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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.query;
import com.yahoo.net.UrlTokenizer;
import com.yahoo.prelude.query.textualrepresentation.Discloser;
/**
* Special words known by the index used for marking things.
* The reserved word itself is not public, while a symbol representation is.
*
* @author bratseth
*/
public class MarkerWordItem extends WordItem {
/** Creates a special word item which marks the start of a host name */
public static WordItem createStartOfHost() {
return new MarkerWordItem("^", UrlTokenizer.TERM_STARTHOST);
}
/** Creates a special word item which marks the end of a host name */
public static WordItem createEndOfHost() {
return new MarkerWordItem("$", UrlTokenizer.TERM_ENDHOST);
}
private String markerWord;
private MarkerWordItem(String publicSymbol, String markerWord) {
super(publicSymbol);
this.markerWord = markerWord;
}
/** Returns the marker word for encoding */
protected String getEncodedWord() {
return markerWord;
}
public boolean equals(Object o) {
if (!super.equals(o)) {
return false;
}
if (!(o instanceof MarkerWordItem)) {
return false;
}
MarkerWordItem other = (MarkerWordItem) o;
return markerWord.equals(other.markerWord);
}
public int hashCode() {
return super.hashCode() + 499 * markerWord.hashCode();
}
@Override
public void disclose(Discloser discloser) {
super.disclose(discloser);
discloser.addProperty("markerWord", markerWord);
}
}
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