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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.result;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import com.yahoo.search.Result;
/**
* An iterator for the list of hits in a result. This iterator supports the remove operation.
*
* @author Steinar Knutsen
*/
public class HitIterator implements Iterator<Hit> {
/** The index into the list of hits */
private int index = -1;
/** The list of hits to iterate over */
private List<Hit> hits;
/** The result the hits belong to */
private HitGroup hitGroup;
/** Whether the iterator is in a state where remove is OK */
private boolean canRemove = false;
public HitIterator(HitGroup hitGroup, List<Hit> hits) {
this.hitGroup = hitGroup;
this.hits = hits;
}
public HitIterator(Result result, List<Hit> hits) {
this.hitGroup = result.hits();
this.hits = hits;
}
public boolean hasNext() {
if (hits.size() > (index + 1)) {
return true;
} else {
return false;
}
}
public Hit next() throws NoSuchElementException {
if (hits.size() <= (index + 1)) {
throw new NoSuchElementException();
} else {
canRemove = true;
return hits.get(++index);
}
}
public void remove() throws IllegalStateException {
if (!canRemove) {
throw new IllegalStateException();
}
hitGroup.remove(index);
index--;
canRemove = false;
}
}
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