net.sf.log4jdbc.sql.resultsetcollector.ResultSetCollectorPrinter Maven / Gradle / Ivy

/**
 * Copyright 2010 Tim Azzopardi
 *
 * 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 net.sf.log4jdbc.sql.resultsetcollector;

import java.util.List;

/***
 * @author Tim Azzopardi
 * @author Mathieu Seppey 
 * 
 * Update : changed printResultSet into getResultSetToPrint
 * 
 */

public class ResultSetCollectorPrinter {

    /**
     * A StringBuffer which is used to build the formatted table to print
     */
    private StringBuffer table = new StringBuffer(); ;

    /**
     * Default constructor
     */
    public ResultSetCollectorPrinter() {

    }

    /***
     * Return a table which represents a ResultSet,
     * to be printed by a logger,
     * based on the content of the provided resultSetCollector.
     * 
     * This method will be actually called by a SpyLogDelegator
     * when the next() method of the spied ResultSet
     * return false meaning that its end is reached.
     * It will be also called if the ResultSet is closed. 
     * 
     * 
     * @param resultSetCollector the ResultSetCollector which has collected the data we want to print
     * @return A String which contains the formatted table to print
     * 
     * @see net.sf.log4jdbc.ResultSetSpy
     * @see net.sf.log4jdbc.sql.resultsetcollector.DefaultResultSetCollector
     * @see net.sf.log4jdbc.log.SpyLogDelegator
     * 
     */
    public String getResultSetToPrint(ResultSetCollector resultSetCollector) {

        this.table.append(System.getProperty("line.separator"));

        int columnCount = resultSetCollector.getColumnCount();
        int maxLength[] = new int[columnCount];

        for (int column = 1; column <= columnCount; column++) {
            maxLength[column - 1] = resultSetCollector.getColumnName(column)
                    .length();
        }
        if (resultSetCollector.getRows() != null) {
            for (List