jdk8-mips64-public/langtools: comparison src/share/classes/com/sun/tools/javap/ClassWriter.java

-:f7e64b33d5a4
+:7708bd6d800d
+/*
+* Copyright 2007 Sun Microsystems, Inc.  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.  Sun designates this
+* particular file as subject to the "Classpath" exception as provided
+* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+* CA 95054 USA or visit www.sun.com if you need additional information or
+* have any questions.
+*/
+package com.sun.tools.javap;
+import java.util.Collection;
+import java.util.List;
+import com.sun.tools.classfile.AccessFlags;
+import com.sun.tools.classfile.Attribute;
+import com.sun.tools.classfile.Attributes;
+import com.sun.tools.classfile.ClassFile;
+import com.sun.tools.classfile.Code_attribute;
+import com.sun.tools.classfile.ConstantPool;
+import com.sun.tools.classfile.ConstantPoolException;
+import com.sun.tools.classfile.Descriptor;
+import com.sun.tools.classfile.DescriptorException;
+import com.sun.tools.classfile.Exceptions_attribute;
+import com.sun.tools.classfile.Field;
+import com.sun.tools.classfile.Method;
+import com.sun.tools.classfile.Signature;
+import com.sun.tools.classfile.Signature_attribute;
+import com.sun.tools.classfile.SourceFile_attribute;
+import com.sun.tools.classfile.Type;
+import static com.sun.tools.classfile.AccessFlags.*;
+/*
+*  The main javap class to write the contents of a class file as text.
+*
+*  <p><b>This is NOT part of any API supported by Sun Microsystems.  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 ClassWriter extends BasicWriter {
+static ClassWriter instance(Context context) {
+ClassWriter instance = context.get(ClassWriter.class);
+if (instance == null)
+instance = new ClassWriter(context);
+return instance;
+}
+protected ClassWriter(Context context) {
+super(context);
+context.put(ClassWriter.class, this);
+options = Options.instance(context);
+attrWriter = AttributeWriter.instance(context);
+codeWriter = CodeWriter.instance(context);
+constantWriter = ConstantWriter.instance(context);
+}
+ClassFile getClassFile() {
+return classFile;
+}
+Method getMethod() {
+return method;
+}
+public void write(ClassFile cf) {
+classFile = cf;
+constant_pool = classFile.constant_pool;
+Attribute sfa = cf.getAttribute(Attribute.SourceFile);
+if (sfa instanceof SourceFile_attribute) {
+println("Compiled from \"" + getSourceFile((SourceFile_attribute) sfa) + "\"");
+}
+String name = getJavaName(classFile);
+AccessFlags flags = cf.access_flags;
+writeModifiers(flags.getClassModifiers());
+if (classFile.isClass())
+print("class ");
+else if (classFile.isInterface())
+print("interface ");
+print(name);
+Signature_attribute sigAttr = getSignature(cf.attributes);
+if (sigAttr == null) {
+// use info from class file header
+if (classFile.isClass()) {
+if (classFile.super_class != 0 ) {
+String sn = getJavaSuperclassName(cf);
+if (!sn.equals("java.lang.Object") || options.compat) { // BUG XXXXXXXX
+print(" extends ");
+print(sn);
+}
+}
+}
+for (int i = 0; i < classFile.interfaces.length; i++) {
+print(i == 0 ? (classFile.isClass() ? " implements " : " extends ") : ",");
+print(getJavaInterfaceName(classFile, i));
+}
+} else {
+try {
+Type t = sigAttr.getParsedSignature().getType(constant_pool);
+// The signature parser cannot disambiguate between a
+// FieldType and a ClassSignatureType that only contains a superclass type.
+if (t instanceof Type.ClassSigType)
+print(t);
+else if (!t.isObject()) {
+print(" extends ");
+print(t);
+}
+} catch (ConstantPoolException e) {
+print(report(e));
+}
+}
+if (options.verbose) {
+println();
+attrWriter.write(cf, cf.attributes, constant_pool);
+println("  minor version: " + cf.minor_version);
+println("  major version: " + cf.major_version);
+if (!options.compat)
+writeList("  flags: ", flags.getClassFlags(), NEWLINE);
+constantWriter.writeConstantPool();
+println();
+} else {
+if (!options.compat)
+print(" ");
+}
+println("{");
+writeFields();
+writeMethods();
+println("}");
+println();
+}
+void writeFields() {
+for (Field f: classFile.fields) {
+writeField(f);
+}
+}
+void writeField(Field f) {
+if (!options.checkAccess(f.access_flags))
+return;
+if (!(options.showLineAndLocalVariableTables
+|| options.showDisassembled
+|| options.verbose
+|| options.showInternalSignatures
+|| options.showAllAttrs)) {
+print("    ");
+}
+AccessFlags flags = f.access_flags;
+writeModifiers(flags.getFieldModifiers());
+Signature_attribute sigAttr = getSignature(f.attributes);
+if (sigAttr == null)
+print(getFieldType(f.descriptor));
+else {
+try {
+Type t = sigAttr.getParsedSignature().getType(constant_pool);
+print(t);
+} catch (ConstantPoolException e) {
+// report error?
