Source Code Cross Referenced for NativeCommandInputSource.java in  » Database-JDBC-Connection-Pool » sequoia-2.10.9 » org » continuent » sequoia » controller » backup » backupers » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » sequoia 2.10.9 » org.continuent.sequoia.controller.backup.backupers 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Sequoia: Database clustering technology.
003:         * Copyright (C) 2006 Continuent, Inc.
004:         * Contact: sequoia@continuent.org
005:         * 
006:         * Licensed under the Apache License, Version 2.0 (the "License");
007:         * you may not use this file except in compliance with the License.
008:         * 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, software
013:         * distributed under the License is distributed on an "AS IS" BASIS,
014:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015:         * See the License for the specific language governing permissions and
016:         * limitations under the License. 
017:         *
018:         * Initial developer(s): Emmanuel Cecchet.
019:         * Contributor(s): ______________________.
020:         */package org.continuent.sequoia.controller.backup.backupers;
021:
022:        import java.io.BufferedOutputStream;
023:        import java.io.IOException;
024:        import java.io.InputStream;
025:        import java.io.OutputStream;
026:
027:        /**
028:         * This class defines a NativeCommandInputSource, which provides input
029:         * to processes.  Current implementation could be extended to use
030:         * interfaces but this works for now. 
031:         * 
032:         * @author <a href="mailto:robert.hodges@continuent.com">Robert Hodges</a>
033:         * @version 1.0
034:         */
035:        public class NativeCommandInputSource {
036:            String[] inputStringArray;
037:            InputStream inputStream;
038:
039:            /**
040:             * Creates a new <code>NativeCommandInputSource</code> object to read
041:             * from a strings of arrays.  
042:             */
043:            public NativeCommandInputSource(String[] arrayInput) {
044:                this .inputStringArray = arrayInput;
045:            }
046:
047:            /**
048:             * Creates a new <code>NativeCommandInputSource</code> object to read
049:             * from an InputStream. 
050:             * @param inputStream An open input stream
051:             */
052:            public NativeCommandInputSource(InputStream inputStream) {
053:                this .inputStream = inputStream;
054:            }
055:
056:            /**
057:             * Factory method to create an input source that reads arrays. 
058:             * 
059:             * @param inputArray Array of string inputs.  
060:             * @return Configured input source
061:             */
062:            public static NativeCommandInputSource createArrayInputSource(
063:                    String[] inputArray) {
064:                if (inputArray == null)
065:                    return null;
066:                else
067:                    return new NativeCommandInputSource(inputArray);
068:            }
069:
070:            /**
071:             * Factory method to create an input source that reads arrays. 
072:             * 
073:             * @param inputStream An open InputStream containing input
074:             * @return Configured input source
075:             */
076:            public static NativeCommandInputSource createInputStreamSource(
077:                    InputStream inputStream) {
078:                if (inputStream == null)
079:                    return null;
080:                else
081:                    return new NativeCommandInputSource(inputStream);
082:            }
083:
084:            /**
085:             * Writes all available input to the native command process, returning
086:             * when the input source is exhausted. 
087:             *
088:             * @param outputStream Stream that feeds input to process
089:             * @throws IOException Thrown if there is an IO error
090:             */
091:            public void write(OutputStream outputStream) throws IOException {
092:                if (inputStringArray != null) {
093:                    // Write array input. 
094:                    BufferedOutputStream feed = new BufferedOutputStream(
095:                            outputStream);
096:                    for (int i = 0; i < inputStringArray.length; i++) {
097:                        feed.write(inputStringArray[i].getBytes());
098:                        feed.write("\n".getBytes());
099:                        feed.flush();
100:                    }
101:                } else {
102:                    // Write output from stream. 
103:                    byte[] buff = new byte[1024];
104:                    int len = 0;
105:                    while ((len = inputStream.read(buff)) > 0) {
106:                        outputStream.write(buff, 0, len);
107:                    }
108:                }
109:            }
110:
111:            /**
112:             * Closes the input source. 
113:             * 
114:             * @throws IOException Thrown if there is an error during the close 
115:             * operation
116:             */
117:            public void close() throws IOException {
118:                if (inputStringArray != null) {
119:                    // Do nothing
120:                } else {
121:                    inputStream.close();
122:                }
123:            }
124:        }
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