/**
* Compile the class from Java source
*
* @return the bytes that comprise the class file
*/
public byte[] compile() {
if (null != javaByteCode) return javaByteCode;
if (null == javaSource)
throw new IllegalStateException("Cannot find java source when compiling " + getKey());
compiling = true;
long start = System.currentTimeMillis();
try {
engine().classes.compiler.compile(new String[] {name()});
if (logger.isTraceEnabled()) {
logger.trace("%sms to compile template: %s", System.currentTimeMillis() - start, getKey());
}
} catch (CompileException.CompilerException e) {
String cn = e.className;
TemplateClass tc = S.isEqual(cn, name()) ? this : engine().classes.getByClassName(cn);
if (null == tc) tc = this;
CompileException ce =
new CompileException(
tc,
e.javaLineNumber,
e.message); // init ce before reset java source to get template line info
if (engine().isProdMode()) {
TextBuilder tb = new TextBuilder();
String[] lines = javaSource.split("(\\n\\r|\\r\\n|\\r|\\n)");
for (int line = 0; line < lines.length; ++line) {
tb.p(line + 1).p(":").p(lines[line]).p("\n");
}
logger.error("error compiling java source:\n%s", tb.toString());
}
javaSource =
null; // force parser to regenerate source. This helps to reload after fixing the tag file
// compilation failure
throw ce;
} catch (NullPointerException e) {
String clazzName = name();
TemplateClass tc = engine().classes.getByClassName(clazzName);
if (this != tc) {
logger.error("tc is not this");
}
if (!this.equals(tc)) {
logger.error("tc not match this");
}
logger.error("NPE encountered when compiling template class:" + name());
throw e;
} finally {
compiling = false;
}
if (logger.isTraceEnabled()) {
logger.trace(
"%sms to compile template class %s", System.currentTimeMillis() - start, getKey());
}
return javaByteCode;
}