/* * Copyright (c) 2008, 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 sun.invoke.anon; import java.io.IOException;import java.io.OutputStream;import java.util.Arrays;import java.util.HashSet;import java.util.IdentityHashMap;import java.util.Map; import static sun.invoke.anon.ConstantPoolVisitor.*; /** A class and its patched constant pool. * * This class allow to modify (patch) a constant pool * by changing the value of its entry. * Entry are referenced using index that can be get * by parsing the constant pool using * {@link ConstantPoolParser#parse(ConstantPoolVisitor)}. * * @see ConstantPoolVisitor * @see ConstantPoolParser#createPatch() */public class ConstantPoolPatch { final ConstantPoolParser outer; final Object[] patchArray; ConstantPoolPatch(ConstantPoolParser outer) { this.outer = outer; this.patchArray = new Object[outer.getLength()]; } /** Create a {@link ConstantPoolParser} and * a {@link ConstantPoolPatch} in one step. * Equivalent to {@code new ConstantPoolParser(classFile).createPatch()}. * * @param classFile an array of bytes containing a class. * @see #ConstantPoolParser(Class) */ public ConstantPoolPatch(byte[] classFile) throws InvalidConstantPoolFormatException { this(new ConstantPoolParser(classFile)); } /** Create a {@link ConstantPoolParser} and * a {@link ConstantPoolPatch} in one step. * Equivalent to {@code new ConstantPoolParser(templateClass).createPatch()}. * * @param templateClass the class to parse. * @see #ConstantPoolParser(Class) */ public ConstantPoolPatch(Class<?> templateClass) throws IOException, InvalidConstantPoolFormatException { this(new ConstantPoolParser(templateClass)); } /** Creates a patch from an existing patch. * All changes are copied from that patch. * @param patch a patch * * @see ConstantPoolParser#createPatch() */ public ConstantPoolPatch(ConstantPoolPatch patch) { outer = patch.outer; patchArray = patch.patchArray.clone(); } /** Which parser built this patch? */ public ConstantPoolParser getParser() { return outer; } /** Report the tag at the given index in the constant pool. */ public byte getTag(int index) { return outer.getTag(index); } /** Report the current patch at the given index of the constant pool. * Null means no patch will be made. * To observe the unpatched entry at the given index, use * {@link #getParser()}{@code .}@link ConstantPoolParser#parse(ConstantPoolVisitor)} */ public Object getPatch(int index) { Object value = patchArray[index]; if (value == null) return null; switch (getTag(index)) { case CONSTANT_Fieldref: case CONSTANT_Methodref: case CONSTANT_InterfaceMethodref: if (value instanceof String) value = stripSemis(2, (String) value); break; case CONSTANT_NameAndType: if (value instanceof String) value = stripSemis(1, (String) value); break; } return value; } /** Clear all patches. */ public void clear() { Arrays.fill(patchArray, null); } /** Clear one patch. */ public void clear(int index) { patchArray[index] = null; } /** Produce the patches as an array. */ public Object[] getPatches() { return patchArray.clone(); } /** Produce the original constant pool as an array. */ public Object[] getOriginalCP() throws InvalidConstantPoolFormatException { return getOriginalCP(0, patchArray.length, -1); } /** Walk the constant pool, applying patches using the given map. * * @param utf8Map Utf8 strings to modify, if encountered * @param classMap Classes (or their names) to modify, if encountered * @param valueMap Constant values to modify, if encountered * @param deleteUsedEntries if true, delete map entries that are used */ public void putPatches(final Map<String,String> utf8Map, final Map<String,Object> classMap, final Map<Object,Object> valueMap, boolean deleteUsedEntries) throws InvalidConstantPoolFormatException { final HashSet<String> usedUtf8Keys; final HashSet<String> usedClassKeys; final HashSet<Object> usedValueKeys; if (deleteUsedEntries) { usedUtf8Keys = (utf8Map == null) ? null : new HashSet<String>(); usedClassKeys = (classMap == null) ? null : new HashSet<String>(); usedValueKeys = (valueMap == null) ? null : new HashSet<Object>(); } else { usedUtf8Keys = null; usedClassKeys = null; usedValueKeys = null; } outer.parse(new