org.apache.openmeetings.utils.DaoHelper.java Source code

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Here is the source code for org.apache.openmeetings.utils.DaoHelper.java

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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.
 */
package org.apache.openmeetings.utils;

import org.apache.commons.lang.StringUtils;

public class DaoHelper {

    public static String getSearchQuery(String table, String alias, String search, boolean filterDeleted,
            boolean count, String sort, String... fields) {
        return getSearchQuery(table, alias, search, filterDeleted, count, null, sort, fields);
    }

    public static String getSearchQuery(String table, String alias, String search, boolean filterDeleted,
            boolean count, String additionalWhere, String sort, String... fields) {
        StringBuilder sb = new StringBuilder("SELECT ");
        if (count) {
            sb.append("COUNT(").append(alias).append(")");
        } else {
            sb.append(alias);
        }
        sb.append(" FROM ").append(table).append(" ").append(alias);
        boolean whereAdded = false;
        if (filterDeleted) {
            whereAdded = true;
            sb.append(" WHERE ").append(alias).append(".deleted = false ");
        }
        StringBuilder where = DaoHelper.getWhereClause(search, alias, fields);
        if (where.length() > 0) {
            if (!whereAdded) {
                whereAdded = true;
                sb.append(" WHERE ");
            } else {
                sb.append("AND ");
            }
            sb.append(where);
        }
        if (additionalWhere != null && !additionalWhere.trim().isEmpty()) {
            if (!whereAdded) {
                whereAdded = true;
                sb.append(" WHERE ");
            } else {
                sb.append("AND ");
            }
            sb.append(additionalWhere);
        }
        if (sort != null && !sort.trim().isEmpty()) {
            sb.append(" ORDER BY ").append(alias).append(".").append(sort);
        }
        return sb.toString();
    }

    public static StringBuilder getWhereClause(String search, String alias, String... fields) {
        StringBuilder sb = new StringBuilder();
        getWhereClause(sb, search, alias, fields);
        return sb;
    }

    public static void getWhereClause(StringBuilder sb, String search, String alias, String... fields) {
        if (search != null) {
            boolean notEmpty = false;
            String[] searchItems = search.split(" ");
            for (int i = 0; i < searchItems.length; ++i) {
                if (searchItems[i].isEmpty()) {
                    continue;
                }
                if (i == 0) {
                    notEmpty = true;
                    sb.append(" (");
                } else {
                    sb.append(" OR ");
                }
                StringBuilder placeholder = new StringBuilder();
                placeholder.append("%").append(StringUtils.lowerCase(searchItems[i])).append("%");

                sb.append("(");
                for (int j = 0; j < fields.length; ++j) {
                    if (j != 0) {
                        sb.append(" OR ");
                    }
                    sb.append("lower(").append(alias).append(".").append(fields[j]).append(") LIKE '")
                            .append(placeholder).append("' ");
                }
                sb.append(")");
            }
            if (notEmpty) {
                sb.append(") ");
            }
        }
    }
}