| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2009 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.attribute.preverification; |
| |
| import proguard.classfile.*; |
| import proguard.classfile.attribute.CodeAttribute; |
| import proguard.classfile.attribute.preverification.visitor.VerificationTypeVisitor; |
| |
| /** |
| * This abstract class represents a verification type of a local variable or |
| * a stack element. Specific verification types are subclassed from it. |
| * |
| * @author Eric Lafortune |
| */ |
| public abstract class VerificationType implements VisitorAccepter |
| { |
| public static final int TOP_TYPE = 0; |
| public static final int INTEGER_TYPE = 1; |
| public static final int FLOAT_TYPE = 2; |
| public static final int DOUBLE_TYPE = 3; |
| public static final int LONG_TYPE = 4; |
| public static final int NULL_TYPE = 5; |
| public static final int UNINITIALIZED_THIS_TYPE = 6; |
| public static final int OBJECT_TYPE = 7; |
| public static final int UNINITIALIZED_TYPE = 8; |
| |
| |
| /** |
| * An extra field in which visitors can store information. |
| */ |
| public Object visitorInfo; |
| |
| |
| /** |
| * Returns the tag of the verification type. |
| */ |
| public abstract int getTag(); |
| |
| |
| /** |
| * Accepts the given visitor in the context of a method's code, either on |
| * a stack or as a variable. |
| */ |
| public abstract void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, VerificationTypeVisitor verificationTypeVisitor); |
| |
| |
| /** |
| * Accepts the given visitor in the context of a stack in a method's code . |
| */ |
| public abstract void stackAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int stackIndex, VerificationTypeVisitor verificationTypeVisitor); |
| |
| |
| /** |
| * Accepts the given visitor in the context of a variable in a method's code. |
| */ |
| public abstract void variablesAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int variableIndex, VerificationTypeVisitor verificationTypeVisitor); |
| |
| |
| // Implementations for VisitorAccepter. |
| |
| public Object getVisitorInfo() |
| { |
| return visitorInfo; |
| } |
| |
| public void setVisitorInfo(Object visitorInfo) |
| { |
| this.visitorInfo = visitorInfo; |
| } |
| |
| |
| // Implementations for Object. |
| |
| public boolean equals(Object object) |
| { |
| return object != null && |
| this.getClass() == object.getClass(); |
| } |
| |
| |
| public int hashCode() |
| { |
| return this.getClass().hashCode(); |
| } |
| } |