ConstantPoolVisitor() { @Override public void visitUTF8(int index, byte tag, String utf8) { putUTF8(index, utf8Map.get(utf8)); if (usedUtf8Keys != null) usedUtf8Keys.add(utf8); } @Override public void visitConstantValue(int index, byte tag, Object value) { putConstantValue(index, tag, valueMap.get(value)); if (usedValueKeys != null) usedValueKeys.add(value); } @Override public void visitConstantString(int index, byte tag, String name, int nameIndex) { if (tag == CONSTANT_Class) { putConstantValue(index, tag, classMap.get(name)); if (usedClassKeys != null) usedClassKeys.add(name); } else { assert(tag == CONSTANT_String); visitConstantValue(index, tag, name); } } }); if (usedUtf8Keys != null) utf8Map.keySet().removeAll(usedUtf8Keys); if (usedClassKeys != null) classMap.keySet().removeAll(usedClassKeys); if (usedValueKeys != null) valueMap.keySet().removeAll(usedValueKeys); } Object[] getOriginalCP(final int startIndex, final int endIndex, final int tagMask) throws InvalidConstantPoolFormatException { final Object[] cpArray = new Object[endIndex - startIndex]; outer.parse(new ConstantPoolVisitor() { void show(int index, byte tag, Object value) { if (index < startIndex || index >= endIndex) return; if (((1 << tag) & tagMask) == 0) return; cpArray[index - startIndex] = value; } @Override public void visitUTF8(int index, byte tag, String utf8) { show(index, tag, utf8); } @Override public void visitConstantValue(int index, byte tag, Object value) { assert(tag != CONSTANT_String); show(index, tag, value); } @Override public void visitConstantString(int index, byte tag, String value, int j) { show(index, tag, value); } @Override public void visitMemberRef(int index, byte tag, String className, String memberName, String signature, int j, int k) { show(index, tag, new String[]{ className, memberName, signature }); } @Override public void visitDescriptor(int index, byte tag, String memberName, String signature, int j, int k) { show(index, tag, new String[]{ memberName, signature }); } }); return cpArray; } /** Write the head (header plus constant pool) * of the patched class file to the indicated stream. */ void writeHead(OutputStream out) throws IOException { outer.writePatchedHead(out, patchArray); } /** Write the tail (everything after the constant pool) * of the patched class file to the indicated stream. */ void writeTail(OutputStream out) throws IOException { outer.writeTail(out); } private void checkConstantTag(byte tag, Object value) { if (value == null) throw new IllegalArgumentException( "invalid null constant value"); if (classForTag(tag) != value.getClass()) throw new IllegalArgumentException( "invalid constant value" + (tag == CONSTANT_None ? "" : " for tag "+tagName(tag)) + " of class "+value.getClass()); } private void checkTag(int index, byte putTag) { byte tag = outer.tags[index]; if (tag != putTag) throw new IllegalArgumentException( "invalid put operation" + " for " + tagName(putTag) + " at index " + index + " found " + tagName(tag)); } private void checkTagMask(int index, int tagBitMask) { byte tag = outer.tags[index]; int tagBit = ((tag & 0x1F) == tag) ? (1 << tag) : 0; if ((tagBit & tagBitMask) == 0) throw new IllegalArgumentException( "invalid put operation" + " at index " + index + " found " + tagName(tag)); } private static void checkMemberName(String memberName) { if (memberName.indexOf(';') >= 0) throw new IllegalArgumentException("memberName " + memberName + " contains a ';'"); } /** Set the entry of the constant pool indexed by index to * a new string. * * @param index an index to a constant pool entry containing a * {@link ConstantPoolVisitor#CONSTANT_Utf8} value. * @param utf8 a string * * @see ConstantPoolVisitor#visitUTF8(int, byte, String) */ public void putUTF8(int index, String utf8) { if (utf8 == null) { clear(index); return; } checkTag(index, CONSTANT_Utf8); patchArray[index] = utf8; } /** Set the entry of the constant pool indexed by index to * a new value, depending on its dynamic type. * * @param index an index to a constant pool entry containing a * one of the following structures: * {@link ConstantPoolVisitor#CONSTANT_Integer}, * {@link ConstantPoolVisitor#CONSTANT_Float}, * {@link