|
1 package com.quadcap.http.servlets.jsp;
2
3
40
41 import java.io.ByteArrayOutputStream  ;
42 import java.io.File ;
43 import java.io.FileInputStream ;
44 import java.io.FileOutputStream ;
45 import java.io.IOException ;
46 import java.io.InputStream ;
47 import java.io.OutputStream ;
48
49 import java.util.Properties ;
50
51 import javax.servlet.ServletContext ;
52
53 import com.quadcap.http.server22.WebApplication;
54
55 import com.quadcap.io.IO;
56
57 import com.quadcap.util.Debug;
58
59
64 public class JavaCompiler {
65 File root;
66 String compileCmd;
67 String contextClassPath = "";
68 Properties defaultProps;
69
70 public JavaCompiler() {}
71
72 public void init(ServletContext context, File root,
73 String compileCmd, Properties defaultProps) {
74 this.root = root;
75 this.compileCmd = compileCmd;
76 this.defaultProps = defaultProps;
77 if (context instanceof WebApplication) {
78 WebApplication app = (WebApplication)context;
79 contextClassPath = app.getContextClassPath();
80 }
81 }
82
83 private Thread copyOutput(final OutputStream os,
84 final InputStream is) {
85 return new Thread () {
86 public void run() {
87 int c;
88 try {
89 IO.copyStream(is, os);
90 } catch (IOException e) {
91 }
92 }
93 };
94 }
95
96 String getCompileCommand(Properties props) {
97 StringBuffer sb = new StringBuffer ();
98 StringBuffer nb = new StringBuffer ();
99 int state = 0;
100 for (int i = 0; i < compileCmd.length(); i++) {
101 char c = compileCmd.charAt(i);
102 switch (state) {
103 case 0:
104 if (c == '%') {
105 state = 1;
106 nb.setLength(0);
107 } else {
108 sb.append(c);
109 }
110 break;
111 case 1:
112 if (c == '%') {
113 sb.append(c);
114 state = 0;
115 } else {
116 nb.append(c);
117 state = 2;
118 }
119 break;
120 case 2:
121 if (c == '%') {
122 sb.append(props.getProperty(nb.toString()));
123 state = 0;
124 } else {
125 nb.append(c);
126 }
127 }
128 }
129 return sb.toString();
130 }
131
132 public boolean doCompile(String cmd, OutputStream out)
133 throws IOException
134 {
135 Process p = Runtime.getRuntime().exec(cmd);
136 Thread errthread = copyOutput(out, p.getErrorStream());
137 Thread outthread = copyOutput(out, p.getInputStream());
138 errthread.start();
139 outthread.start();
140 int res = -1;
141 try { res = p.waitFor(); } catch (Throwable t) {}
142 try { errthread.join(); } catch (Throwable t) {}
143 try { outthread.join(); } catch (Throwable t) {}
144 return res == 0;
145 }
146
147 public void compile(File javaFile, File classFile)
148 throws IOException , ClassNotFoundException , JspException
149 {
150 Properties cprops = new Properties (defaultProps);
151 cprops.put("source", javaFile.getPath());
152 cprops.put("repository", root.getPath());
153 cprops.put("context.classpath", contextClassPath);
154 String cmd = getCompileCommand(cprops);
155 if (Trace.level() > 2) {
156 Debug.println("COMPILE: " + cmd);
157 }
158 ByteArrayOutputStream bos = new ByteArrayOutputStream ();
159 boolean ok = doCompile(cmd, bos);
160 if (Trace.level() > 3) {
161 Debug.println("COMPILE OUTPUT: " + bos.toString());
162 }
163 if (!ok) {
164 throw new JspException("compile failed: " + bos.toString());
165 }
166 if (!classFile.exists()) {
167 throw new ClassNotFoundException ("No class file generated by compile: " +
168 bos.toString());
169 }
170 }
171
172 public static void main(String args[]) {
174 String cmd = "./jikes -classpath %java.class.path%;%repository%;%java.home%/lib/rt.jar -d %repository% +D +E -nowarn %source%";
175 Properties props = System.getProperties();
176 try {
177 JavaCompiler jc = new JavaCompiler();
178 jc.init(null, new File ("./repository"), cmd, props);
179 File j = new File ("./repository/__jsp/login.java");
180 File c = new File ("./repository/__jsp/login.class");
181 jc.compile(j, c);
182 } catch (Throwable tt) {
183 tt.printStackTrace(System.err);
184 }
185 }
186 }
188 |
Popular Tags |
Java API By Example, From Geeks To Geeks.