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NextReports Engine is a lightweight Java platform development library which can be used to run NextReports inside your applications.

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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 ro.nextreports.engine.querybuilder.sql;

import ro.nextreports.engine.querybuilder.sql.output.Output;
import ro.nextreports.engine.querybuilder.sql.output.Outputable;
import ro.nextreports.engine.querybuilder.sql.output.ToStringer;

/**
 * @author Decebal Suiu
 */
public abstract class Criteria implements Outputable {

    public abstract void write(Output out);

    public String toString() {
        return ToStringer.toString(this);
    }

    protected String quote(String s) {
        if (s == null) {
            return "null";
        }
        StringBuffer sb = new StringBuffer();
        sb.append('\'');
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) == '\\'
                    || s.charAt(i) == '\"'
                    || s.charAt(i) == '\'') {
                sb.append('\\');
            }
            sb.append(s.charAt(i));
        }
        sb.append('\'');
        
        return sb.toString();
    }

}