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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.query;
import com.yahoo.compress.IntegerCompressor;
import java.nio.ByteBuffer;
import java.util.Objects;
/**
* Fuzzy search term
*
* @author alexeyche
*/
public class FuzzyItem extends TermItem {
private String term;
private int maxEditDistance;
private int prefixLength;
public static int DEFAULT_MAX_EDIT_DISTANCE = 2;
public static int DEFAULT_PREFIX_LENGTH = 0;
public FuzzyItem(String indexName, boolean isFromQuery, String term, int maxEditDistance, int prefixLength) {
super(indexName, isFromQuery, null);
setValue(term);
setMaxEditDistance(maxEditDistance);
setPrefixLength(prefixLength);
}
public void setMaxEditDistance(int maxEditDistance) {
this.maxEditDistance = maxEditDistance;
}
public void setPrefixLength(int prefixLength) {
this.prefixLength = prefixLength;
}
public int getPrefixLength() {
return this.prefixLength;
}
public int getMaxEditDistance() {
return this.maxEditDistance;
}
@Override
public void setValue(String value) {
this.term = value;
}
@Override
public String getRawWord() {
return stringValue();
}
@Override
public boolean isWords() {
return false;
}
@Override
public ItemType getItemType() {
return ItemType.FUZZY;
}
@Override
public String getName() {
return "FUZZY";
}
@Override
public String stringValue() {
return term;
}
@Override
public boolean isStemmed() {
return false;
}
@Override
public String getIndexedString() {
return stringValue();
}
@Override
public int getNumWords() {
return 1;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!super.equals(obj)) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
FuzzyItem other = (FuzzyItem) obj;
if (!this.term.equals(other.term)) return false;
if (this.maxEditDistance != other.maxEditDistance) return false;
if (this.prefixLength != other.prefixLength) return false;
return true;
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), term, maxEditDistance, prefixLength);
}
@Override
protected void appendHeadingString(StringBuilder buffer) {
buffer.append(getName());
buffer.append("(");
buffer.append(this.term);
buffer.append(",");
buffer.append(this.maxEditDistance);
buffer.append(",");
buffer.append(this.prefixLength);
buffer.append(")");
buffer.append(" ");
}
@Override
protected void encodeThis(ByteBuffer buffer) {
super.encodeThis(buffer);
putString(getIndexedString(), buffer);
IntegerCompressor.putCompressedPositiveNumber(this.maxEditDistance, buffer);
IntegerCompressor.putCompressedPositiveNumber(this.prefixLength, buffer);
}
}
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