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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.semantics.engine;
import com.yahoo.prelude.query.CompositeItem;
import com.yahoo.prelude.query.Item;
import com.yahoo.prelude.query.TermItem;
import com.yahoo.prelude.query.WordItem;
/**
* A match
*
* @author bratseth
*/
public class Match {
/** The start position of this match */
private int position;
private TermItem item;
/** The string to replace the match by, usually item.getIndexedString() */
private String replaceValue;
/** The parent of the matched item */
private CompositeItem parent=null;
/**
* Creates a match
*
* @param item the match to add
* @param replaceValue the string to replace this match by, usually the item.getIndexedString()
* which is what the replace value will be if it is passed as null here
*/
public Match(FlattenedItem item,String replaceValue) {
this.item=item.getItem();
if (replaceValue==null)
this.replaceValue=item.getItem().getIndexedString();
else
this.replaceValue=replaceValue;
this.parent=this.item.getParent();
this.position=item.getPosition();
}
public int getPosition() { return position; }
public TermItem getItem() { return item; }
public String getReplaceValue() {
return replaceValue;
}
/**
* Returns the parent in which the item was matched, or null if the item was root.
* Note that the item may subsequently have been removed, so it does not necessarily
* have this parent
*/
public CompositeItem getParent() { return parent; }
public int hashCode() {
return
17*item.getIndexedString().hashCode()+
33*item.getIndexName().hashCode();
}
/** Returns a new item representing this match */
public Item toItem(String label) {
return new WordItem(getReplaceValue(),label);
}
public boolean equals(Object o) {
if (! (o instanceof Match)) return false;
Match other=(Match)o;
if (other.position!=position) return false;
if (!other.item.equals(item)) return false;
return true;
}
}
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