/**
* Get an instance of JavaCompiler. If Running with JDK 6, use a Jsr199JavaCompiler that supports
* JSR199, else if eclipse's JDT compiler is available, use that. The default is to use javac from
* ant.
*/
private void initJavaCompiler() throws JasperException {
if (options.getCompilerClassName() != null) {
Class c = getClassFor(options.getCompilerClassName());
try {
javaCompiler = (JavaCompiler) c.newInstance();
} catch (Exception ex) {
}
}
if (javaCompiler == null) {
boolean disablejsr199 =
Boolean.TRUE
.toString()
.equals(System.getProperty("org.apache.jasper.compiler.disablejsr199"));
Double version = Double.valueOf(System.getProperty("java.specification.version"));
if (!disablejsr199 && (version >= 1.6 || getClassFor("javax.tools.Tool") != null)) {
// JDK 6 or bundled with jsr199 compiler
javaCompiler = new Jsr199JavaCompiler();
} else {
Class c = getClassFor("org.eclipse.jdt.internal.compiler.Compiler");
if (c != null) {
c = getClassFor("org.apache.jasper.compiler.JDTJavaCompiler");
if (c != null) {
try {
javaCompiler = (JavaCompiler) c.newInstance();
} catch (Exception ex) {
}
}
}
}
}
if (javaCompiler == null) {
Class c = getClassFor("org.apache.tools.ant.taskdefs.Javac");
if (c != null) {
c = getClassFor("org.apache.jasper.compiler.AntJavaCompiler");
if (c != null) {
try {
javaCompiler = (JavaCompiler) c.newInstance();
} catch (Exception ex) {
}
}
}
}
if (javaCompiler == null) {
errDispatcher.jspError("jsp.error.nojavac");
}
javaCompiler.init(ctxt, errDispatcher, jspcMode);
}
