com.impetus.kundera.index.LuceneQueryUtils Maven / Gradle / Ivy

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/**
 * Copyright 2012 Impetus Infotech.
 *
 * Licensed 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 com.impetus.kundera.index;

/**
 * Provides utility methods for Lucene Query related functionality
 * 
 * @author amresh.singh
 */
public class LuceneQueryUtils
{
    /**
     * Returns lucene based query.
     * 
     * @param clazzFieldName
     *            lucene field name for class
     * @param clazzName
     *            class name
     * @param idFieldName
     *            lucene id field name
     * @param idFieldValue
     *            lucene id field value
     * @return query lucene query.
     */
    public static String getQuery(String clazzFieldName, String clazzName, String idFieldName, String idFieldValue)
    {
        StringBuffer sb = new StringBuffer("+");
        sb.append(clazzFieldName);
        sb.append(":");
        sb.append(clazzName);
        sb.append(" AND ");
        sb.append("+");
        sb.append(idFieldName);
        sb.append(":");
        sb.append(idFieldValue);
        return sb.toString();
    }

    /**
     * Returns lucene based query.
     * 
     * @param clazzFieldName
     *            lucene field name for class
     * @param clazzName
     *            class name
     * @param idFieldName
     *            lucene id field name
     * @param idFieldValue
     *            lucene id field value
     * @param entityClazz
     *            the entity clazz
     * @return query lucene query.
     */
    public static String getQuery(String clazzFieldName, String clazzName, String idFieldName, Object idFieldValue,
            String entityClazz)
    {
        StringBuffer sb = new StringBuffer("+");
        sb.append(clazzFieldName);
        sb.append(":");
        sb.append(clazzName);
        sb.append(" AND ");
        sb.append("+");
        sb.append(idFieldName);
        sb.append(":");
        sb.append(idFieldValue);
        if (entityClazz != null)
        {
            sb.append(" AND ");
            sb.append("+");
            sb.append(IndexingConstants.ENTITY_CLASS_FIELD);
            sb.append(":");
            sb.append(entityClazz);
        }
        return sb.toString();
    }

}