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/*
* SunJavaCompiler.java
* Workaround for Runtime.exec() environment handling incompatibility..
*
* A work based on jp.ac.tsukuba.openjava.SunJavaCompiler
*
* Apr 16, 1999 Michiaki Tatsubori (mt@is.tsukuba.ac.jp)
* Oct 1, 1999 Shiro Kawai (shiro@squareusa.com)
* Nov 22, 1999 Michiaki Tatsubori
*/
package jp.ac.tsukuba.openjava;
import java.io.BufferedInputStream;
import java.io.InputStream;
import io.devnulllabs.openjava.ojc.JavaCompiler;
/**
* The class <code>SunJavaCompiler</code> is an adapter for Sun's javac.
*
* Message-Id: 19990930154627G.shiro@squareusa.com
* <p>
* I tried OpenJava1.0a1 on my IRIX box w/ SGI's JDK1.2
* and had a problem to run ojc. Somehow, Runtime.exec()
* didn't pass all the environment variables to the invoked
* process (more specifically, it only passed TZ).
* Consequently the CLASSPATH env was not passed to javac kicked
* by JP.ac.tsukuba.openjava.SunJavaCompiler.complie(), which
* prevented ojc from finishing compilation.
* <p>
* So far I couldn't find exact specification about how the
* environment variables should be treated in Java specification
* and API documents. I guess it may depend on platforms.
* <p>
* We avoided the problem by explicitly passing CLASSPATH to
* the subprocess my modifying SunJavaCompiler class, but wondering
* if there'd be a better way to handle it...
*/
public class SunJavaCompiler implements JavaCompiler {
public static void main(String[] args) {
new SunJavaCompiler().compile(args);
}
public void compile(String[] args) {
Runtime runtime = Runtime.getRuntime();
try {
String classpath =
"CLASSPATH=" + System.getProperty("java.class.path");
String[] envp = new String[1];
envp[0] = classpath;
Process p = runtime.exec("javac " + strs2str(args), envp);
InputStream in = new BufferedInputStream(p.getErrorStream());
byte[] buf = new byte[1024];
for (int len = in.read(buf); len != -1; len = in.read(buf)) {
System.err.write(buf, 0, len);
}
p.waitFor();
} catch (Exception e) {
e.printStackTrace();
}
}
private static String strs2str(String[] strs) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < strs.length; ++i) {
buf.append(strs[i]).append(" ");
}
return buf.toString();
}
}
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