--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.jdeps/share/classes/com/sun/tools/classfile/ClassTranslator.java Wed May 27 13:25:18 2015 -0700
@@ -0,0 +1,410 @@
+/*
+ * Copyright (c) 2008, 2012, 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.util.Map;
+
+import com.sun.tools.classfile.ConstantPool.CONSTANT_Class_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_Double_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_Fieldref_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_Float_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_Integer_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_InterfaceMethodref_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_InvokeDynamic_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_Long_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_MethodHandle_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_MethodType_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_Methodref_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_NameAndType_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_String_info;
+import com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8_info;
+import com.sun.tools.classfile.ConstantPool.CPInfo;
+
+/**
+ * Rewrites a class file using a map of translations.
+ *
+ * <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 ClassTranslator
+ implements ConstantPool.Visitor<ConstantPool.CPInfo,Map<Object,Object>> {
+ /**
+ * Create a new ClassFile from {@code cf}, such that for all entries
+ * {@code k -\> v} in {@code translations},
+ * each occurrence of {@code k} in {@code cf} will be replaced by {@code v}.
+ * in
+ * @param cf the class file to be processed
+ * @param translations the set of translations to be applied
+ * @return a copy of {@code} with the values in {@code translations} substituted
+ */
+ public ClassFile translate(ClassFile cf, Map<Object,Object> translations) {
+ ClassFile cf2 = (ClassFile) translations.get(cf);
+ if (cf2 == null) {
+ ConstantPool constant_pool2 = translate(cf.constant_pool, translations);
+ Field[] fields2 = translate(cf.fields, cf.constant_pool, translations);
+ Method[] methods2 = translateMethods(cf.methods, cf.constant_pool, translations);
+ Attributes attributes2 = translateAttributes(cf.attributes, cf.constant_pool,
+ translations);
+
+ if (constant_pool2 == cf.constant_pool &&
+ fields2 == cf.fields &&
+ methods2 == cf.methods &&
+ attributes2 == cf.attributes)
+ cf2 = cf;
+ else
+ cf2 = new ClassFile(
+ cf.magic,
+ cf.minor_version,
+ cf.major_version,
+ constant_pool2,
+ cf.access_flags,
+ cf.this_class,
+ cf.super_class,
+ cf.interfaces,
+ fields2,
+ methods2,
+ attributes2);
+ translations.put(cf, cf2);
+ }
+ return cf2;
+ }
+
+ ConstantPool translate(ConstantPool cp, Map<Object,Object> translations) {
+ ConstantPool cp2 = (ConstantPool) translations.get(cp);
+ if (cp2 == null) {
+ ConstantPool.CPInfo[] pool2 = new ConstantPool.CPInfo[cp.size()];
+ boolean eq = true;
+ for (int i = 0; i < cp.size(); ) {
+ ConstantPool.CPInfo cpInfo;
+ try {
+ cpInfo = cp.get(i);
+ } catch (ConstantPool.InvalidIndex e) {
+ throw new IllegalStateException(e);
+ }
+ ConstantPool.CPInfo cpInfo2 = translate(cpInfo, translations);
+ eq &= (cpInfo == cpInfo2);
+ pool2[i] = cpInfo2;
+ if (cpInfo.getTag() != cpInfo2.getTag())
+ throw new IllegalStateException();
+ i += cpInfo.size();
+ }
+
+ if (eq)
+ cp2 = cp;
+ else
+ cp2 = new ConstantPool(pool2);
+
+ translations.put(cp, cp2);
+ }
+ return cp2;
+ }
+
+ ConstantPool.CPInfo translate(ConstantPool.CPInfo cpInfo, Map<Object,Object> translations) {
+ ConstantPool.CPInfo cpInfo2 = (ConstantPool.CPInfo) translations.get(cpInfo);
+ if (cpInfo2 == null) {
+ cpInfo2 = cpInfo.accept(this, translations);
+ translations.put(cpInfo, cpInfo2);
+ }
+ return cpInfo2;
+ }
+
+ Field[] translate(Field[] fields, ConstantPool constant_pool, Map<Object,Object> translations) {
