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Diffstat (limited to 'src/proguard/evaluation/ConstantValueFactory.java')
| -rw-r--r-- | src/proguard/evaluation/ConstantValueFactory.java | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/proguard/evaluation/ConstantValueFactory.java b/src/proguard/evaluation/ConstantValueFactory.java new file mode 100644 index 0000000..0afb20c --- /dev/null +++ b/src/proguard/evaluation/ConstantValueFactory.java @@ -0,0 +1,113 @@ +/* + * ProGuard -- shrinking, optimization, obfuscation, and preverification + * of Java bytecode. + * + * Copyright (c) 2002-2013 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.evaluation; + +import proguard.classfile.*; +import proguard.classfile.constant.*; +import proguard.classfile.constant.visitor.ConstantVisitor; +import proguard.classfile.util.SimplifiedVisitor; +import proguard.evaluation.value.*; + +/** + * This class creates Value instance that correspond to specified constant pool + * entries. + * + * @author Eric Lafortune + */ +public class ConstantValueFactory +extends SimplifiedVisitor +implements ConstantVisitor +{ + protected final ValueFactory valueFactory; + + // Field acting as a parameter for the ConstantVisitor methods. + protected Value value; + + + public ConstantValueFactory(ValueFactory valueFactory) + { + this.valueFactory = valueFactory; + } + + + /** + * Returns the Value of the constant pool element at the given index. + */ + public Value constantValue(Clazz clazz, + int constantIndex) + { + // Visit the constant pool entry to get its return value. + clazz.constantPoolEntryAccept(constantIndex, this); + + return value; + } + + + // Implementations for ConstantVisitor. + + public void visitIntegerConstant(Clazz clazz, IntegerConstant integerConstant) + { + value = valueFactory.createIntegerValue(integerConstant.getValue()); + } + + public void visitLongConstant(Clazz clazz, LongConstant longConstant) + { + value = valueFactory.createLongValue(longConstant.getValue()); + } + + public void visitFloatConstant(Clazz clazz, FloatConstant floatConstant) + { + value = valueFactory.createFloatValue(floatConstant.getValue()); + } + + public void visitDoubleConstant(Clazz clazz, DoubleConstant doubleConstant) + { + value = valueFactory.createDoubleValue(doubleConstant.getValue()); + } + + public void visitStringConstant(Clazz clazz, StringConstant stringConstant) + { + value = valueFactory.createReferenceValue(ClassConstants.INTERNAL_NAME_JAVA_LANG_STRING, + stringConstant.javaLangStringClass, + false); + } + + public void visitMethodHandleConstant(Clazz clazz, MethodHandleConstant methodHandleConstant) + { + value = valueFactory.createReferenceValue(ClassConstants.INTERNAL_NAME_JAVA_LANG_INVOKE_METHOD_HANDLE, + methodHandleConstant.javaLangInvokeMethodHandleClass, + false); + } + + public void visitClassConstant(Clazz clazz, ClassConstant classConstant) + { + value = valueFactory.createReferenceValue(classConstant.getName(clazz), + classConstant.referencedClass, + false); + } + + public void visitMethodTypeConstant(Clazz clazz, MethodTypeConstant methodTypeConstant) + { + value = valueFactory.createReferenceValue(ClassConstants.INTERNAL_NAME_JAVA_LANG_INVOKE_METHOD_TYPE, + methodTypeConstant.javaLangInvokeMethodTypeClass, + false); + } +}
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