private void generateSignatures(AnnotationInfo info) throws IOException {
write("\\begin{description}");
for (SignatureInfo sig : info.signatureInfos) {
write("\n\\item [$" + info.name + ":$ ] $");
String delim = "";
int correction = 0;
for (int i = 0; i < sig.signature.parameterTypes.length; i++) {
if (sig.signature.parameterTypes[i] == InternalGreqlEvaluator.class) {
correction++;
continue;
}
write(delim);
write(Types.getGreqlTypeName(sig.signature.parameterTypes[i]));
write("\\; ");
write(sig.params[i - correction]);
delim = " \\times ";
}
write(" \\longrightarrow ");
write(Types.getGreqlTypeName(sig.signature.evaluateMethod.getReturnType()));
write("$");
if (sig.description != null) {
write("\\\\\n\t");
write(sig.description);
}
}
write("\n\\end{description}");
}
public static final Object apply(FunctionInfo fi, Object... args) {
assert fi != null;
if (!fi.acceptsUndefinedValues) {
for (Object arg : args) {
if ((arg == null) || (arg == Undefined.UNDEFINED)) {
return Undefined.UNDEFINED;
}
}
}
for (Signature sig : fi.signatures) {
if (sig.matches(args)) {
try {
Object result = sig.evaluateMethod.invoke(fi.function, args);
assert Types.isValidGreqlValue(result);
return result == null ? Undefined.UNDEFINED : result;
} catch (IllegalArgumentException e) {
if (e.getCause() instanceof GreqlException) {
throw (GreqlException) e.getCause();
} else {
throw new GreqlException(
"When applying function " + fi.name + ": " + e.getMessage(), e.getCause());
}
} catch (IllegalAccessException e) {
if (e.getCause() instanceof GreqlException) {
throw (GreqlException) e.getCause();
} else {
throw new GreqlException(
"When applying function " + fi.name + ": " + e.getMessage(), e.getCause());
}
} catch (InvocationTargetException e) {
if (e.getCause() instanceof GreqlException) {
throw (GreqlException) e.getCause();
} else {
throw new GreqlException(
"When applying function " + fi.name + ": " + e.getMessage(), e.getCause());
}
}
}
}
StringBuilder sb = new StringBuilder();
sb.append("Function '").append(fi.name).append("' not defined for argument types (");
String delim = "";
for (Object arg : args) {
sb.append(delim).append(Types.getGreqlTypeName(arg));
delim = ", ";
}
sb.append(")");
throw new GreqlException(sb.toString());
}
private static final boolean validArgumentTypes(Object[] args) {
for (Object arg : args) {
if (!Types.isValidGreqlValue(arg)) {
throw new GreqlException(
"Type unknown to GReQL: " + arg.getClass().getName() + ", value: " + arg);
}
}
return true;
}
public static final String getArgumentAsString(Object arg) {
if (arg == null) {
arg = Undefined.UNDEFINED;
}
StringBuilder sb = new StringBuilder();
sb.append(Types.getGreqlTypeName(arg));
if (arg instanceof String) {
sb.append(": ").append('"').append(arg.toString().replace("\"", "\\\"")).append('"');
} else if (!(arg instanceof Graph) && !(arg instanceof Undefined)) {
sb.append(": ").append(arg);
}
return sb.toString();
}
public final String getHtmlDescription() {
StringBuilder sb = new StringBuilder();
sb.append("<html><body><p>GReQL function <font color=\"blue\"><strong>")
.append(name)
.append("</strong></font></p><dl>");
assert (functionClass.getConstructors().length == 1);
Constructor<?> cons = functionClass.getConstructors()[0];
Description consDesc = cons.getAnnotation(Description.class);
for (Signature sig : signatures) {
Description funDesc = sig.evaluateMethod.getAnnotation(Description.class);
if (funDesc == null) {
funDesc = consDesc;
}
if (funDesc == null) {
continue;
}
Class<?> ret = sig.evaluateMethod.getReturnType();
String returnType = Types.getGreqlTypeName(ret);
boolean acceptsType =
sig.parameterTypes[sig.parameterTypes.length - 1] == TypeCollection.class;
sb.append("<dt><strong><font color=\"purple\">")
.append(returnType)
.append(" <font color=\"blue\">")
.append(name)
.append("</font></strong>");
if (acceptsType) {
sb.append(" { <font color=\"#008000\">types...</font> } ");
}
sb.append("(");
String delim = "";
int i = 0;
for (String p : funDesc.params()) {
if ((i == 0) && needsGraphArgument) {
// don't show Graph argument
++i;
continue;
}
if ((i == 0) && needsEvaluatorArgument) {
// don't show evaluator argument
++i;
continue;
}
if ((i == (sig.parameterTypes.length - 1)) && acceptsType) {
// don't show TypeCollection argument
++i;
continue;
}
Class<?> cls = sig.parameterTypes[i++];
String type = Types.getGreqlTypeName(cls);
sb.append(delim)
.append("<strong><font color=\"purple\">")
.append(type)
.append("</font></strong> ")
.append(p);
delim = ", ";
}
sb.append(")</dt><dd>").append(funDesc.description()).append("</dd>");
}
sb.append("</dl></body></html>");
return sb.toString();
}