/*
* Copyright (c) 2007, 2010, James Leigh All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the openrdf.org nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
package net.enilink.komma.literals.internal;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import net.enilink.composition.properties.exceptions.ObjectConversionException;
import com.google.inject.Inject;
import net.enilink.komma.literals.IConverter;
import net.enilink.komma.core.ILiteral;
import net.enilink.komma.core.ILiteralFactory;
import net.enilink.komma.core.URI;
import net.enilink.komma.core.URIs;
/**
* Converts objects with a valueOf method to and from {@link ILiteral}.
*
*/
public class ValueOfConverter<T> implements IConverter<T> {
@Inject
private ILiteralFactory lf;
private Method valueOfMethod;
private URI datatype;
public ValueOfConverter(Class<T> type) throws NoSuchMethodException {
this.datatype = URIs.createURI("java:" + type.getName());
try {
this.valueOfMethod = type.getDeclaredMethod("valueOf",
new Class[] { String.class });
if (!Modifier.isStatic(valueOfMethod.getModifiers()))
throw new NoSuchMethodException("valueOf Method is not static");
if (!type.equals(valueOfMethod.getReturnType()))
throw new NoSuchMethodException("Invalid return type");
} catch (NoSuchMethodException e) {
try {
this.valueOfMethod = type.getDeclaredMethod("getInstance",
new Class[] { String.class });
if (!Modifier.isStatic(valueOfMethod.getModifiers()))
throw new NoSuchMethodException(
"getInstance Method is not static");
if (!type.equals(valueOfMethod.getReturnType()))
throw new NoSuchMethodException("Invalid return type");
} catch (NoSuchMethodException e2) {
throw e;
}
}
}
public String getJavaClassName() {
return valueOfMethod.getDeclaringClass().getName();
}
public URI getDatatype() {
return datatype;
}
public void setDatatype(URI datatype) {
this.datatype = datatype;
}
@SuppressWarnings("unchecked")
public T deserialize(String label) {
try {
return (T) valueOfMethod.invoke(null, new Object[] { label });
} catch (Exception e) {
throw new ObjectConversionException(e);
}
}
public ILiteral serialize(T object) {
return lf.createLiteral(object.toString(), datatype, null);
}
}