org.mvel2.conversion.ShortCH Maven / Gradle / Ivy
/**
* 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 static java.lang.Short.parseShort;
import static java.lang.String.valueOf;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;
import org.mvel2.ConversionException;
import org.mvel2.ConversionHandler;
public class ShortCH implements ConversionHandler {
/**
* This is purely because Eclipse sucks, and has a serious bug with
* it's java parser.
*/
private static final Short TRUE = (short) 1;
private static final Short FALSE = (short) 0;
private static final Map CNV = new HashMap();
private static Converter stringConverter = new Converter() {
public Short convert(Object o) {
return parseShort(((String) o));
}
};
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 Short convert(Object o) {
return ((BigDecimal) o).shortValue();
}
});
CNV.put(BigInteger.class, new Converter() {
public Short convert(Object o) {
return ((BigInteger) o).shortValue();
}
});
CNV.put(Short.class, new Converter() {
public Object convert(Object o) {
return o;
}
});
CNV.put(Integer.class, new Converter() {
public Short convert(Object o) {
if (((Integer) o) > Short.MAX_VALUE) {
throw new ConversionException("cannot coerce Integer to Short since the value (" + valueOf(o)
+ ") exceeds that maximum precision of Integer.");
} else {
return ((Integer) o).shortValue();
}
}
});
CNV.put(Float.class, new Converter() {
public Short convert(Object o) {
if (((Float) o) > Short.MAX_VALUE) {
throw new ConversionException(
"cannot coerce Float to Short since the value (" + valueOf(o) + ") exceeds that maximum precision of Integer.");
} else {
return ((Float) o).shortValue();
}
}
});
CNV.put(Double.class, new Converter() {
public Short convert(Object o) {
if (((Double) o) > Short.MAX_VALUE) {
throw new ConversionException("cannot coerce Double to Short since the value (" + valueOf(o)
+ ") exceeds that maximum precision of Integer.");
} else {
return ((Double) o).shortValue();
}
}
});
CNV.put(Long.class, new Converter() {
public Short convert(Object o) {
if (((Long) o) > Short.MAX_VALUE) {
throw new ConversionException("cannot coerce Integer to Short since the value (" + valueOf(o)
+ ") exceeds that maximum precision of Integer.");
} else {
return ((Long) o).shortValue();
}
}
});
CNV.put(Boolean.class, new Converter() {
public Short convert(Object o) {
if ((Boolean) o) return TRUE;
else {
return FALSE;
}
}
});
}
public Object convertFrom(Object in) {
if (!CNV.containsKey(in.getClass()))
throw new ConversionException("cannot convert type: " + in.getClass().getName() + " to: " + Short.class.getName());
return CNV.get(in.getClass()).convert(in);
}
public boolean canConvertFrom(Class cls) {
return CNV.containsKey(cls);
}
}