/*
* Carrot2 project.
*
* Copyright (C) 2002-2014, Dawid Weiss, Stanisław Osiński.
* All rights reserved.
*
* Refer to the full license file "carrot2.LICENSE"
* in the root folder of the repository checkout or at:
* http://www.carrot2.org/carrot2.LICENSE
*/
package org.carrot2.workbench.editors.impl;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Map;
import javax.xml.crypto.NoSuchMechanismException;
import org.carrot2.workbench.editors.AttributeEditorInfo;
/**
* An attribute editor for objects whose classes declare a conversion-from-string
* (<tt>valueOf(String)</tt>) method.
*/
public class ClassWithValueOfEditor extends StringEditor
{
private Method valueOf;
@Override
protected AttributeEditorInfo init(Map<String, Object> defaultValues)
{
Class<?> clazz = super.descriptor.type;
if (clazz == null)
throw new IllegalArgumentException("Attribute's class must exist: "
+ super.getAttributeKey());
try
{
Method valueOf = clazz.getDeclaredMethod("valueOf", String.class);
if (!Modifier.isStatic(valueOf.getModifiers()))
throw new NoSuchMethodException();
if (!Modifier.isPublic(valueOf.getModifiers()))
throw new NoSuchMechanismException();
this.valueOf = valueOf;
}
catch (NoSuchMethodException e)
{
throw new IllegalArgumentException("Attribute's class must have a public static valueOf method: "
+ super.getAttributeKey() + ", class: " + clazz.getName());
}
return super.init(defaultValues);
}
@Override
protected boolean isValid(String newValue)
{
try {
valueOf.invoke(null, newValue);
} catch (Exception e) {
return false;
}
return true;
}
}