+ Field[] fields2 = (Field[]) translations.get(fields);
+ if (fields2 == null) {
+ fields2 = new Field[fields.length];
+ for (int i = 0; i < fields.length; i++)
+ fields2[i] = translate(fields[i], constant_pool, translations);
+ if (equal(fields, fields2))
+ fields2 = fields;
+ translations.put(fields, fields2);
+ }
+ return fields2;
+ }
+
+ Field translate(Field field, ConstantPool constant_pool, Map<Object,Object> translations) {
+ Field field2 = (Field) translations.get(field);
+ if (field2 == null) {
+ Attributes attributes2 = translateAttributes(field.attributes, constant_pool,
+ translations);
+
+ if (attributes2 == field.attributes)
+ field2 = field;
+ else
+ field2 = new Field(
+ field.access_flags,
+ field.name_index,
+ field.descriptor,
+ attributes2);
+ translations.put(field, field2);
+ }
+ return field2;
+ }
+
+ Method[] translateMethods(Method[] methods, ConstantPool constant_pool, Map<Object,Object> translations) {
+ Method[] methods2 = (Method[]) translations.get(methods);
+ if (methods2 == null) {
+ methods2 = new Method[methods.length];
+ for (int i = 0; i < methods.length; i++)
+ methods2[i] = translate(methods[i], constant_pool, translations);
+ if (equal(methods, methods2))
+ methods2 = methods;
+ translations.put(methods, methods2);
+ }
+ return methods2;
+ }
+
+ Method translate(Method method, ConstantPool constant_pool, Map<Object,Object> translations) {
+ Method method2 = (Method) translations.get(method);
+ if (method2 == null) {
+ Attributes attributes2 = translateAttributes(method.attributes, constant_pool,
+ translations);
+
+ if (attributes2 == method.attributes)
+ method2 = method;
+ else
+ method2 = new Method(
+ method.access_flags,
+ method.name_index,
+ method.descriptor,
+ attributes2);
+ translations.put(method, method2);
+ }
+ return method2;
+ }
+
+ Attributes translateAttributes(Attributes attributes,
+ ConstantPool constant_pool, Map<Object,Object> translations) {
+ Attributes attributes2 = (Attributes) translations.get(attributes);
+ if (attributes2 == null) {
+ Attribute[] attrArray2 = new Attribute[attributes.size()];
+ ConstantPool constant_pool2 = translate(constant_pool, translations);
+ boolean attrsEqual = true;
+ for (int i = 0; i < attributes.size(); i++) {
+ Attribute attr = attributes.get(i);
+ Attribute attr2 = translate(attr, translations);
+ if (attr2 != attr)
+ attrsEqual = false;
+ attrArray2[i] = attr2;
+ }
+ if ((constant_pool2 == constant_pool) && attrsEqual)
+ attributes2 = attributes;
+ else
+ attributes2 = new Attributes(constant_pool2, attrArray2);
+ translations.put(attributes, attributes2);
+ }
+ return attributes2;
+ }
+
+ Attribute translate(Attribute attribute, Map<Object,Object> translations) {
+ Attribute attribute2 = (Attribute) translations.get(attribute);
+ if (attribute2 == null) {
+ attribute2 = attribute; // don't support translation within attributes yet
+ // (what about Code attribute)
+ translations.put(attribute, attribute2);
+ }
+ return attribute2;
+ }
+
+ private static <T> boolean equal(T[] a1, T[] a2) {
+ if (a1 == null || a2 == null)
+ return (a1 == a2);
+ if (a1.length != a2.length)
+ return false;
+ for (int i = 0; i < a1.length; i++) {
+ if (a1[i] != a2[i])
+ return false;
+ }
+ return true;
+ }
+
+ public CPInfo visitClass(CONSTANT_Class_info info, Map<Object, Object> translations) {
+ CONSTANT_Class_info info2 = (CONSTANT_Class_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp)
+ info2 = info;
+ else
+ info2 = new CONSTANT_Class_info(cp2, info.name_index);
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitDouble(CONSTANT_Double_info info, Map<Object, Object> translations) {
+ CONSTANT_Double_info info2 = (CONSTANT_Double_info) translations.get(info);
+ if (info2 == null) {
+ info2 = info;
