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Diffstat (limited to 'src/proguard/classfile/io/LibraryClassReader.java')
| -rw-r--r-- | src/proguard/classfile/io/LibraryClassReader.java | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/src/proguard/classfile/io/LibraryClassReader.java b/src/proguard/classfile/io/LibraryClassReader.java deleted file mode 100644 index a9a4e8e..0000000 --- a/src/proguard/classfile/io/LibraryClassReader.java +++ /dev/null @@ -1,383 +0,0 @@ -/* - * ProGuard -- shrinking, optimization, obfuscation, and preverification - * of Java bytecode. - * - * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program 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 for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -package proguard.classfile.io; - -import proguard.classfile.*; -import proguard.classfile.constant.*; -import proguard.classfile.constant.visitor.ConstantVisitor; -import proguard.classfile.util.*; -import proguard.classfile.visitor.*; - -import java.io.DataInput; - -/** - * This ClassVisitor fills out the LibraryClass objects that it visits with data - * from the given DataInput object. - * - * @author Eric Lafortune - */ -public class LibraryClassReader -extends SimplifiedVisitor -implements ClassVisitor, - MemberVisitor, - ConstantVisitor -{ - private static final LibraryField[] EMPTY_LIBRARY_FIELDS = new LibraryField[0]; - private static final LibraryMethod[] EMPTY_LIBRARY_METHODS = new LibraryMethod[0]; - - - private final RuntimeDataInput dataInput; - private final boolean skipNonPublicClasses; - private final boolean skipNonPublicClassMembers; - - // A global array that acts as a parameter for the visitor methods. - private Constant[] constantPool; - - - /** - * Creates a new ProgramClassReader for reading from the given DataInput. - */ - public LibraryClassReader(DataInput dataInput, - boolean skipNonPublicClasses, - boolean skipNonPublicClassMembers) - { - this.dataInput = new RuntimeDataInput(dataInput); - this.skipNonPublicClasses = skipNonPublicClasses; - this.skipNonPublicClassMembers = skipNonPublicClassMembers; - } - - - // Implementations for ClassVisitor. - - public void visitProgramClass(ProgramClass libraryClass) - { - } - - - public void visitLibraryClass(LibraryClass libraryClass) - { - // Read and check the magic number. - int u4magic = dataInput.readInt(); - - ClassUtil.checkMagicNumber(u4magic); - - // Read and check the version numbers. - int u2minorVersion = dataInput.readUnsignedShort(); - int u2majorVersion = dataInput.readUnsignedShort(); - - int u4version = ClassUtil.internalClassVersion(u2majorVersion, - u2minorVersion); - - ClassUtil.checkVersionNumbers(u4version); - - // Read the constant pool. Note that the first entry is not used. - int u2constantPoolCount = dataInput.readUnsignedShort(); - - // Create the constant pool array. - constantPool = new Constant[u2constantPoolCount]; - - for (int index = 1; index < u2constantPoolCount; index++) - { - Constant constant = createConstant(); - constant.accept(libraryClass, this); - - int tag = constant.getTag(); - if (tag == ClassConstants.CONSTANT_Class || - tag == ClassConstants.CONSTANT_Utf8) - { - constantPool[index] = constant; - } - - // Long constants and double constants take up two entries in the - // constant pool. - if (tag == ClassConstants.CONSTANT_Long || - tag == ClassConstants.CONSTANT_Double) - { - index++; - } - } - - // Read the general class information. - libraryClass.u2accessFlags = dataInput.readUnsignedShort(); - - // We may stop parsing this library class if it's not public anyway. - // E.g. only about 60% of all rt.jar classes need to be parsed. - if (skipNonPublicClasses && - AccessUtil.accessLevel(libraryClass.getAccessFlags()) < AccessUtil.PUBLIC) - { - return; - } - - // Read the class and super class indices. - int u2thisClass = dataInput.readUnsignedShort(); - int u2superClass = dataInput.readUnsignedShort(); - - // Store their actual names. - libraryClass.thisClassName = getClassName(u2thisClass); - libraryClass.superClassName = (u2superClass == 0) ? null : - getClassName(u2superClass); - - // Read the interfaces - int u2interfacesCount = dataInput.readUnsignedShort(); - - libraryClass.interfaceNames = new String[u2interfacesCount]; - for (int index = 0; index < u2interfacesCount; index++) - { - // Store the actual interface name. - int u2interface = dataInput.readUnsignedShort(); - libraryClass.interfaceNames[index] = getClassName(u2interface); - } - - // Read the fields. - int u2fieldsCount = dataInput.readUnsignedShort(); - - // Create the fields array. - LibraryField[] reusableFields = new LibraryField[u2fieldsCount]; - - int visibleFieldsCount = 0; - for (int index = 0; index < u2fieldsCount; index++) - { - LibraryField field = new LibraryField(); - this.visitLibraryMember(libraryClass, field); - - // Only store fields that are visible. - if (AccessUtil.accessLevel(field.getAccessFlags()) >= - (skipNonPublicClassMembers ? AccessUtil.PROTECTED : - AccessUtil.PACKAGE_VISIBLE)) - { - reusableFields[visibleFieldsCount++] = field; - } - } - - // Copy the visible fields (if any) into a fields array of the right size. - if (visibleFieldsCount == 0) - { - libraryClass.fields = EMPTY_LIBRARY_FIELDS; - } - else - { - libraryClass.fields = new LibraryField[visibleFieldsCount]; - System.arraycopy(reusableFields, 