diff options
Diffstat (limited to 'src/proguard/evaluation/value/InitialValueFactory.java')
-rw-r--r-- | src/proguard/evaluation/value/InitialValueFactory.java | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/proguard/evaluation/value/InitialValueFactory.java b/src/proguard/evaluation/value/InitialValueFactory.java new file mode 100644 index 0000000..4b2cf29 --- /dev/null +++ b/src/proguard/evaluation/value/InitialValueFactory.java @@ -0,0 +1,79 @@ +/* + * 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.evaluation.value; + +import proguard.classfile.ClassConstants; + +/** + * This value factory creates initial values for fields and array elements, + * with the help of a given value factory. Note that this class itself doesn't + * implement ValueFactory. + * + * @author Eric Lafortune + */ +public class InitialValueFactory +{ + private final ValueFactory valueFactory; + + + /** + * Creates a new InitialValueFactory. + * @param valueFactory the value factory that will actually create the + * values. + */ + public InitialValueFactory(ValueFactory valueFactory) + { + this.valueFactory = valueFactory; + } + + + /** + * Creates an initial value (0, 0L, 0.0f, 0.0, null) of the given type. + */ + public Value createValue(String type) + { + switch (type.charAt(0)) + { + case ClassConstants.TYPE_BOOLEAN: + case ClassConstants.TYPE_BYTE: + case ClassConstants.TYPE_CHAR: + case ClassConstants.TYPE_SHORT: + case ClassConstants.TYPE_INT: + return valueFactory.createIntegerValue(0); + + case ClassConstants.TYPE_LONG: + return valueFactory.createLongValue(0L); + + case ClassConstants.TYPE_FLOAT: + return valueFactory.createFloatValue(0.0f); + + case ClassConstants.TYPE_DOUBLE: + return valueFactory.createDoubleValue(0.0); + + case ClassConstants.TYPE_CLASS_START: + case ClassConstants.TYPE_ARRAY: + return valueFactory.createReferenceValueNull(); + + default: + throw new IllegalArgumentException("Invalid type ["+type+"]"); + } + } +} |