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Diffstat (limited to 'src/proguard/shrink/LocalVariableTypeUsageMarker.java')
| -rw-r--r-- | src/proguard/shrink/LocalVariableTypeUsageMarker.java | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/src/proguard/shrink/LocalVariableTypeUsageMarker.java b/src/proguard/shrink/LocalVariableTypeUsageMarker.java deleted file mode 100644 index 3d6ef27..0000000 --- a/src/proguard/shrink/LocalVariableTypeUsageMarker.java +++ /dev/null @@ -1,177 +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.shrink; - -import proguard.classfile.*; -import proguard.classfile.attribute.*; -import proguard.classfile.attribute.visitor.*; -import proguard.classfile.constant.Constant; -import proguard.classfile.constant.visitor.ConstantVisitor; -import proguard.classfile.util.SimplifiedVisitor; -import proguard.classfile.visitor.ClassVisitor; - -/** - * This AttributeVisitor recursively marks all information that points to used - * classes, in the LocalVariableTable and LocalVariableTypeTable attributes that - * it visits. - * - * @see UsageMarker - * - * @author Eric Lafortune - */ -public class LocalVariableTypeUsageMarker -extends SimplifiedVisitor -implements AttributeVisitor, - LocalVariableInfoVisitor, - LocalVariableTypeInfoVisitor, - ClassVisitor, - ConstantVisitor -{ - private final UsageMarker usageMarker; - - // Fields acting as return values for several visitor methods. - private boolean tableUsed; - private boolean variableInfoUsed; - - - /** - * Creates a new LocalVariableTypeUsageMarker. - * @param usageMarker the usage marker that is used to mark the classes - * and class members. - */ - public LocalVariableTypeUsageMarker(UsageMarker usageMarker) - { - this.usageMarker = usageMarker; - } - - - // Implementations for AttributeVisitor. - - public void visitAnyAttribute(Clazz clazz, Attribute attribute) {} - - - public void visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute) - { - // Check and mark the individual entries. - tableUsed = false; - localVariableTableAttribute.localVariablesAccept(clazz, method, codeAttribute, this); - - // Mark the table if any of the entries is marked. - if (tableUsed) - { - usageMarker.markAsUsed(localVariableTableAttribute); - - markConstant(clazz, localVariableTableAttribute.u2attributeNameIndex); - } - } - - - public void visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute) - { - // Check and mark the individual entries. - tableUsed = false; - localVariableTypeTableAttribute.localVariablesAccept(clazz, method, codeAttribute, this); - - // Mark the table if any of the entries is marked. - if (tableUsed) - { - usageMarker.markAsUsed(localVariableTypeTableAttribute); - - markConstant(clazz, localVariableTypeTableAttribute.u2attributeNameIndex); - } - } - - - // Implementations for LocalVariableInfoVisitor. - - public void visitLocalVariableInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableInfo localVariableInfo) - { - // Only keep the local variable info if all of its classes are used. - variableInfoUsed = true; - localVariableInfo.referencedClassAccept(this); - - if (variableInfoUsed) - { - // We got a positive used flag, so the local variable info is useful. - usageMarker.markAsUsed(localVariableInfo); - - markConstant(clazz, localVariableInfo.u2nameIndex); - markConstant(clazz, localVariableInfo.u2descriptorIndex); - - tableUsed = true; - } - } - - - // Implementations for LocalVariableTypeInfoVisitor. - - public void visitLocalVariableTypeInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeInfo localVariableTypeInfo) - { - // Only keep the local variable info if all of its classes are used. - variableInfoUsed = true; - localVariableTypeInfo.referencedClassesAccept(this); - - if (variableInfoUsed) - { - // We got a positive used flag, so the local variable info is useful. - usageMarker.markAsUsed(localVariableTypeInfo); - - markConstant(clazz, localVariableTypeInfo.u2nameIndex); - markConstant(clazz, localVariableTypeInfo.u2signatureIndex); - - tableUsed = true; - } - } - - - // Implementations for ClassVisitor. - - public void visitLibraryClass(LibraryClass libraryClass) {} - - - public void visitProgramClass(ProgramClass programClass) - { - // Don't keep the local variable info if one of its classes is not used. - if (!usageMarker.isUsed(programClass)) - { - variableInfoUsed = false; - } - } - - - // Implementations for ConstantVisitor. - - public void visitAnyConstant(Clazz clazz, Constant constant) - { - usageMarker.markAsUsed(constant); - } - - - // Small utility methods. - - /** - * Marks the given constant pool entry of the given class. - */ - private void markConstant(Clazz clazz, int index) - { - clazz.constantPoolEntryAccept(index, this); - } -} |