001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     * http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    package org.apache.commons.csv.writer;
020    
021    import java.io.Writer;
022    import java.util.Arrays;
023    import java.util.Map;
024    
025    
026    /**
027     * CSVWriter
028     *
029     * @author Martin van den Bemt
030     * @version $Id: $
031     */
032    public class CSVWriter {
033    
034        /**
035         * The CSV config *
036         */
037        private CSVConfig config;
038        /**
039         * The writer *
040         */
041        private Writer writer;
042    
043        /**
044         *
045         */
046        public CSVWriter() {
047        }
048    
049        public CSVWriter(CSVConfig config) {
050            setConfig(config);
051        }
052    
053        public void writeRecord(Map map) {
054            CSVField[] fields = config.getFields();
055            try {
056                StringBuffer sb = new StringBuffer();
057                for (int i = 0; i < fields.length; i++) {
058                    Object o = map.get(fields[i].getName());
059                    if (o != null) {
060                        String value = o.toString();
061                        value = writeValue(fields[i], value);
062                        sb.append(value);
063                    }
064                    if (!config.isDelimiterIgnored() && fields.length != (i + 1)) {
065                        sb.append(config.getDelimiter());
066                    }
067                }
068                if (config.isEndTrimmed()) {
069                    for (int i = sb.length() - 1; i >= 0; i--) {
070                        System.out.println("i : " + i);
071                        if (Character.isWhitespace(sb.charAt(i))) {
072                            sb.deleteCharAt(i);
073                        } else {
074                            break;
075                        }
076                    }
077                }
078                sb.append(config.getRowDelimiter());
079                String line = sb.toString();
080                writer.write(line);
081            } catch (Exception e) {
082                e.printStackTrace();
083            }
084        }
085    
086        protected String writeValue(CSVField field, String value) throws Exception {
087            if (config.isFixedWidth()) {
088                if (value.length() < field.getSize()) {
089                    int fillPattern = config.getFill();
090                    if (field.overrideFill()) {
091                        fillPattern = field.getFill();
092                    }
093                    StringBuffer sb = new StringBuffer();
094                    int fillSize = (field.getSize() - value.length());
095                    char[] fill = new char[fillSize];
096                    Arrays.fill(fill, config.getFillChar());
097                    if (fillPattern == CSVConfig.FILLLEFT) {
098                        sb.append(fill);
099                        sb.append(value);
100                        value = sb.toString();
101                    } else {
102                        // defaults to fillpattern FILLRIGHT when fixedwidth is used
103                        sb.append(value);
104                        sb.append(fill);
105                        value = sb.toString();
106                    }
107                } else if (value.length() > field.getSize()) {
108                    // value to big..
109                    value = value.substring(0, field.getSize());
110                }
111            }
112            if (!config.isValueDelimiterIgnored()) {
113                // add the value delimiter..
114                value = config.getValueDelimiter() + value + config.getValueDelimiter();
115            }
116            return value;
117        }
118    
119        /**
120         * @return the CVSConfig or null if not present
121         */
122        public CSVConfig getConfig() {
123            return config;
124        }
125    
126        /**
127         * Set the CSVConfig
128         *
129         * @param config the CVSConfig
130         */
131        public void setConfig(CSVConfig config) {
132            this.config = config;
133        }
134    
135        /**
136         * Set the writer to write the CSV file to.
137         *
138         * @param writer the writer.
139         */
140        public void setWriter(Writer writer) {
141            this.writer = writer;
142        }
143    
144    }