ConstantPoolVisitor#CONSTANT_Long}, * {@link ConstantPoolVisitor#CONSTANT_Double}, * {@link ConstantPoolVisitor#CONSTANT_String}, or * {@link ConstantPoolVisitor#CONSTANT_Class} * @param value a boxed int, float, long or double; or a string or class object * @throws IllegalArgumentException if the type of the constant does not * match the constant pool entry type, * as reported by {@link #getTag(int)} * * @see #putConstantValue(int, byte, Object) * @see ConstantPoolVisitor#visitConstantValue(int, byte, Object) * @see ConstantPoolVisitor#visitConstantString(int, byte, String, int) */ public void putConstantValue(int index, Object value) { if (value == null) { clear(index); return; } byte tag = tagForConstant(value.getClass()); checkConstantTag(tag, value); checkTag(index, tag); patchArray[index] = value; } /** Set the entry of the constant pool indexed by index to * a new value. * * @param index an index to a constant pool entry matching the given tag * @param tag one of the following values: * {@link ConstantPoolVisitor#CONSTANT_Integer}, * {@link ConstantPoolVisitor#CONSTANT_Float}, * {@link ConstantPoolVisitor#CONSTANT_Long}, * {@link ConstantPoolVisitor#CONSTANT_Double}, * {@link ConstantPoolVisitor#CONSTANT_String}, or * {@link ConstantPoolVisitor#CONSTANT_Class} * @param value a boxed number, string, or class object * @throws IllegalArgumentException if the type of the constant does not * match the constant pool entry type, or if a class name contains * '/' or ';' * * @see #putConstantValue(int, Object) * @see ConstantPoolVisitor#visitConstantValue(int, byte, Object) * @see ConstantPoolVisitor#visitConstantString(int, byte, String, int) */ public void putConstantValue(int index, byte tag, Object value) { if (value == null) { clear(index); return; } checkTag(index, tag); if (tag == CONSTANT_Class && value instanceof String) { checkClassName((String) value); } else if (tag == CONSTANT_String) { // the JVM accepts any object as a patch for a string } else { // make sure the incoming value is the right type checkConstantTag(tag, value); } checkTag(index, tag); patchArray[index] = value; } /** Set the entry of the constant pool indexed by index to * a new {@link ConstantPoolVisitor#CONSTANT_NameAndType} value. * * @param index an index to a constant pool entry containing a * {@link ConstantPoolVisitor#CONSTANT_NameAndType} value. * @param memberName a memberName * @param signature a signature * @throws IllegalArgumentException if memberName contains the character ';' * * @see ConstantPoolVisitor#visitDescriptor(int, byte, String, String, int, int) */ public void putDescriptor(int index, String memberName, String signature) { checkTag(index, CONSTANT_NameAndType); checkMemberName(memberName); patchArray[index] = addSemis(memberName, signature); } /** Set the entry of the constant pool indexed by index to * a new {@link ConstantPoolVisitor#CONSTANT_Fieldref}, * {@link ConstantPoolVisitor#CONSTANT_Methodref}, or * {@link ConstantPoolVisitor#CONSTANT_InterfaceMethodref} value. * * @param index an index to a constant pool entry containing a member reference * @param className a class name * @param memberName a field or method name * @param signature a field or method signature * @throws IllegalArgumentException if memberName contains the character ';' * or signature is not a correct signature * * @see ConstantPoolVisitor#visitMemberRef(int, byte, String, String, String, int, int) */ public void putMemberRef(int index, byte tag, String className, String memberName, String signature) { checkTagMask(tag, CONSTANT_MemberRef_MASK); checkTag(index, tag); checkClassName(className); checkMemberName(memberName); if (signature.startsWith("(") == (tag == CONSTANT_Fieldref)) throw new IllegalArgumentException("bad signature: "+signature); patchArray[index] = addSemis(className, memberName, signature); } static private final int CONSTANT_MemberRef_MASK = CONSTANT_Fieldref | CONSTANT_Methodref | CONSTANT_InterfaceMethodref; private static final Map<Class<?>, Byte> CONSTANT_VALUE_CLASS_TAG = new IdentityHashMap<Class<?