1 package org.eclipse.jetty.start;
2 //========================================================================
3 //Copyright (c) 2006-2012 Mort Bay Consulting Pty. Ltd.
4 //------------------------------------------------------------------------
5 //All rights reserved. This program and the accompanying materials
6 //are made available under the terms of the Eclipse Public License v1.0
7 //and Apache License v2.0 which accompanies this distribution.
8 //The Eclipse Public License is available at
9 //http://www.eclipse.org/legal/epl-v10.html
10 //The Apache License v2.0 is available at
11 //http://www.opensource.org/licenses/apache2.0.php
12 //You may elect to redistribute this code under either of these licenses.
13 //========================================================================
14
15 import java.util.ArrayList;
16 import java.util.List;
17
18 public class CommandLineBuilder
19 {
20 private List<String> args;
21
22 public CommandLineBuilder(String bin)
23 {
24 args = new ArrayList<String>();
25 args.add(bin);
26 }
27
28 /**
29 * Add a simple argument to the command line.
30 * <p>
31 * Will quote arguments that have a space in them.
32 *
33 * @param arg
34 * the simple argument to add
35 */
36 public void addArg(String arg)
37 {
38 args.add(quote(arg));
39 }
40
41 /**
42 * Similar to {@link #addArg(String)} but concats both name + value with an "=" sign, quoting were needed, and excluding the "=" portion if the value is
43 * undefined or empty.
44 * <p>
45 *
46 * <pre>
47 * addEqualsArg("-Dname", "value") = "-Dname=value"
48 * addEqualsArg("-Djetty.home", "/opt/company inc/jetty (7)/") = "-Djetty.home=/opt/company\ inc/jetty\ (7)/"
49 * addEqualsArg("-Djenkins.workspace", "/opt/workspaces/jetty jdk7/") = "-Djenkins.workspace=/opt/workspaces/jetty\ jdk7/"
50 * addEqualsArg("-Dstress", null) = "-Dstress"
51 * addEqualsArg("-Dstress", "") = "-Dstress"
52 * </pre>
53 *
54 * @param name
55 * the name
56 * @param value
57 * the value
58 */
59 public void addEqualsArg(String name, String value)
60 {
61 if (value != null && value.length() > 0)
62 {
63 args.add(quote(name + "=" + value));
64 }
65 else
66 {
67 args.add(quote(name));
68 }
69 }
70
71 /**
72 * Add a simple argument to the command line.
73 * <p>
74 * Will <b>NOT</b> quote/escape arguments that have a space in them.
75 *
76 * @param arg
77 * the simple argument to add
78 */
79 public void addRawArg(String arg)
80 {
81 args.add(arg);
82 }
83
84 public List<String> getArgs()
85 {
86 return args;
87 }
88
89 /**
90 * Perform an optional quoting of the argument, being intelligent with spaces and quotes as needed.
91 *
92 * @param arg
93 * @return
94 */
95 public static String quote(String arg)
96 {
97 boolean needsQuoting = arg.indexOf(' ') >= 0 || arg.indexOf('"') >= 0;
98 if (!needsQuoting)
99 {
100 return arg;
101 }
102 StringBuilder buf = new StringBuilder();
103 // buf.append('"');
104 boolean escaped = false;
105 for (char c : arg.toCharArray())
106 {
107 if (!escaped && ((c == '"') || (c == ' ')))
108 {
109 buf.append("\\");
110 }
111 escaped = (c == '\\');
112 buf.append(c);
113 }
114 // buf.append('"');
115 return buf.toString();
116 }
117
118 @Override
119 public String toString()
120 {
121 StringBuilder buf = new StringBuilder();
122
123 boolean delim = false;
124 for (String arg : args)
125 {
126 if (delim)
127 {
128 buf.append(' ');
129 }
130 buf.append(arg);
131 delim = true;
132 }
133
134 return buf.toString();
135 }
136 }