/** Load a group file with full path fileName; it's relative to root by prefix. */
public void loadGroupFile(String prefix, String fileName) {
// System.out.println("load group file prefix="+prefix+", fileName="+fileName);
GroupParser parser = null;
try {
URL f = new URL(fileName);
ANTLRInputStream fs = new ANTLRInputStream(f.openStream(), encoding);
GroupLexer lexer = new GroupLexer(fs);
fs.name = fileName;
CommonTokenStream tokens = new CommonTokenStream(lexer);
parser = new GroupParser(tokens);
parser.group(this, prefix);
} catch (Exception e) {
errMgr.IOError(null, ErrorType.CANT_LOAD_GROUP_FILE, e, fileName);
}
}
/**
* Import template files, directories, and group files. Priority is given to templates defined in
* the current group; this, in effect, provides inheritance. Polymorphism is in effect so that if
* an inherited template references template t() then we search for t() in the subgroup first.
*
* <p>If you specify an absolute file name or directory name, the import statement uses that
* directly. If it is not an absolute path, we look that entity up in the directory holding the
* group that initiates the import. If file or directory is not in that directory, then we load
* using the classpath.
*
* <p>Templates are loaded on-demand from import dirs. Imported groups are loaded on-demand when
* searching for a template.
*
* <p>The listener of this group is passed to the import group so errors found while loading
* imported element are sent to listener of this group.
*/
public void importTemplates(Token fileNameToken) {
String fileName = fileNameToken.getText();
// do nothing upon syntax error
if (fileName == null || fileName.equals("<missing STRING>")) return;
fileName = Misc.strip(fileName, 1);
// System.out.println("import "+fileName);
boolean isGroupFile = fileName.endsWith(".stg");
boolean isTemplateFile = fileName.endsWith(".st");
boolean isGroupDir = !(isGroupFile || isTemplateFile);
STGroup g = null;
File f = new File(fileName);
if (f.isAbsolute()) { // load directly if absolute
if (isTemplateFile) {
g = new STGroup();
g.setListener(this.getListener());
g.loadAbsoluteTemplateFile(fileName);
} else if (isGroupFile) {
g = new STGroupFile(fileName, delimiterStartChar, delimiterStopChar);
g.setListener(this.getListener());
} else if (isGroupDir) {
g = new STGroupDir(fileName, delimiterStartChar, delimiterStopChar);
g.setListener(this.getListener());
}
importTemplates(g);
return;
}
// it's a relative name; search path is working dir, g.stg's dir, CLASSPATH
URL thisRoot = getRootDirURL();
URL fileUnderRoot = null;
// System.out.println("thisRoot="+thisRoot);
try {
fileUnderRoot = new URL(thisRoot + "/" + fileName);
} catch (MalformedURLException mfe) {
errMgr.internalError(null, "can't build URL for " + thisRoot + "/" + fileName, mfe);
return;
}
if (isTemplateFile) {
g = new STGroup();
g.setListener(this.getListener());
URL fileURL;
if (Misc.urlExists(fileUnderRoot)) fileURL = fileUnderRoot;
else fileURL = getURL(fileName); // try CLASSPATH
if (fileURL != null) {
try {
InputStream s = fileURL.openStream();
ANTLRInputStream templateStream = new ANTLRInputStream(s);
templateStream.name = fileName;
CompiledST code = g.loadTemplateFile("", fileName, templateStream);
if (code == null) g = null;
} catch (IOException ioe) {
errMgr.internalError(null, "can't read from " + fileURL, ioe);
g = null;
}
} else {
g = null;
}
} else if (isGroupFile) {
// System.out.println("look for fileUnderRoot: "+fileUnderRoot);
if (Misc.urlExists(fileUnderRoot)) {
g = new STGroupFile(fileUnderRoot, encoding, delimiterStartChar, delimiterStopChar);
g.setListener(this.getListener());
} else {
g = new STGroupFile(fileName, delimiterStartChar, delimiterStopChar);
g.setListener(this.getListener());
}
} else if (isGroupDir) {
// System.out.println("try dir "+fileUnderRoot);
if (Misc.urlExists(fileUnderRoot)) {
g = new STGroupDir(fileUnderRoot, encoding, delimiterStartChar, delimiterStopChar);
g.setListener(this.getListener());
} else {
// try in CLASSPATH
// System.out.println("try dir in CLASSPATH "+fileName);
g = new STGroupDir(fileName, delimiterStartChar, delimiterStopChar);
g.setListener(this.getListener());
}
}
if (g == null) {
errMgr.compileTimeError(ErrorType.CANT_IMPORT, null, fileNameToken, fileName);
} else {
importTemplates(g);
}
}
