/**
* MVEL 2.0
* Copyright (C) 2007 The Codehaus
* Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor
*
* 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.mvel2.conversion;
import org.mvel2.ConversionException;
import org.mvel2.ConversionHandler;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;
import static java.lang.String.valueOf;
public class DoubleCH implements ConversionHandler {
private static final Map<Class, Converter> CNV =
new HashMap<Class, Converter>();
private static Converter stringConverter = new Converter() {
public Object convert(Object o) {
if (((String) o).length() == 0) return (double) 0;
return Double.parseDouble(((String) o));
}
};
public Object convertFrom(Object in) {
if (!CNV.containsKey(in.getClass())) throw new ConversionException("cannot convert type: "
+ in.getClass().getName() + " to: " + Integer.class.getName());
return CNV.get(in.getClass()).convert(in);
}
public boolean canConvertFrom(Class cls) {
return CNV.containsKey(cls);
}
static {
CNV.put(String.class,
stringConverter
);
CNV.put(Object.class,
new Converter() {
public Object convert(Object o) {
return stringConverter.convert(valueOf(o));
}
}
);
CNV.put(BigDecimal.class,
new Converter() {
public Double convert(Object o) {
return ((BigDecimal) o).doubleValue();
}
}
);
CNV.put(BigInteger.class,
new Converter() {
public Double convert(Object o) {
return ((BigInteger) o).doubleValue();
}
}
);
CNV.put(Double.class,
new Converter() {
public Object convert(Object o) {
return o;
}
}
);
CNV.put(Float.class,
new Converter() {
public Double convert(Object o) {
if (((Float) o) > Double.MAX_VALUE) {
throw new ConversionException("cannot coerce Float to Double since the value ("
+ valueOf(o) + ") exceeds that maximum precision of Double.");
}
return ((Float) o).doubleValue();
}
});
CNV.put(Integer.class,
new Converter() {
public Double convert(Object o) {
//noinspection UnnecessaryBoxing
return ((Integer) o).doubleValue();
}
}
);
CNV.put(Short.class,
new Converter() {
public Double convert(Object o) {
//noinspection UnnecessaryBoxing
return ((Short) o).doubleValue();
}
}
);
CNV.put(Long.class,
new Converter() {
public Double convert(Object o) {
//noinspection UnnecessaryBoxing
return ((Long) o).doubleValue();
}
}
);
CNV.put(Boolean.class,
new Converter() {
public Double convert(Object o) {
if ((Boolean) o) return 1d;
else return 0d;
}
}
);
}
}