cp, int class_index, int name_and_type_index) {

   469             super(cp, CONSTANT_Methodref, class_index, name_and_type_index);

   470         }

   472         @Override

   473         public String toString() {

   474             return "CONSTANT_Methodref_info[class_index: " + class_index + ", name_and_type_index: " + name_and_type_index + "]";

   475         }

   477         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   478             return visitor.visitMethodref(this, data);

   479         }

   480     }

   482     public static class CONSTANT_NameAndType_info extends CPInfo {

   483         CONSTANT_NameAndType_info(ConstantPool cp, ClassReader cr) throws IOException {

   484             super(cp);

   485             name_index = cr.readUnsignedShort();

   486             type_index = cr.readUnsignedShort();

   487         }

   489         public CONSTANT_NameAndType_info(ConstantPool cp, int name_index, int type_index) {

   490             super(cp);

   491             this.name_index = name_index;

   492             this.type_index = type_index;

   493         }

   495         public int getTag() {

   496             return CONSTANT_NameAndType;

   497         }

   499         public String getName() throws ConstantPoolException {

   500             return cp.getUTF8Value(name_index);

   501         }

   503         public String getType() throws ConstantPoolException {

   504             return cp.getUTF8Value(type_index);

   505         }

   507         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   508             return visitor.visitNameAndType(this, data);

   509         }

   511         public final int name_index;

   512         public final int type_index;

   513     }

   515     public static class CONSTANT_String_info extends CPInfo {

   516         CONSTANT_String_info(ConstantPool cp, ClassReader cr) throws IOException {

   517             super(cp);

   518             string_index = cr.readUnsignedShort();

   519         }

   521         public CONSTANT_String_info(ConstantPool cp, int string_index) {

   522             super(cp);

   523             this.string_index = string_index;

   524         }

   526         public int getTag() {

   527             return CONSTANT_String;

   528         }

   530         public String getString() throws ConstantPoolException {

   531             return cp.getUTF8Value(string_index);

   532         }

   534         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   535             return visitor.visitString(this, data);

   536         }

   538         public final int string_index;

   539     }

   541     public static class CONSTANT_Utf8_info extends CPInfo {

   542         CONSTANT_Utf8_info(ClassReader cr) throws IOException {

   543             value = cr.readUTF();

   544         }

   546         public CONSTANT_Utf8_info(String value) {

   547             this.value = value;

   548         }

   550         public int getTag() {

   551             return CONSTANT_Utf8;

   552         }

   554         @Override

   555         public String toString() {

   556             return "CONSTANT_Utf8_info[value: " + value + "]";

   557         }

   559         public <R, D> R accept(Visitor<R, D> visitor, D data) {

   560             return visitor.visitUtf8(this, data);

   561         }

   563         public final String value;

   564     }

   567 }

Mercurial > jdk8-mips64-public > langtools / file revision

src/share/classes/com/sun/tools/classfile/ConstantPool.java@b4b1f7732289

src/share/classes/com/sun/tools/classfile/ConstantPool.java