>, Byte>(); private static final Class[] CONSTANT_VALUE_CLASS = new Class[16]; static { Object[][] values = { {Integer.class, CONSTANT_Integer}, {Long.class, CONSTANT_Long}, {Float.class, CONSTANT_Float}, {Double.class, CONSTANT_Double}, {String.class, CONSTANT_String}, {Class.class, CONSTANT_Class} }; for (Object[] value : values) { Class<?> cls = (Class<?>)value[0]; Byte tag = (Byte) value[1]; CONSTANT_VALUE_CLASS_TAG.put(cls, tag); CONSTANT_VALUE_CLASS[(byte)tag] = cls; } } static Class<?> classForTag(byte tag) { if ((tag & 0xFF) >= CONSTANT_VALUE_CLASS.length) return null; return CONSTANT_VALUE_CLASS[tag]; } static byte tagForConstant(Class<?> cls) { Byte tag = CONSTANT_VALUE_CLASS_TAG.get(cls); return (tag == null) ? CONSTANT_None : (byte)tag; } private static void checkClassName(String className) { if (className.indexOf('/') >= 0 || className.indexOf(';') >= 0) throw new IllegalArgumentException("invalid class name " + className); } static String addSemis(String name, String... names) { StringBuilder buf = new StringBuilder(name.length() * 5); buf.append(name); for (String name2 : names) { buf.append(';').append(name2); } String res = buf.toString(); assert(stripSemis(names.length, res)[0].equals(name)); assert(stripSemis(names.length, res)[1].equals(names[0])); assert(names.length == 1 || stripSemis(names.length, res)[2].equals(names[1])); return res; } static String[] stripSemis(int count, String string) { String[] res = new String[count+1]; int pos = 0; for (int i = 0; i < count; i++) { int pos2 = string.indexOf(';', pos); if (pos2 < 0) pos2 = string.length(); // yuck res[i] = string.substring(pos, pos2); pos = pos2; } res[count] = string.substring(pos); return res; } public String toString() { StringBuilder buf = new StringBuilder(this.getClass().getName()); buf.append("{"); Object[] origCP = null; for (int i = 0; i < patchArray.length; i++) { if (patchArray[i] == null) continue; if (origCP != null) { buf.append(", "); } else { try { origCP = getOriginalCP(); } catch (InvalidConstantPoolFormatException ee) { origCP = new Object[0]; } } Object orig = (i < origCP.length) ? origCP[i] : "?"; buf.append(orig).append("=").append(patchArray[i]); } buf.append("}");Lines 1–500 of 503. 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/* * Copyright (c) 2008, 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 sun.invoke.anon; import java.io.IOException; import java.io.OutputStream; import java.util.Arrays; import java.util.HashSet; import java.util.IdentityHashMap; import java.util.Map; import static sun.invoke.anon.ConstantPoolVisitor.*; /** A class and its patched constant pool. * * This class allow to modify (patch) a constant pool * by changing the value of its entry. * Entry are referenced using index that can be get * by parsing the constant pool using * {@link ConstantPoolParser#parse(ConstantPoolVisitor)}. * * @see ConstantPoolVisitor * @see ConstantPoolParser#createPatch() */ public class ConstantPoolPatch { final ConstantPoolParser outer; final Object[] patchArray; ConstantPoolPatch(ConstantPoolParser outer) { this.outer = outer; this.patchArray = new Object[outer.getLength()]; } /** Create a {@link ConstantPoolParser} and * a {@link ConstantPoolPatch} in one step. * Equivalent to {@code new ConstantPoolParser(classFile).createPatch()}. * * @param classFile an array of bytes containing a class. * @see #ConstantPoolParser(Class) */ public ConstantPoolPatch(byte[] classFile) throws InvalidConstantPoolFormatException { this(new ConstantPoolParser(classFile)); } /** Create a {@link ConstantPoolParser} and * a {@link ConstantPoolPatch} in one step. * Equivalent to {@code new ConstantPoolParser(templateClass).createPatch()}. * * @param templateClass the class to parse. * @see #ConstantPoolParser(Class) */ public ConstantPoolPatch(Class<?> templateClass) throws IOException, InvalidConstantPoolFormatException { this(new ConstantPoolParser(templateClass)); } /** Creates a patch from an existing patch. * All changes are copied from that patch. * @param patch a patch * * @see ConstantPoolParser#createPatch() */ public ConstantPoolPatch(ConstantPoolPatch patch) { outer = patch.outer; patchArray = patch.patchArray.clone(); } /** Which parser built this patch? */ public ConstantPoolParser getParser() { return outer; } /** Report the tag at the given index in the constant pool. */ public byte getTag(int index) { return outer.getTag(index); } /** Report the current patch at the given index of the constant pool. * Null means no patch will be made. * To observe the unpatched entry at the given index, use * {@link #getParser()}{@code .