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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 java.nio.ByteBuffer;
import java.util.Objects;
import java.util.regex.Pattern;
/**
* Match a field with the contained regular expression.
*
* @author Steinar Knutsen
*/
public class RegExpItem extends TermItem {
private String expression;
private Pattern regexp;
public RegExpItem(String indexName, boolean isFromQuery, String expression) {
super(indexName, isFromQuery, null);
setValue(expression);
}
@Override
public String stringValue() {
return expression;
}
@Override
public boolean isStemmed() {
return true;
}
@Override
public int getNumWords() {
return 1;
}
@Override
public void setValue(String expression) {
regexp = Pattern.compile(expression);
this.expression = expression;
}
@Override
public String getRawWord() {
return stringValue();
}
@Override
public boolean isWords() {
return false;
}
@Override
public String getIndexedString() {
return stringValue();
}
@Override
public ItemType getItemType() {
return ItemType.REGEXP;
}
@Override
public String getName() {
return ItemType.REGEXP.name();
}
protected void encodeThis(ByteBuffer buffer) {
super.encodeThis(buffer);
putString(getIndexedString(), buffer);
}
public Pattern getRegexp() { return regexp; }
@Override
public String toString() {
return "RegExpItem [expression=" + expression + "]";
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), expression);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if ( ! super.equals(o)) return false;
if (getClass() != o.getClass()) return false;
RegExpItem other = (RegExpItem)o;
return Objects.equals(this.expression, other.expression);
}
}
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