/**
* Copyright 2004-2016 Riccardo Solmi. All rights reserved.
* This file is part of the Whole Platform.
*
* The Whole Platform is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Whole Platform 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
*/
package org.whole.lang.comparators;
import java.util.ArrayList;
import java.util.List;
import org.whole.lang.bindings.IBindingManager;
import org.whole.lang.iterators.IEntityIterator;
import org.whole.lang.model.IEntity;
import org.whole.lang.operations.ICloneContext;
/**
* @author Riccardo Solmi
*/
public class IdentityIteratorComparator<T extends IEntity> extends AbstractEqualityComparator<T> {
protected IEntityIterator<? extends T> iterator;
protected IEntityComparator<? super T> comparator;
public IdentityIteratorComparator(IEntityIterator<T> iterator) {
this(iterator, BusinessIdentityComparator.instance);
}
public IdentityIteratorComparator(IEntityIterator<? extends T> iterator, IEntityComparator<? super T> collector) {
this.iterator = iterator;
this.comparator = collector;
}
@Override
public IEntityComparator<T> clone(ICloneContext cc) {
IdentityIteratorComparator<T> comparator = (IdentityIteratorComparator<T>) super.clone(cc);
comparator.iterator = cc.clone(this.iterator);
comparator.comparator = cc.clone(this.comparator);
return comparator;
}
public void setBindings(IBindingManager bm) {
iterator.setBindings(bm);
comparator.setBindings(bm);
}
public boolean equals(T e1, T e2) {
return hasIdentity(e2, identityOf(e1));
}
protected List<T> identityOf(T e) {
List<T> identityList = new ArrayList<T>();
iterator.reset(e);
while (iterator.hasNext())
identityList.add(iterator.next());
return identityList;
}
protected <R extends IEntity> boolean hasIdentity(IEntity e, List<? extends T> identity) {
iterator.reset(e);
for (int i=0, size=identity.size(); i<size; i++)
if (!iterator.hasNext() || !comparator.equals(identity.get(i), iterator.next()))
return false;
return !iterator.hasNext();
}
public boolean contains(IEntity container, T e) {
List<T> eIdentity = identityOf(e);
for (int i=0, size=container.wSize(); i<size; i++)
if (hasIdentity(container.wGet(i), eIdentity))
return true;
return false;
}
public IEntity get(IEntity container, T e) {
List<T> eIdentity = identityOf(e);
for (int i=0, size=container.wSize(); i<size; i++) {
IEntity e0 = container.wGet(i);
if (hasIdentity(e0, eIdentity))
return e0;
}
return null;
}
}