/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.sql.lang;
import java.util.Collection;
import java.util.Iterator;
import org.teiid.designer.query.sql.lang.ICollectionValueIterator;
import org.teiid.query.sql.util.ValueIterator;
/**
*
*/
public class CollectionValueIterator implements ValueIterator, ICollectionValueIterator {
private Collection vals;
private Iterator instance = null;
/**
* @param vals
*/
public CollectionValueIterator(Collection vals) {
this.vals = vals;
}
/**
* @see org.teiid.query.sql.util.ValueIterator#hasNext()
* @since 4.3
*/
@Override
public boolean hasNext() throws Exception {
if (instance == null) {
this.instance = vals.iterator();
}
return this.instance.hasNext();
}
/**
* @see org.teiid.query.sql.util.ValueIterator#next()
* @since 4.3
*/
@Override
public Object next() throws Exception {
if (instance == null) {
this.instance = vals.iterator();
}
return this.instance.next();
}
/**
* @see org.teiid.query.sql.util.ValueIterator#reset()
* @since 4.3
*/
@Override
public void reset() {
this.instance = null;
}
}