0, libraryClass.fields, 0, visibleFieldsCount); - } - - // Read the methods. - int u2methodsCount = dataInput.readUnsignedShort(); - - // Create the methods array. - LibraryMethod[] reusableMethods = new LibraryMethod[u2methodsCount]; - - int visibleMethodsCount = 0; - for (int index = 0; index < u2methodsCount; index++) - { - LibraryMethod method = new LibraryMethod(); - this.visitLibraryMember(libraryClass, method); - - // Only store methods that are visible. - if (AccessUtil.accessLevel(method.getAccessFlags()) >= - (skipNonPublicClassMembers ? AccessUtil.PROTECTED : - AccessUtil.PACKAGE_VISIBLE)) - { - reusableMethods[visibleMethodsCount++] = method; - } - } - - // Copy the visible methods (if any) into a methods array of the right size. - if (visibleMethodsCount == 0) - { - libraryClass.methods = EMPTY_LIBRARY_METHODS; - } - else - { - libraryClass.methods = new LibraryMethod[visibleMethodsCount]; - System.arraycopy(reusableMethods, 0, libraryClass.methods, 0, visibleMethodsCount); - } - - // Skip the class attributes. - skipAttributes(); - } - - - // Implementations for MemberVisitor. - - public void visitProgramMember(ProgramClass libraryClass, ProgramMember libraryMember) - { - } - - - public void visitLibraryMember(LibraryClass libraryClass, LibraryMember libraryMember) - { - // Read the general field information. - libraryMember.u2accessFlags = dataInput.readUnsignedShort(); - libraryMember.name = getString(dataInput.readUnsignedShort()); - libraryMember.descriptor = getString(dataInput.readUnsignedShort()); - - // Skip the field attributes. - skipAttributes(); - } - - - // Implementations for ConstantVisitor. - - public void visitIntegerConstant(Clazz clazz, IntegerConstant integerConstant) - { - dataInput.skipBytes(4); - } - - - public void visitLongConstant(Clazz clazz, LongConstant longConstant) - { - dataInput.skipBytes(8); - } - - - public void visitFloatConstant(Clazz clazz, FloatConstant floatConstant) - { - dataInput.skipBytes(4); - } - - - public void visitDoubleConstant(Clazz clazz, DoubleConstant doubleConstant) - { - dataInput.skipBytes(8); - } - - - public void visitStringConstant(Clazz clazz, StringConstant stringConstant) - { - dataInput.skipBytes(2); - } - - - public void visitUtf8Constant(Clazz clazz, Utf8Constant utf8Constant) - { - int u2length = dataInput.readUnsignedShort(); - - // Read the UTF-8 bytes. - byte[] bytes = new byte[u2length]; - dataInput.readFully(bytes); - utf8Constant.setBytes(bytes); - } - - - public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant) - { - dataInput.skipBytes(4); - } - - - public void visitMethodHandleConstant(Clazz clazz, MethodHandleConstant methodHandleConstant) - { - dataInput.skipBytes(3); - } - - - public void visitAnyRefConstant(Clazz clazz, RefConstant refConstant) - { - dataInput.skipBytes(4); - } - - - public void visitClassConstant(Clazz clazz, ClassConstant classConstant) - { - classConstant.u2nameIndex = dataInput.readUnsignedShort(); - } - - - public void visitMethodTypeConstant(Clazz clazz, MethodTypeConstant methodTypeConstant) - { - dataInput.skipBytes(2); - } - - - public void visitNameAndTypeConstant(Clazz clazz, NameAndTypeConstant nameAndTypeConstant) - { - dataInput.skipBytes(4); - } - - - // Small utility methods. - - /** - * Returns the class name of the ClassConstant at the specified index in the - * reusable constant pool. - */ - private String getClassName(int constantIndex) - { - ClassConstant classEntry = (ClassConstant)constantPool[constantIndex]; - - return getString(classEntry.u2nameIndex); - } - - - /** - * Returns the string of the Utf8Constant at the specified index in the - * reusable constant pool. - */ - private String getString(int constantIndex) - { - return ((Utf8Constant)constantPool[constantIndex]).getString(); - } - - - private Constant createConstant() - { - int u1tag = dataInput.readUnsignedByte(); - - switch (u1tag) - { - case ClassConstants.CONSTANT_Integer: return new IntegerConstant(); - case ClassConstants.CONSTANT_Float: return new FloatConstant(); - case ClassConstants.CONSTANT_Long: return new LongConstant(); - case ClassConstants.CONSTANT_Double: return new DoubleConstant(); - case ClassConstants.CONSTANT_String: return new StringConstant(); - case ClassConstants.CONSTANT_Utf8: return new Utf8Constant(); - case ClassConstants.CONSTANT_InvokeDynamic: return new InvokeDynamicConstant(); - case ClassConstants.CONSTANT_MethodHandle: return new MethodHandleConstant(); - case ClassConstants.CONSTANT_Fieldref: return new FieldrefConstant(); - case ClassConstants.CONSTANT_Methodref: return new MethodrefConstant(); - case ClassConstants.CONSTANT_InterfaceMethodref: return new InterfaceMethodrefConstant(); - case ClassConstants.CONSTANT_Class: return new ClassConstant(); - case ClassConstants.CONSTANT_MethodType: return new MethodTypeConstant(); - case ClassConstants.CONSTANT_NameAndType: return new NameAndTypeConstant(); - - default: throw new RuntimeException("Unknown constant type ["+u1tag+"] in constant pool"); - } - } - - - private void skipAttributes() - { - int u2attributesCount = dataInput.readUnsignedShort(); - - for (int index = 0; index < u2attributesCount; index++) - { - skipAttribute(); - } - } - - - private void skipAttribute() - { - dataInput.skipBytes(2); - int u4attributeLength = dataInput.readInt(); - dataInput.skipBytes(u4attributeLength); - } -} |