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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.Collection;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
/*
* Class representing an IN operator with a set of string values.
*
* @author toregge
*/
public class StringInItem extends InItem {
private Set<String> tokens;
public StringInItem(String indexName) {
super(indexName);
tokens = new HashSet<>(1000);
}
@Override
public ItemType getItemType() {
return ItemType.STRING_IN;
}
@Override
public int encode(ByteBuffer buffer) {
encodeThis(buffer);
return 1;
}
@Override
protected void encodeThis(ByteBuffer buffer) {
super.encodeThis(buffer);
IntegerCompressor.putCompressedPositiveNumber(tokens.size(), buffer);
putString(getIndexName(), buffer);
for (var entry : tokens) {
putString(entry, buffer);
}
}
@Override
public int getTermCount() {
return 1;
}
@Override
protected void appendBodyString(StringBuilder buffer) {
buffer.append(getIndexName());
buffer.append("{");
for (var entry : tokens) {
buffer.append("\"");
buffer.append(entry);
buffer.append("\",");
}
if (!tokens.isEmpty()) {
buffer.deleteCharAt(buffer.length() - 1); // remove extra ","
}
buffer.append("}");
}
public void addToken(String token) {
Objects.requireNonNull(token, "Token string must not be null");
tokens.add(token);
}
public Collection<String> getTokens() { return Set.copyOf(tokens); }
@Override
public boolean equals(Object o) {
if (o == this) return true;
if ( ! super.equals(o)) return false;
var other = (StringInItem)o;
if ( ! Objects.equals(this.tokens, other.tokens)) return false;
return true;
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), tokens);
}
}
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