Source Code Cross Referenced for CSVSink.java in  » Testing » Marathon » com » ziclix » python » sql » pipe » csv » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » Marathon » com.ziclix.python.sql.pipe.csv 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Jython Database Specification API 2.0
003:         *
004:         * $Id: CSVSink.java 2414 2005-02-23 04:26:23Z bzimmer $
005:         *
006:         * Copyright (c) 2001 brian zimmer <bzimmer@ziclix.com>
007:         *
008:         */
009:        package com.ziclix.python.sql.pipe.csv;
010:
011:        import com.ziclix.python.sql.pipe.Sink;
012:        import org.python.core.Py;
013:        import org.python.core.PyObject;
014:
015:        import java.io.PrintWriter;
016:
017:        /**
018:         * The CSVSink writes data out in a Comma Seperated Format.
019:         *
020:         * @author brian zimmer
021:         * @version $Revision: 2414 $
022:         */
023:        public class CSVSink implements  Sink {
024:
025:            /**
026:             * Field header
027:             */
028:            protected boolean header;
029:
030:            /**
031:             * Field delimiter
032:             */
033:            protected String delimiter;
034:
035:            /**
036:             * Field writer
037:             */
038:            protected PrintWriter writer;
039:
040:            /**
041:             * Field converters
042:             */
043:            protected PyObject converters;
044:
045:            /**
046:             * All data will be written to the given PrintWriter.
047:             *
048:             * @param writer the PrintWriter to which data will be written
049:             */
050:            public CSVSink(PrintWriter writer) {
051:                this (writer, Py.None);
052:            }
053:
054:            /**
055:             * All data will be written to the given PrintWriter.  If
056:             * the converters param is not None, then an attempt will
057:             * be made to convert the object using the given converter.
058:             *
059:             * @param writer     the PrintWriter to which data will be written
060:             * @param converters an indexed dictionary of callable objects used for converting objects to strings
061:             */
062:            public CSVSink(PrintWriter writer, PyObject converters) {
063:
064:                this .header = false;
065:                this .writer = writer;
066:                this .converters = converters;
067:                this .delimiter = ",";
068:            }
069:
070:            /**
071:             * Handle the data callback and write the row out.
072:             */
073:            public void row(PyObject row) {
074:
075:                String[] values = new String[row.__len__()];
076:
077:                if (this .header) {
078:                    for (int i = 0; i < row.__len__(); i++) {
079:                        values[i] = this .convert(Py.newInteger(i), row
080:                                .__getitem__(i));
081:                    }
082:                } else {
083:                    for (int i = 0; i < row.__len__(); i++) {
084:                        values[i] = row.__getitem__(i).__getitem__(0)
085:                                .toString();
086:                    }
087:
088:                    this .header = true;
089:                }
090:
091:                this .println(values);
092:            }
093:
094:            /**
095:             * Convert the object at index to a String.
096:             */
097:            protected String convert(PyObject index, PyObject object) {
098:
099:                if (this .converters != Py.None) {
100:                    PyObject converter = this .converters.__finditem__(index);
101:
102:                    if (converter != Py.None) {
103:                        object = converter.__call__(object);
104:                    }
105:                }
106:
107:                if ((object == Py.None) || (object == null)) {
108:                    return "";
109:                }
110:
111:                return CSVString.toCSV(object.toString());
112:            }
113:
114:            /**
115:             * Print the row of Strings.
116:             */
117:            protected void println(String[] row) {
118:
119:                for (int i = 0; i < row.length - 1; i++) {
120:                    this .writer.print(row[i]);
121:                    this .writer.print(this .delimiter);
122:                }
123:
124:                this .writer.println(row[row.length - 1]);
125:            }
126:
127:            /**
128:             * Method start
129:             */
130:            public void start() {
131:            }
132:
133:            /**
134:             * Method end
135:             */
136:            public void end() {
137:            }
138:        }
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