org.mvel2.conversion.BooleanCH 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.String.valueOf;
import java.math.BigDecimal;
import java.util.HashMap;
import java.util.Map;
import org.mvel2.ConversionException;
import org.mvel2.ConversionHandler;
public class BooleanCH implements ConversionHandler {
private static final Map CNV = new HashMap();
private static Converter stringConverter = new Converter() {
public Object convert(Object o) {
return !(((String) o).equalsIgnoreCase("false") || (((String) o).equalsIgnoreCase("no"))
|| (((String) o).equalsIgnoreCase("off")) || ("0".equals(o)) || ("".equals(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(Boolean.class, new Converter() {
public Object convert(Object o) {
return o;
}
});
CNV.put(Integer.class, new Converter() {
public Boolean convert(Object o) {
return (((Integer) o) > 0);
}
});
CNV.put(Float.class, new Converter() {
public Boolean convert(Object o) {
return (((Float) o) > 0);
}
});
CNV.put(Double.class, new Converter() {
public Boolean convert(Object o) {
return (((Double) o) > 0);
}
});
CNV.put(Short.class, new Converter() {
public Boolean convert(Object o) {
return (((Short) o) > 0);
}
});
CNV.put(Long.class, new Converter() {
public Boolean convert(Object o) {
return (((Long) o) > 0);
}
});
CNV.put(boolean.class, new Converter() {
public Boolean convert(Object o) {
return Boolean.valueOf((Boolean) o);
}
});
CNV.put(BigDecimal.class, new Converter() {
public Boolean convert(Object o) {
return Boolean.valueOf(((BigDecimal) o).doubleValue() > 0);
}
});
}
public Object convertFrom(Object in) {
if (!CNV.containsKey(in.getClass()))
throw new ConversionException("cannot convert type: " + in.getClass().getName() + " to: " + Boolean.class.getName());
return CNV.get(in.getClass()).convert(in);
}
public boolean canConvertFrom(Class cls) {
return CNV.containsKey(cls);
}
}