+// fall back on non-generic descriptor
+print(getFieldType(f.descriptor));
+}
+}
+print(" ");
+print(getFieldName(f));
+print(";");
+println();
+if (options.showInternalSignatures)
+println("  Signature: " + getValue(f.descriptor));
+if (options.verbose && !options.compat)
+writeList("  flags: ", flags.getFieldFlags(), NEWLINE);
+if (options.showAllAttrs) {
+for (Attribute attr: f.attributes)
+attrWriter.write(f, attr, constant_pool);
+println();
+}
+if (options.showDisassembled || options.showLineAndLocalVariableTables)
+println();
+}
+void writeMethods() {
+for (Method m: classFile.methods)
+writeMethod(m);
+}
+void writeMethod(Method m) {
+if (!options.checkAccess(m.access_flags))
+return;
+method = m;
+if (!(options.showLineAndLocalVariableTables
+|| options.showDisassembled
+|| options.verbose
+|| options.showInternalSignatures
+|| options.showAllAttrs)) {
+print("    ");
+}
+AccessFlags flags = m.access_flags;
+Descriptor d;
+Type.MethodType methodType;
+List<? extends Type> methodExceptions;
+Signature_attribute sigAttr = getSignature(m.attributes);
+if (sigAttr == null) {
+d = m.descriptor;
+methodType = null;
+methodExceptions = null;
+} else {
+Signature methodSig = sigAttr.getParsedSignature();
+d = methodSig;
+try {
+methodType = (Type.MethodType) methodSig.getType(constant_pool);
+methodExceptions = methodType.throwsTypes;
+if (methodExceptions != null && methodExceptions.size() == 0)
+methodExceptions = null;
+} catch (ConstantPoolException e) {
+// report error?
+// fall back on standard descriptor
+methodType = null;
+methodExceptions = null;
+}
+}
+writeModifiers(flags.getMethodModifiers());
+if (methodType != null) {
+writeListIfNotEmpty("<", methodType.typeArgTypes, "> ");
+}
+if (getName(m).equals("<init>")) {
+print(getJavaName(classFile));
+print(getParameterTypes(d, flags));
+} else if (getName(m).equals("<clinit>")) {
+print("{}");
+} else {
+print(getReturnType(d));
+print(" ");
+print(getName(m));
+print(getParameterTypes(d, flags));
+}
+Attribute e_attr = m.attributes.get(Attribute.Exceptions);
+if (e_attr != null) { // if there are generic exceptions, there must be erased exceptions
+if (e_attr instanceof Exceptions_attribute) {
+Exceptions_attribute exceptions = (Exceptions_attribute) e_attr;
+if (options.compat) { // Bug XXXXXXX whitespace
+if (!(options.showLineAndLocalVariableTables
+|| options.showDisassembled
+|| options.verbose
+|| options.showInternalSignatures
+|| options.showAllAttrs)) {
+print("    ");
+}
+print("  ");
+}
+print(" throws ");
+if (methodExceptions != null) { // use generic list if available
+writeList("", methodExceptions, "");
+} else {
+for (int i = 0; i < exceptions.number_of_exceptions; i++) {
+if (i > 0)
+print(", ");
+print(attrWriter.getJavaException(exceptions, i));
+}
+}
+} else {
+report("Unexpected or invalid value for Exceptions attribute");
+}
+}
+print(";");
+println();
+if (options.showInternalSignatures)
+println("  Signature: " + getValue(m.descriptor));
+if (options.verbose && !options.compat)
+writeList("  flags: ", flags.getMethodFlags(), NEWLINE);
+Code_attribute code = null;
+Attribute c_attr = m.attributes.get(Attribute.Code);
+if (c_attr != null) {
+if (c_attr instanceof Code_attribute)
+code = (Code_attribute) c_attr;
+else
+report("Unexpected or invalid value for Code attribute");
+}
+if (options.showDisassembled && !options.showAllAttrs) {
+if (code != null) {
+println("  Code:");
+codeWriter.writeInstrs(code);
+codeWriter.writeExceptionTable(code);
+}
+println();
+}
+if (options.showLineAndLocalVariableTables) {
+if (code != null)
+attrWriter.write(code, code.attributes.get(Attribute.LineNumberTable), constant_pool);
