/* * ProGuard -- shrinking, optimization, obfuscation, and preverification * of Java bytecode. * * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu) * * This library 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 library 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 Lesser General Public License * for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package proguard.classfile.constant; import proguard.classfile.*; import proguard.classfile.constant.visitor.ConstantVisitor; import proguard.classfile.visitor.*; /** * This Constant represents a string constant in the constant pool. * * @author Eric Lafortune */ public class StringConstant extends Constant { public int u2stringIndex; /** * An extra field pointing to the referenced Clazz object, if this * string is being used in Class.forName(), .class, or * Class.getDeclaredField/Method constructs. * This field is typically filled out by the {@link * proguard.classfile.util.DynamicClassReferenceInitializer * DynamicClassReferenceInitializer} or by the {@link * proguard.classfile.util.DynamicMemberReferenceInitializer * DynamicMemberReferenceInitializer}. */ public Clazz referencedClass; /** * An extra field pointing to the referenced Member object, if this * string is being used in Class.getDeclaredField/Method constructs. * This field is typically filled out by the {@link * proguard.classfile.util.DynamicMemberReferenceInitializer * DynamicMemberReferenceInitializer}. */ public Member referencedMember; /** * Creates an uninitialized StringConstant. */ public StringConstant() { } /** * Creates a new StringConstant with the given string index. * @param u2stringIndex the index of the string in the constant pool. * @param referencedClass the referenced class, if any. * @param referenceMember the referenced class member, if any. */ public StringConstant(int u2stringIndex, Clazz referencedClass, Member referenceMember) { this.u2stringIndex = u2stringIndex; this.referencedClass = referencedClass; this.referencedMember = referenceMember; } /** * Returns the string value. */ public String getString(Clazz clazz) { return clazz.getString(u2stringIndex); } // Implementations for Constant. public int getTag() { return ClassConstants.CONSTANT_String; } public void accept(Clazz clazz, ConstantVisitor constantVisitor) { constantVisitor.visitStringConstant(clazz, this); } /** * Lets the referenced class accept the given visitor. */ public void referencedClassAccept(ClassVisitor classVisitor) { if (referencedClass != null && referencedMember == null) { referencedClass.accept(classVisitor); } } /** * Lets the referenced member accept the given visitor. */ public void referencedMemberAccept(MemberVisitor memberVisitor) { if (referencedMember != null) { referencedMember.accept(referencedClass, memberVisitor); } } }
