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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.query.ranking;
import com.yahoo.fs4.GetDocSumsPacket;
import com.yahoo.fs4.MapEncoder;
import com.yahoo.text.JSON;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* Contains the properties of a query.
* This is a multimap: Multiple properties may be set for the same key.
*
* @author bratseth
*/
public class RankProperties implements Cloneable {
private final Map<String, List<Object>> properties;
public RankProperties() {
this(new LinkedHashMap<>());
}
private RankProperties(Map<String, List<Object>> properties) {
this.properties = properties;
}
public void put(String name, String value) {
put(name, (Object)value);
}
/** Adds a property by full name to a value */
public void put(String name, Object value) {
List<Object> list = properties.get(name);
if (list == null) {
list = new ArrayList<>();
properties.put(name, list);
}
list.add(value);
}
/**
* Returns a read-only list of properties properties by full name.
* If this is not set, null is returned. If this is explicitly set to
* have no values, and empty list is returned.
*/
public List<String> get(String name) {
List<Object> values = properties.get(name);
if (values == null) return null;
if (values.isEmpty()) return Collections.<String>emptyList();
// Compatibility ...
List<String> stringValues = new ArrayList<>(values.size());
for (Object value : values)
stringValues.add(value.toString());
return Collections.unmodifiableList(stringValues);
}
/** Removes all properties for a given name */
public void remove(String name) {
properties.remove(name);
}
public boolean isEmpty() {
return properties.isEmpty();
}
/** Returns a modifiable map of the properties of this */
public Map<String, List<Object>> asMap() { return properties; }
/** Encodes this in a binary internal representation and returns the number of property maps encoded (0 or 1) */
public int encode(ByteBuffer buffer, boolean encodeQueryData) {
if (encodeQueryData) {
return MapEncoder.encodeMultiMap("rank", properties, buffer);
}
else {
List<Object> sessionId = properties.get(GetDocSumsPacket.sessionIdKey);
if (sessionId == null) return 0;
return MapEncoder.encodeSingleValue("rank", GetDocSumsPacket.sessionIdKey, sessionId.get(0), buffer);
}
}
@Override
public boolean equals(Object other) {
if (other == this) return true;
if ( ! (other instanceof RankProperties)) return false;
return this.properties.equals(((RankProperties)other).properties);
}
@Override
public int hashCode() {
return properties.hashCode();
}
@Override
public RankProperties clone() {
Map<String, List<Object>> clone = new LinkedHashMap<>();
for (Map.Entry<String, List<Object>> entry : properties.entrySet())
clone.put(entry.getKey(), new ArrayList<>(entry.getValue()));
return new RankProperties(clone);
}
@Override
public String toString() {
return JSON.encode(properties);
}
}
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