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package de.lmu.ifi.dbs.elki.data.type;
import de.lmu.ifi.dbs.elki.persistent.ByteBufferSerializer;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2012
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Class wrapping a particular data type.
*
* @author Erich Schubert
*
* @param <T> Java type we represent.
*/
public class SimpleTypeInformation<T> implements TypeInformation {
/**
* The restriction class we represent.
*/
private Class<? super T> cls;
/**
* Type label
*/
private String label = null;
/**
* Type serializer
*/
private ByteBufferSerializer<? super T> serializer = null;
/**
* Constructor.
*
* @param cls restriction class
*/
public SimpleTypeInformation(Class<? super T> cls) {
super();
this.cls = cls;
}
/**
* Constructor.
*
* @param cls restriction class
* @param label type label
*/
public SimpleTypeInformation(Class<? super T> cls, String label) {
super();
this.cls = cls;
this.label = label;
}
/**
* Constructor.
*
* @param cls restriction class
* @param serializer Serializer
*/
public SimpleTypeInformation(Class<? super T> cls, ByteBufferSerializer<? super T> serializer) {
super();
this.cls = cls;
this.serializer = serializer;
}
/**
* Constructor.
*
* @param cls restriction class
* @param label type label
* @param serializer Serializer
*/
public SimpleTypeInformation(Class<? super T> cls, String label, ByteBufferSerializer<? super T> serializer) {
super();
this.cls = cls;
this.label = label;
this.serializer = serializer;
}
/**
* Get the raw restriction class.
*
* @return Restriction class
*/
public final Class<? super T> getRestrictionClass() {
return cls;
}
@Override
public boolean isAssignableFromType(TypeInformation type) {
if(!(type instanceof SimpleTypeInformation)) {
return false;
}
final SimpleTypeInformation<?> simpleType = (SimpleTypeInformation<?>) type;
return cls.isAssignableFrom(simpleType.getRestrictionClass());
}
@Override
public boolean isAssignableFrom(Object other) {
return cls.isInstance(other);
}
/**
* Cast the object to type T (actually to the given restriction class!)
*
* @param other Object to cast.
* @return Instance
*/
@SuppressWarnings("unchecked")
public T cast(Object other) {
return (T) cls.cast(other);
}
@Override
public String toString() {
return getRestrictionClass().getSimpleName();
}
/**
* Get the type label
*
* @return Label
*/
public String getLabel() {
return label;
}
/**
* Get the serializer for this type.
*
* @return Type serializer
*/
public ByteBufferSerializer<? super T> getSerializer() {
return serializer;
}
}
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