jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/classfile/ConstantPool.java@31780dd06ec7 (annotated)

src/share/classes/com/sun/tools/classfile/ConstantPool.java@31780dd06ec7 (annotated)

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

Sat, 29 Dec 2012 17:33:17 -0800

author: jjg
date: Sat, 29 Dec 2012 17:33:17 -0800
changeset 1473: 31780dd06ec7
parent 972: 694ff82ca68e
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

8004727: Add compiler support for parameter reflection
Reviewed-by: jjg
Contributed-by: eric.mccorkle@oracle.com

 /*
  * Copyright (c) 2007, 2011, 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 com.sun.tools.classfile;
 import java.io.DataOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.util.Iterator;
 /**
  * See JVMS, section 4.5.
  *
  *  <p><b>This is NOT part of any supported API.
  *  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 static class InvalidIndex extends ConstantPoolException {
         private static final long serialVersionUID = -4350294289300939730L;
         InvalidIndex(int index) {
             super(index);
         }
         @Override
         public String getMessage() {
             // i18n
             return "invalid index #" + index;
         }
     }
     public static class UnexpectedEntry extends ConstantPoolException {
         private static final long serialVersionUID = 6986335935377933211L;
         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 static class InvalidEntry extends ConstantPoolException {
         private static final long serialVersionUID = 1000087545585204447L;
         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 static class EntryNotFound extends ConstantPoolException {
         private static final long serialVersionUID = 2885537606468581850L;
         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;
     public static final int CONSTANT_MethodHandle = 15;
     public static final int CONSTANT_MethodType = 16;
     public static final int CONSTANT_InvokeDynamic = 18;
     public static enum RefKind {
         REF_getField(1, "getfield"),
         REF_getStatic(2, "getstatic"),
         REF_putField(3, "putfield"),
         REF_putStatic(4, "putstatic"),
         REF_invokeVirtual(5, "invokevirtual"),
         REF_invokeStatic(6, "invokestatic"),
         REF_invokeSpecial(7, "invokespecial"),
         REF_newInvokeSpecial(8, "newinvokespecial"),
         REF_invokeInterface(9, "invokeinterface");
         public final int tag;
         public final String name;
         RefKind(int tag, String name) {
             this.tag = tag;
             this.name = name;
         }
         static RefKind getRefkind(int tag) {
             switch(tag) {
                 case 1:
                     return REF_getField;
                 case 2:
                     return REF_getStatic;
                 case 3:
                     return REF_putField;
                 case 4:
                     return REF_putStatic;
                 case 5:
                     return REF_invokeVirtual;
                 case 6:
                     return REF_invokeStatic;
                 case 7:
                     return REF_invokeSpecial;
                 case 8:
                     return REF_newInvokeSpecial;
                 case 9:
                     return REF_invokeInterface;
                 default:
                     return null;
             }
         }
     }
     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_InvokeDynamic:
                 pool[i] = new CONSTANT_InvokeDynamic_info(this, cr);
                 break;
             case CONSTANT_Long:
                 pool[i] = new CONSTANT_Long_info(cr);
                 i++;
                 break;
             case CONSTANT_MethodHandle:
                 pool[i] = new CONSTANT_MethodHandle_info(this, cr);
                 break;
             case CONSTANT_MethodType:
                 pool[i] = new CONSTANT_MethodType_info(this, cr);
                 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(this, 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 int byteLength() {
         int length = 2;
         for (int i = 1; i < size(); ) {
             CPInfo cpInfo = pool[i];
             length += cpInfo.byteLength();
             i += cpInfo.size();
         }
         return 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);
     }
     public Iterable<CPInfo> entries() {
         return new Iterable<CPInfo>() {
             public Iterator<CPInfo> iterator() {
                 return new Iterator<CPInfo>() {
                     public boolean hasNext() {
                         return next < pool.length;
                     }
                     public CPInfo next() {
                         current = pool[next];
                         switch (current.getTag()) {
                             case CONSTANT_Double:
                             case CONSTANT_Long:
                                 next += 2;
