/*
*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*
*/
package org.apache.usergrid.persistence.index.query;
import java.io.Serializable;
import org.elasticsearch.search.sort.SortOrder;
/**
* An object that represents a sort predicate
*/
public final class SortPredicate implements Serializable {
private static final long serialVersionUID = 1L;
private final String propertyName;
private final SortDirection direction;
public SortPredicate( String propertyName, SortDirection direction ) {
if ( propertyName == null ) {
throw new NullPointerException( "Property name was null" );
}
if ( direction == null ) {
direction = SortDirection.ASCENDING;
}
this.propertyName = propertyName.trim();
this.direction = direction;
}
public SortPredicate( String propertyName, String direction ) {
this( propertyName, SortDirection.find( direction ) );
}
public String getPropertyName() {
return propertyName;
}
public SortDirection getDirection() {
return direction;
}
@Override
public boolean equals( Object o ) {
if ( this == o ) {
return true;
}
if ( ( o == null ) || ( super.getClass() != o.getClass() ) ) {
return false;
}
SortPredicate that = ( SortPredicate ) o;
if ( direction != that.direction ) {
return false;
}
return ( propertyName.equals( that.propertyName ) );
}
@Override
public int hashCode() {
int result = propertyName.hashCode();
result = ( 31 * result ) + direction.hashCode();
return result;
}
@Override
public String toString() {
return propertyName + ( ( direction == SortDirection.DESCENDING ) ? " DESC" : "" );
}
public enum SortDirection {
ASCENDING(SortOrder.ASC), DESCENDING(SortOrder.DESC);
private final SortOrder esOrder;
SortDirection( final SortOrder esOrder ) {this.esOrder = esOrder;}
/**
* Get the ES sort direction
* @return
*/
public SortOrder toEsSort(){
return esOrder;
}
public static SortDirection find( String s ) {
if ( s == null ) {
return ASCENDING;
}
s = s.toLowerCase();
if ( s.startsWith( "asc" ) ) {
return ASCENDING;
}
if ( s.startsWith( "des" ) ) {
return DESCENDING;
}
if ( s.equals( "+" ) ) {
return ASCENDING;
}
if ( s.equals( "-" ) ) {
return DESCENDING;
}
return ASCENDING;
}
}
}