}@link ConstantPoolParser#parse(ConstantPoolVisitor)} */ public Object getPatch(int index) { Object value = patchArray[index]; if (value == null) return null; switch (getTag(index)) { case CONSTANT_Fieldref: case CONSTANT_Methodref: case CONSTANT_InterfaceMethodref: if (value instanceof String) value = stripSemis(2, (String) value); break; case CONSTANT_NameAndType: if (value instanceof String) value = stripSemis(1, (String) value); break; } return value; } /** Clear all patches. */ public void clear() { Arrays.fill(patchArray, null); } /** Clear one patch. */ public void clear(int index) { patchArray[index] = null; } /** Produce the patches as an array. */ public Object[] getPatches() { return patchArray.clone(); } /** Produce the original constant pool as an array. */ public Object[] getOriginalCP() throws InvalidConstantPoolFormatException { return getOriginalCP(0, patchArray.length, -1); } /** Walk the constant pool, applying patches using the given map. * * @param utf8Map Utf8 strings to modify, if encountered * @param classMap Classes (or their names) to modify, if encountered * @param valueMap Constant values to modify, if encountered * @param deleteUsedEntries if true, delete map entries that are used */ public void putPatches(final Map<String,String> utf8Map, final Map<String,Object> classMap, final Map<Object,Object> valueMap, boolean deleteUsedEntries) throws InvalidConstantPoolFormatException { final HashSet<String> usedUtf8Keys; final HashSet<String> usedClassKeys; final HashSet<Object> usedValueKeys; if (deleteUsedEntries) { usedUtf8Keys = (utf8Map == null) ? null : new HashSet<String>(); usedClassKeys = (classMap == null) ? null : new HashSet<String>(); usedValueKeys = (valueMap == null) ? null : new HashSet<Object>(); } else { usedUtf8Keys = null; usedClassKeys = null; usedValueKeys = null; } outer.parse(new ConstantPoolVisitor() { @Override public void visitUTF8(int index, byte tag, String utf8) { putUTF8(index, utf8Map.get(utf8)); if (usedUtf8Keys != null) usedUtf8Keys.add(utf8); } @Override public void visitConstantValue(int index, byte tag, Object value) { putConstantValue(index, tag, valueMap.get(value)); if (usedValueKeys != null) usedValueKeys.add(value); } @Override public void visitConstantString(int index, byte tag, String name, int nameIndex) { if (tag == CONSTANT_Class) { putConstantValue(index, tag, classMap.get(name)); if (usedClassKeys != null) usedClassKeys.add(name); } else { assert(tag == CONSTANT_String); visitConstantValue(index, tag, name); } } }); if (usedUtf8Keys != null) utf8Map.keySet().removeAll(usedUtf8Keys); if (usedClassKeys != null) classMap.keySet().removeAll(usedClassKeys); if (usedValueKeys != null) valueMap.keySet().removeAll(usedValueKeys); } Object[] getOriginalCP(final int startIndex, final int endIndex, final int tagMask) throws InvalidConstantPoolFormatException { final Object[] cpArray = new Object[endIndex - startIndex]; outer.parse(new ConstantPoolVisitor() { void show(int index, byte tag, Object value) { if (index < startIndex || index >= endIndex) return; if (((1 << tag) & tagMask) == 0) return; cpArray[index - startIndex] = value; } @Override public void visitUTF8(int index, byte tag, String utf8) { show(index, tag, utf8); } @Override public void visitConstantValue(int index, byte tag, Object value) { assert(tag != CONSTANT_String); show(index, tag, value); } @Override public void visitConstantString(int index, byte tag, String value, int j) { show(index, tag, value); } @Override public void visitMemberRef(int index, byte tag, String className, String memberName, String signature, int j, int k) { show(index, tag, new String[]{ className, memberName, signature }); } @Override public void visitDescriptor(int index, byte tag, String memberName, String signature, int j, int k) { show(index, tag, new String[]{ memberName, signature }); } }); return cpArray; } /** Write the head (header plus constant