                                 break;
                             default:
                                 next += 1;
                         }
                         return current;
                     }
                     public void remove() {
                         throw new UnsupportedOperationException();
                     }
                     private CPInfo current;
                     private int next = 1;
                 };
             }
         };
     }
     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 visitInvokeDynamic(CONSTANT_InvokeDynamic_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 visitMethodHandle(CONSTANT_MethodHandle_info info, P p);
         R visitMethodType(CONSTANT_MethodType_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();
         /** The number of slots in the constant pool used by this entry.
          * 2 for CONSTANT_Double and CONSTANT_Long; 1 for everything else. */
         public int size() {
             return 1;
         }
         public abstract int byteLength();
         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 int byteLength() {
             return 5;
         }
         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 int  byteLength() {
             return 3;
         }
         /**
          * Get the raw value of the class referenced by this constant pool entry.
          * This will either be the name of the class, in internal form, or a
          * descriptor for an array class.
          * @return the raw value of the class
          */
         public String getName() throws ConstantPoolException {
             return cp.getUTF8Value(name_index);
         }
         /**
          * If this constant pool entry identifies either a class or interface type,
          * or a possibly multi-dimensional array of a class of interface type,
          * return the name of the class or interface in internal form. Otherwise,
          * (i.e. if this is a possibly multi-dimensional array of a primitive type),
          * return null.
          * @return the base class or interface name
          */
         public String getBaseName() throws ConstantPoolException {
             String name = getName();
             if (name.startsWith("[")) {
                 int index = name.indexOf("[L");
                 if (index == -1)
                     return null;
                 return name.substring(index + 2, name.length() - 1);
             } else
                 return name;
         }
         public int getDimensionCount() throws ConstantPoolException {
             String name = getName();
             int count = 0;
             while (name.charAt(count) == '[')
                 count++;
             return count;
         }
         @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;
         }
         public int  byteLength() {
             return 9;
         }
         @Override
         public int size() {
             return 2;
         }
         @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;
         }
         public int byteLength() {
             return 5;
         }
         @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;
         }
         public int byteLength() {
             return 5;
         }
         @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_InvokeDynamic_info extends CPInfo {
         CONSTANT_InvokeDynamic_info(ConstantPool cp, ClassReader cr) throws IOException {
             super(cp);
             bootstrap_method_attr_index = cr.readUnsignedShort();
             name_and_type_index = cr.readUnsignedShort();
         }
         public CONSTANT_InvokeDynamic_info(ConstantPool cp, int bootstrap_method_index, int name_and_type_index) {
             super(cp);
             this.bootstrap_method_attr_index = bootstrap_method_index;
             this.name_and_type_index = name_and_type_index;
         }
         public int getTag() {
             return CONSTANT_InvokeDynamic;
         }
         public int byteLength() {
             return 5;
         }
         @Override
         public String toString() {
             return "CONSTANT_InvokeDynamic_info[bootstrap_method_index: " + bootstrap_method_attr_index + ", name_and_type_index: " + name_and_type_index + "]";
         }
         public <R, D> R accept(Visitor<R, D> visitor, D data) {
             return visitor.visitInvokeDynamic(this, data);
         }
         public CONSTANT_NameAndType_info getNameAndTypeInfo() throws ConstantPoolException {
             return cp.getNameAndTypeInfo(name_and_type_index);
         }
         public final int bootstrap_method_attr_index;
         public final int name_and_type_index;
     }
     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 int size() {
             return 2;
         }
         public int byteLength() {
             return 9;
         }
         @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_MethodHandle_info extends CPInfo {