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitFieldref(CONSTANT_Fieldref_info info, Map<Object, Object> translations) {
+ CONSTANT_Fieldref_info info2 = (CONSTANT_Fieldref_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp)
+ info2 = info;
+ else
+ info2 = new CONSTANT_Fieldref_info(cp2, info.class_index, info.name_and_type_index);
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitFloat(CONSTANT_Float_info info, Map<Object, Object> translations) {
+ CONSTANT_Float_info info2 = (CONSTANT_Float_info) translations.get(info);
+ if (info2 == null) {
+ info2 = info;
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitInteger(CONSTANT_Integer_info info, Map<Object, Object> translations) {
+ CONSTANT_Integer_info info2 = (CONSTANT_Integer_info) translations.get(info);
+ if (info2 == null) {
+ info2 = info;
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, Map<Object, Object> translations) {
+ CONSTANT_InterfaceMethodref_info info2 = (CONSTANT_InterfaceMethodref_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp)
+ info2 = info;
+ else
+ info2 = new CONSTANT_InterfaceMethodref_info(cp2, info.class_index, info.name_and_type_index);
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitInvokeDynamic(CONSTANT_InvokeDynamic_info info, Map<Object, Object> translations) {
+ CONSTANT_InvokeDynamic_info info2 = (CONSTANT_InvokeDynamic_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp) {
+ info2 = info;
+ } else {
+ info2 = new CONSTANT_InvokeDynamic_info(cp2, info.bootstrap_method_attr_index, info.name_and_type_index);
+ }
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitLong(CONSTANT_Long_info info, Map<Object, Object> translations) {
+ CONSTANT_Long_info info2 = (CONSTANT_Long_info) translations.get(info);
+ if (info2 == null) {
+ info2 = info;
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitNameAndType(CONSTANT_NameAndType_info info, Map<Object, Object> translations) {
+ CONSTANT_NameAndType_info info2 = (CONSTANT_NameAndType_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp)
+ info2 = info;
+ else
+ info2 = new CONSTANT_NameAndType_info(cp2, info.name_index, info.type_index);
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitMethodref(CONSTANT_Methodref_info info, Map<Object, Object> translations) {
+ CONSTANT_Methodref_info info2 = (CONSTANT_Methodref_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp)
+ info2 = info;
+ else
+ info2 = new CONSTANT_Methodref_info(cp2, info.class_index, info.name_and_type_index);
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitMethodHandle(CONSTANT_MethodHandle_info info, Map<Object, Object> translations) {
+ CONSTANT_MethodHandle_info info2 = (CONSTANT_MethodHandle_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp) {
+ info2 = info;
+ } else {
+ info2 = new CONSTANT_MethodHandle_info(cp2, info.reference_kind, info.reference_index);
+ }
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitMethodType(CONSTANT_MethodType_info info, Map<Object, Object> translations) {
+ CONSTANT_MethodType_info info2 = (CONSTANT_MethodType_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp) {
+ info2 = info;
+ } else {
+ info2 = new CONSTANT_MethodType_info(cp2, info.descriptor_index);
+ }
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitString(CONSTANT_String_info info, Map<Object, Object> translations) {
+ CONSTANT_String_info info2 = (CONSTANT_String_info) translations.get(info);
+ if (info2 == null) {
+ ConstantPool cp2 = translate(info.cp, translations);
+ if (cp2 == info.cp)
+ info2 = info;
+ else
+ info2 = new CONSTANT_String_info(cp2, info.string_index);
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+ public CPInfo visitUtf8(CONSTANT_Utf8_info info, Map<Object, Object> translations) {
+ CONSTANT_Utf8_info info2 = (CONSTANT_Utf8_info) translations.get(info);
+ if (info2 == null) {
+ info2 = info;
+ translations.put(info, info2);
+ }
+ return info;
+ }
+
+}