FieldScoreQuery.cs

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/* 
 * 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.
 */

using System;

namespace Lucene.Net.Search.Function
{
    
    [Serializable]
    public class FieldScoreQuery:ValueSourceQuery
    {
        
        public class Type
        {
            
            public static readonly Type BYTE = new Type("byte");
            
            public static readonly Type SHORT = new Type("short");
            
            public static readonly Type INT = new Type("int");
            
            public static readonly Type FLOAT = new Type("float");
            
            private System.String typeName;
            internal Type(System.String name)
            {
                this.typeName = name;
            }
            /*(non-Javadoc) <see cref="java.lang.Object.toString() */
            public override System.String ToString()
            {
                return GetType().FullName + "::" + typeName;
            }
        }
        
        public FieldScoreQuery(System.String field, Type type):base(GetValueSource(field, type))
        {
        }
        
        // create the appropriate (cached) field value source.  
        private static ValueSource GetValueSource(System.String field, Type type)
        {
            if (type == Type.BYTE)
            {
                return new ByteFieldSource(field);
            }
            if (type == Type.SHORT)
            {
                return new ShortFieldSource(field);
            }
            if (type == Type.INT)
            {
                return new IntFieldSource(field);
            }
            if (type == Type.FLOAT)
            {
                return new FloatFieldSource(field);
            }
            throw new System.ArgumentException(type + " is not a known Field Score Query Type!");
        }
    }
}