         CONSTANT_MethodHandle_info(ConstantPool cp, ClassReader cr) throws IOException {
             super(cp);
             reference_kind =  RefKind.getRefkind(cr.readUnsignedByte());
             reference_index = cr.readUnsignedShort();
         }
         public CONSTANT_MethodHandle_info(ConstantPool cp, RefKind ref_kind, int member_index) {
             super(cp);
             this.reference_kind = ref_kind;
             this.reference_index = member_index;
         }
         public int getTag() {
             return CONSTANT_MethodHandle;
         }
         public int byteLength() {
             return 4;
         }
         @Override
         public String toString() {
             return "CONSTANT_MethodHandle_info[ref_kind: " + reference_kind + ", member_index: " + reference_index + "]";
         }
         public <R, D> R accept(Visitor<R, D> visitor, D data) {
             return visitor.visitMethodHandle(this, data);
         }
         public CPRefInfo getCPRefInfo() throws ConstantPoolException {
             int expected = CONSTANT_Methodref;
             int actual = cp.get(reference_index).getTag();
             // allow these tag types also:
             switch (actual) {
                 case CONSTANT_Fieldref:
                 case CONSTANT_InterfaceMethodref:
                     expected = actual;
             }
             return (CPRefInfo) cp.get(reference_index, expected);
         }
         public final RefKind reference_kind;
         public final int reference_index;
     }
     public static class CONSTANT_MethodType_info extends CPInfo {
         CONSTANT_MethodType_info(ConstantPool cp, ClassReader cr) throws IOException {
             super(cp);
             descriptor_index = cr.readUnsignedShort();
         }
         public CONSTANT_MethodType_info(ConstantPool cp, int signature_index) {
             super(cp);
             this.descriptor_index = signature_index;
         }
         public int getTag() {
             return CONSTANT_MethodType;
         }
         public int byteLength() {
             return 3;
         }
         @Override
         public String toString() {
             return "CONSTANT_MethodType_info[signature_index: " + descriptor_index + "]";
         }
         public <R, D> R accept(Visitor<R, D> visitor, D data) {
             return visitor.visitMethodType(this, data);
         }
         public String getType() throws ConstantPoolException {
             return cp.getUTF8Value(descriptor_index);
         }
         public final int descriptor_index;
     }
     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 int byteLength() {
             return 5;
         }
         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);
         }
         @Override
         public String toString() {
             return "CONSTANT_NameAndType_info[name_index: " + name_index + ", type_index: " + type_index + "]";
         }
         public final int name_index;
         public final int type_index;
     }
     public static class CONSTANT_String_info extends CPInfo {
         CONSTANT_String_info(ConstantPool cp, ClassReader cr) throws IOException {
             super(cp);
             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 int byteLength() {
             return 3;
         }
         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);
         }
         @Override
         public String toString() {
             return "CONSTANT_String_info[class_index: " + string_index + "]";
         }
         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;
         }
         public int byteLength() {
             class SizeOutputStream extends OutputStream {
                 @Override
                 public void write(int b) {
                     size++;
                 }
                 int size;
             }
             SizeOutputStream sizeOut = new SizeOutputStream();
             DataOutputStream out = new DataOutputStream(sizeOut);
             try { out.writeUTF(value); } catch (IOException ignore) { }
             return 1 + sizeOut.size;
         }
         @Override
         public String toString() {
             if (value.length() < 32 && isPrintableAscii(value))
                 return "CONSTANT_Utf8_info[value: \"" + value + "\"]";
             else
                 return "CONSTANT_Utf8_info[value: (" + value.length() + " chars)]";
         }
         static boolean isPrintableAscii(String s) {
             for (int i = 0; i < s.length(); i++) {
                 char c = s.charAt(i);
                 if (c < 32 || c >= 127)
                     return false;
             }
             return true;
         }
         public <R, D> R accept(Visitor<R, D> visitor, D data) {
             return visitor.visitUtf8(this, data);
         }
         public final String value;
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/classfile/ConstantPool.java@31780dd06ec7 (annotated)

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