+println();
+if (code != null)
+attrWriter.write(code, code.attributes.get(Attribute.LocalVariableTable), constant_pool);
+println();
+println();
+}
+if (options.showAllAttrs) {
+Attribute[] attrs = m.attributes.attrs;
+for (Attribute attr: attrs)
+attrWriter.write(m, attr, constant_pool);
+//            // the following condition is to mimic old javap
+//            if (!(attrs.length > 0 &&
+//                    attrs[attrs.length - 1] instanceof Exceptions_attribute))
+println();
+}
+}
+void writeModifiers(Collection<String> items) {
+for (Object item: items) {
+print(item);
+print(" ");
+}
+}
+void writeList(String prefix, Collection<?> items, String suffix) {
+print(prefix);
+String sep = "";
+for (Object item: items) {
+print(sep);
+print(item);
+sep = ", ";
+}
+print(suffix);
+}
+void writeListIfNotEmpty(String prefix, List<?> items, String suffix) {
+if (items != null && items.size() > 0)
+writeList(prefix, items, suffix);
+}
+Signature_attribute getSignature(Attributes attributes) {
+if (options.compat) // javap does not recognize recent attributes
+return null;
+return (Signature_attribute) attributes.get(Attribute.Signature);
+}
+String adjustVarargs(AccessFlags flags, String params) {
+if (flags.is(ACC_VARARGS) && !options.compat) {
+int i = params.lastIndexOf("[]");
+if (i > 0)
+return params.substring(0, i) + "..." + params.substring(i+2);
+}
+return params;
+}
+String getJavaName(ClassFile cf) {
+try {
+return getJavaName(cf.getName());
+} catch (ConstantPoolException e) {
+return report(e);
+}
+}
+String getJavaSuperclassName(ClassFile cf) {
+try {
+return getJavaName(cf.getSuperclassName());
+} catch (ConstantPoolException e) {
+return report(e);
+}
+}
+String getJavaInterfaceName(ClassFile cf, int index) {
+try {
+return getJavaName(cf.getInterfaceName(index));
+} catch (ConstantPoolException e) {
+return report(e);
+}
+}
+String getFieldType(Descriptor d) {
+try {
+return d.getFieldType(constant_pool);
+} catch (ConstantPoolException e) {
+return report(e);
+} catch (DescriptorException e) {
+return report(e);
+}
+}
+String getReturnType(Descriptor d) {
+try {
+return d.getReturnType(constant_pool);
+} catch (ConstantPoolException e) {
+return report(e);
+} catch (DescriptorException e) {
+return report(e);
+}
+}
+String getParameterTypes(Descriptor d, AccessFlags flags) {
+try {
+return adjustVarargs(flags, d.getParameterTypes(constant_pool));
+} catch (ConstantPoolException e) {
+return report(e);
+} catch (DescriptorException e) {
+return report(e);
+}
+}
+String getValue(Descriptor d) {
+try {
+return d.getValue(constant_pool);
+} catch (ConstantPoolException e) {
+return report(e);
+}
+}
+String getFieldName(Field f) {
+try {
+return f.getName(constant_pool);
+} catch (ConstantPoolException e) {
+return report(e);
+}
+}
+String getName(Method m) {
+try {
+return m.getName(constant_pool);
+} catch (ConstantPoolException e) {
+return report(e);
+}
+}
+static String getJavaName(String name) {
+return name.replace('/', '.');
+}
+String getSourceFile(SourceFile_attribute attr) {
+try {
+return attr.getSourceFile(constant_pool);
+} catch (ConstantPoolException e) {
+return report(e);
+}
+}
+private Options options;
+private AttributeWriter attrWriter;
+private CodeWriter codeWriter;
+private ConstantWriter constantWriter;
+private ClassFile classFile;
+private ConstantPool constant_pool;
+private Method method;
+private static final String NEWLINE = System.getProperty("line.separator", "\n");
+}

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

comparison: src/share/classes/com/sun/tools/javap/ClassWriter.java

src/share/classes/com/sun/tools/javap/ClassWriter.java