| /* |
| * Copyright (c) 2007, 2016, 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), |
| REF_getStatic(2), |
| REF_putField(3), |
| REF_putStatic(4), |
| REF_invokeVirtual(5), |
| REF_invokeStatic(6), |
| REF_invokeSpecial(7), |
| REF_newInvokeSpecial(8), |
| REF_invokeInterface(9); |
| |
| public final int tag; |
| |
| RefKind(int tag) { |
| this.tag = tag; |
| } |
| |
| 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; |
| } |
| |
| } |
