001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.geronimo.deployment.cli;
019
020 import java.io.BufferedReader;
021 import java.io.IOException;
022 import java.io.StringReader;
023
024 import org.apache.geronimo.deployment.plugin.ConfigIDExtractor;
025
026 /**
027 * Various helpers for deployment.
028 *
029 * @version $Rev: 549455 $ $Date: 2007-06-21 08:12:27 -0400 (Thu, 21 Jun 2007) $
030 */
031 public class DeployUtils extends ConfigIDExtractor {
032 /**
033 * Split up an output line so it indents at beginning and end (to fit in a
034 * typical terminal) and doesn't break in the middle of a word.
035 * @param source The unformatted String
036 * @param indent The number of characters to indent on the left
037 * @param endCol The maximum width of the entire line in characters,
038 * including indent (indent 10 with endCol 70 results
039 * in 60 "usable" characters).
040 */
041 public static String reformat(String source, int indent, int endCol) {
042 if(endCol-indent < 10) {
043 throw new IllegalArgumentException("This is ridiculous!");
044 }
045 StringBuffer buf = new StringBuffer((int)(source.length()*1.1));
046 String prefix = indent == 0 ? "" : buildIndent(indent);
047 try {
048 BufferedReader in = new BufferedReader(new StringReader(source));
049 String line;
050 int pos;
051 while((line = in.readLine()) != null) {
052 if(buf.length() > 0) {
053 buf.append('\n');
054 }
055 while(line.length() > 0) {
056 line = prefix + line;
057 if(line.length() > endCol) {
058 pos = line.lastIndexOf(' ', endCol);
059 if(pos < indent) {
060 pos = line.indexOf(' ', endCol);
061 if(pos < indent) {
062 pos = line.length();
063 }
064 }
065 buf.append(line.substring(0, pos)).append('\n');
066 if(pos < line.length()-1) {
067 line = line.substring(pos+1);
068 } else {
069 break;
070 }
071 } else {
072 buf.append(line).append("\n");
073 break;
074 }
075 }
076 }
077 } catch (IOException e) {
078 throw (AssertionError)new AssertionError("This should be impossible").initCause(e);
079 }
080 return buf.toString();
081 }
082
083 private static String buildIndent(int indent) {
084 StringBuffer buf = new StringBuffer(indent);
085 for(int i=0; i<indent; i++) {
086 buf.append(' ');
087 }
088 return buf.toString();
089 }
090
091
092 }