pool) * of the patched class file to the indicated stream. */ void writeHead(OutputStream out) throws IOException { outer.writePatchedHead(out, patchArray); } /** Write the tail (everything after the constant pool) * of the patched class file to the indicated stream. */ void writeTail(OutputStream out) throws IOException { outer.writeTail(out); } private void checkConstantTag(byte tag, Object value) { if (value == null) throw new IllegalArgumentException( "invalid null constant value"); if (classForTag(tag) != value.getClass()) throw new IllegalArgumentException( "invalid constant value" + (tag == CONSTANT_None ? "" : " for tag "+tagName(tag)) + " of class "+value.getClass()); } private void checkTag(int index, byte putTag) { byte tag = outer.tags[index]; if (tag != putTag) throw new IllegalArgumentException( "invalid put operation" + " for " + tagName(putTag) + " at index " + index + " found " + tagName(tag)); } private void checkTagMask(int index, int tagBitMask) { byte tag = outer.tags[index]; int tagBit = ((tag & 0x1F) == tag) ? (1 << tag) : 0; if ((tagBit & tagBitMask) == 0) throw new IllegalArgumentException( "invalid put operation" + " at index " + index + " found " + tagName(tag)); } private static void checkMemberName(String memberName) { if (memberName.indexOf(';') >= 0) throw new IllegalArgumentException("memberName " + memberName + " contains a ';'"); } /** Set the entry of the constant pool indexed by index to * a new string. * * @param index an index to a constant pool entry containing a * {@link ConstantPoolVisitor#CONSTANT_Utf8} value. * @param utf8 a string * * @see ConstantPoolVisitor#visitUTF8(int, byte, String) */ public void putUTF8(int index, String utf8) { if (utf8 == null) { clear(index); return; } checkTag(index, CONSTANT_Utf8); patchArray[index] = utf8; } /** Set the entry of the constant pool indexed by index to * a new value, depending on its dynamic type. * * @param index an index to a constant pool entry containing a * one of the following structures: * {@link ConstantPoolVisitor#CONSTANT_Integer}, * {@link ConstantPoolVisitor#CONSTANT_Float}, * {@link ConstantPoolVisitor#CONSTANT_Long}, * {@link ConstantPoolVisitor#CONSTANT_Double}, * {@link ConstantPoolVisitor#CONSTANT_String}, or * {@link ConstantPoolVisitor#CONSTANT_Class} * @param value a boxed int, float, long or double; or a string or class object * @throws IllegalArgumentException if the type of the constant does not * match the constant pool entry type, * as reported by {@link #getTag(int)} * * @see #putConstantValue(int, byte, Object) * @see ConstantPoolVisitor#visitConstantValue(int, byte, Object) * @see ConstantPoolVisitor#visitConstantString(int, byte, String, int) */ public void putConstantValue(int index, Object value) { if (value == null) { clear(index); return; } byte tag = tagForConstant(value.getClass()); checkConstantTag(tag, value); checkTag(index, tag); patchArray[index] = value; } /** Set the entry of the constant pool indexed by index to * a new value. * * @param index an index to a constant pool entry matching the given tag * @param tag one of the following values: * {@link ConstantPoolVisitor#CONSTANT_Integer}, * {@link ConstantPoolVisitor#CONSTANT_Float}, * {@link ConstantPoolVisitor#CONSTANT_Long}, * {@link ConstantPoolVisitor#CONSTANT_Double}, * {@link ConstantPoolVisitor#CONSTANT_String}, or * {@link ConstantPoolVisitor#CONSTANT_Class} * @param value a boxed number, string, or class object * @throws IllegalArgumentException if the type of the constant does not * match the constant pool entry type, or if a class name contains * '/' or ';' * * @see #putConstantValue(int, Object) * @see ConstantPoolVisitor#visitConstantValue(int, byte, Object) * @see ConstantPoolVisitor#visitConstantString(int, byte, String, int) */ public void putConstantValue(int index, byte tag, Object value) { if (value == null) { clear(index); return; } checkTag(index, tag); if (tag == CONSTANT_Class && value instanceof String) { checkClassName((String) value); } else if (tag == CONSTANT_String) { // the JVM accepts any object as a patch for a string } else { // make sure the incoming value is the right type