| /* |
| * 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.optimize.evaluation; |
| |
| import proguard.classfile.*; |
| import proguard.classfile.constant.RefConstant; |
| import proguard.evaluation.BasicInvocationUnit; |
| import proguard.evaluation.value.*; |
| |
| /** |
| * This InvocationUnit loads parameter values and return values that were |
| * previously stored with the methods that are invoked. |
| * |
| * @see StoringInvocationUnit |
| * @author Eric Lafortune |
| */ |
| public class LoadingInvocationUnit |
| extends BasicInvocationUnit |
| { |
| private final boolean loadFieldValues; |
| private final boolean loadMethodParameterValues; |
| private final boolean loadMethodReturnValues; |
| |
| |
| /** |
| * Creates a new LoadingInvocationUnit with the given value factory. |
| */ |
| public LoadingInvocationUnit(ValueFactory valueFactory) |
| { |
| this(valueFactory, true, true, true); |
| } |
| |
| |
| /** |
| * Creates a new LoadingInvocationUnit with the given value factory, for |
| * loading the specified values. |
| */ |
| public LoadingInvocationUnit(ValueFactory valueFactory, |
| boolean loadFieldValues, |
| boolean loadMethodParameterValues, |
| boolean loadMethodReturnValues) |
| { |
| super(valueFactory); |
| |
| this.loadFieldValues = loadFieldValues; |
| this.loadMethodParameterValues = loadMethodParameterValues; |
| this.loadMethodReturnValues = loadMethodReturnValues; |
| } |
| |
| |
| // Implementations for BasicInvocationUnit. |
| |
| protected Value getFieldClassValue(Clazz clazz, |
| RefConstant refConstant, |
| String type) |
| { |
| if (loadFieldValues) |
| { |
| // Do we know this field? |
| Member referencedMember = refConstant.referencedMember; |
| if (referencedMember != null) |
| { |
| // Retrieve the stored field class value. |
| ReferenceValue value = StoringInvocationUnit.getFieldClassValue((Field)referencedMember); |
| if (value != null) |
| { |
| return value; |
| } |
| } |
| } |
| |
| return super.getFieldClassValue(clazz, refConstant, type); |
| } |
| |
| |
| protected Value getFieldValue(Clazz clazz, |
| RefConstant refConstant, |
| String type) |
| { |
| if (loadFieldValues) |
| { |
| // Do we know this field? |
| Member referencedMember = refConstant.referencedMember; |
| if (referencedMember != null) |
| { |
| // Retrieve the stored field value. |
| Value value = StoringInvocationUnit.getFieldValue((Field)referencedMember); |
| if (value != null) |
| { |
| return value; |
| } |
| } |
| } |
| |
| return super.getFieldValue(clazz, refConstant, type); |
| } |
| |
| |
| protected Value getMethodParameterValue(Clazz clazz, |
| Method method, |
| int parameterIndex, |
| String type, |
| Clazz referencedClass) |
| { |
| if (loadMethodParameterValues) |
| { |
| // Retrieve the stored method parameter value. |
| Value value = StoringInvocationUnit.getMethodParameterValue(method, parameterIndex); |
| if (value != null) |
| { |
| return value; |
| } |
| } |
| |
| return super.getMethodParameterValue(clazz, |
| method, |
| parameterIndex, |
| type, |
| referencedClass); |
| } |
| |
| |
| protected Value getMethodReturnValue(Clazz clazz, |
| RefConstant refConstant, |
| String type) |
| { |
| if (loadMethodReturnValues) |
| { |
| // Do we know this method? |
| Member referencedMember = refConstant.referencedMember; |
| if (referencedMember != null) |
| { |
| // Retrieve the stored method return value. |
| Value value = StoringInvocationUnit.getMethodReturnValue((Method)referencedMember); |
| if (value != null) |
| { |
| return value; |
| } |
| } |
| } |
| |
| return super.getMethodReturnValue(clazz, |
| refConstant, |
| type); |
| } |
| } |