/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* 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 net.ontopia.topicmaps.utils.deciders;
import java.util.Collection;
import java.util.Iterator;
import net.ontopia.topicmaps.core.TopicIF;
import net.ontopia.topicmaps.core.TypedIF;
import net.ontopia.utils.DeciderIF;
import net.ontopia.topicmaps.utils.ClassInstanceUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* INTERNAL: Decider that takes either TypedIF or TopicIF and
* returns ok if it is an instance of one of the types it was
* constructed with.
*/
public class InstanceDecider implements DeciderIF<Object> {
// Define a logging category.
protected static Logger log = LoggerFactory
.getLogger(InstanceDecider.class.getName());
protected Collection<TopicIF> types;
/**
* Constructor which takes a Collection of types.
*/
public InstanceDecider(Collection<TopicIF> types) {
this.types = types;
}
/**
* Returns true if the type of a TypedIF object matches and returns
* true if one of the types of a MultiTyped match .
*/
public boolean ok(Object object) {
if (object instanceof TypedIF) {
// TypedIF can only have one type
// Used for Associations, Roles, Occurrences.
TypedIF typed = (TypedIF) object;
if (types!=null && !types.isEmpty()) {
Iterator<TopicIF> it=types.iterator();
while(it.hasNext()){
TopicIF thisTopic = it.next();
if (ClassInstanceUtils.isInstanceOf(typed, thisTopic)) {
return true;
}
}
}
return false;
} else if (object instanceof TopicIF) {
TopicIF topic = (TopicIF) object;
if (!types.isEmpty()) {
Iterator<TopicIF> it = types.iterator();
while(it.hasNext()) {
TopicIF thisTopic = it.next();
if (ClassInstanceUtils.isInstanceOf(topic, thisTopic)) {
return true;
}
}
}
return false;
} else {
log.warn("Object not suitable type: " + object.getClass().getName());
return false;
}
}
}