checkConstantTag(tag, value); } checkTag(index, tag); patchArray[index] = value; } /** Set the entry of the constant pool indexed by index to * a new {@link ConstantPoolVisitor#CONSTANT_NameAndType} value. * * @param index an index to a constant pool entry containing a * {@link ConstantPoolVisitor#CONSTANT_NameAndType} value. * @param memberName a memberName * @param signature a signature * @throws IllegalArgumentException if memberName contains the character ';' * * @see ConstantPoolVisitor#visitDescriptor(int, byte, String, String, int, int) */ public void putDescriptor(int index, String memberName, String signature) { checkTag(index, CONSTANT_NameAndType); checkMemberName(memberName); patchArray[index] = addSemis(memberName, signature); } /** Set the entry of the constant pool indexed by index to * a new {@link ConstantPoolVisitor#CONSTANT_Fieldref}, * {@link ConstantPoolVisitor#CONSTANT_Methodref}, or * {@link ConstantPoolVisitor#CONSTANT_InterfaceMethodref} value. * * @param index an index to a constant pool entry containing a member reference * @param className a class name * @param memberName a field or method name * @param signature a field or method signature * @throws IllegalArgumentException if memberName contains the character ';' * or signature is not a correct signature * * @see ConstantPoolVisitor#visitMemberRef(int, byte, String, String, String, int, int) */ public void putMemberRef(int index, byte tag, String className, String memberName, String signature) { checkTagMask(tag, CONSTANT_MemberRef_MASK); checkTag(index, tag); checkClassName(className); checkMemberName(memberName); if (signature.startsWith("(") == (tag == CONSTANT_Fieldref)) throw new IllegalArgumentException("bad signature: "+signature); patchArray[index] = addSemis(className, memberName, signature); } static private final int CONSTANT_MemberRef_MASK = CONSTANT_Fieldref | CONSTANT_Methodref | CONSTANT_InterfaceMethodref; private static final Map<Class<?>, Byte> CONSTANT_VALUE_CLASS_TAG = new IdentityHashMap<Class<?>, Byte>(); private static final Class[] CONSTANT_VALUE_CLASS = new Class[16]; static { Object[][] values = { {Integer.class, CONSTANT_Integer}, {Long.class, CONSTANT_Long}, {Float.class, CONSTANT_Float}, {Double.class, CONSTANT_Double}, {String.class, CONSTANT_String}, {Class.class, CONSTANT_Class} }; for (Object[] value : values) { Class<?> cls = (Class<?>)value[0]; Byte tag = (Byte) value[1]; CONSTANT_VALUE_CLASS_TAG.put(cls, tag); CONSTANT_VALUE_CLASS[(byte)tag] = cls; } } static Class<?> classForTag(byte tag) { if ((tag & 0xFF) >= CONSTANT_VALUE_CLASS.length) return null; return CONSTANT_VALUE_CLASS[tag]; } static byte tagForConstant(Class<?> cls) { Byte tag = CONSTANT_VALUE_CLASS_TAG.get(cls); return (tag == null) ? CONSTANT_None : (byte)tag; } private static void checkClassName(String className) { if (className.indexOf('/') >= 0 || className.indexOf(';') >= 0) throw new IllegalArgumentException("invalid class name " + className); } static String addSemis(String name, String... names) { StringBuilder buf = new StringBuilder(name.length() * 5); buf.append(name); for (String name2 : names) { buf.append(';').append(name2); } String res = buf.toString(); assert(stripSemis(names.length, res)[0].equals(name)); assert(stripSemis(names.length, res)[1].equals(names[0])); assert(names.length == 1 || stripSemis(names.length, res)[2].equals(names[1])); return res; } static String[] stripSemis(int count, String string) { String[] res = new String[count+1]; int pos = 0; for (int i = 0; i < count; i++) { int pos2 = string.indexOf(';', pos); if (pos2 < 0) pos2 = string.length(); // yuck res[i] = string.substring(pos, pos2); pos = pos2; } res[count] = string.substring(pos); return res; } public String toString() { StringBuilder buf = new StringBuilder(this.getClass().getName()); buf.append("{"); Object[] origCP = null; for (int i = 0; i < patchArray.length; i++) { if (patchArray[i] == null) continue; if (origCP != null) { buf.append(", "); } else { try { origCP = getOriginalCP(); } catch (InvalidConstantPoolFormatException ee) { origCP = new Object[0]; } } Object orig = (i < origCP.length) ? origCP[i] : "?"; buf.append(orig).append("=").append(patchArray[i]); } buf.append("}");