org.snapscript.dx.Constants Maven / Gradle / Ivy
/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.snapscript.dx;
import org.snapscript.dx.rop.cst.CstBoolean;
import org.snapscript.dx.rop.cst.CstByte;
import org.snapscript.dx.rop.cst.CstChar;
import org.snapscript.dx.rop.cst.CstDouble;
import org.snapscript.dx.rop.cst.CstFloat;
import org.snapscript.dx.rop.cst.CstInteger;
import org.snapscript.dx.rop.cst.CstKnownNull;
import org.snapscript.dx.rop.cst.CstLong;
import org.snapscript.dx.rop.cst.CstShort;
import org.snapscript.dx.rop.cst.CstString;
import org.snapscript.dx.rop.cst.CstType;
import org.snapscript.dx.rop.cst.TypedConstant;
/**
* Factory for rop constants.
*/
final class Constants {
private Constants() {}
/**
* Returns a rop constant for the specified value.
*
* @param value null, a boxed primitive, String, Class, or TypeId.
*/
static TypedConstant getConstant(Object value) {
if (value == null) {
return CstKnownNull.THE_ONE;
} else if (value instanceof Boolean) {
return CstBoolean.make((Boolean) value);
} else if (value instanceof Byte) {
return CstByte.make((Byte) value);
} else if (value instanceof Character) {
return CstChar.make((Character) value);
} else if (value instanceof Double) {
return CstDouble.make(Double.doubleToLongBits((Double) value));
} else if (value instanceof Float) {
return CstFloat.make(Float.floatToIntBits((Float) value));
} else if (value instanceof Integer) {
return CstInteger.make((Integer) value);
} else if (value instanceof Long) {
return CstLong.make((Long) value);
} else if (value instanceof Short) {
return CstShort.make((Short) value);
} else if (value instanceof String) {
return new CstString((String) value);
} else if (value instanceof Class) {
return new CstType(TypeId.get((Class) value).ropType);
} else if (value instanceof TypeId) {
return new CstType(((TypeId) value).ropType);
} else {
throw new UnsupportedOperationException("Not a constant: " + value);
}
}
}