/**
* Create a new alias based on source code.
*
* @param db the database
* @param id the id
* @param name the name
* @param source the source code
* @param force create the object even if the class or method does not exist
* @return the database object
*/
public static FunctionAlias newInstanceFromSource(
Database db, int id, String name, String source, boolean force) throws SQLException {
FunctionAlias alias = new FunctionAlias(db, id, name);
alias.source = source;
alias.init(force);
return alias;
}
/**
* Create a new alias based on a method name.
*
* @param db the database
* @param id the id
* @param name the name
* @param javaClassMethod the class and method name
* @param force create the object even if the class or method does not exist
* @return the database object
*/
public static FunctionAlias newInstance(
Database db, int id, String name, String javaClassMethod, boolean force) throws SQLException {
FunctionAlias alias = new FunctionAlias(db, id, name);
int paren = javaClassMethod.indexOf('(');
int lastDot = javaClassMethod.lastIndexOf('.', paren < 0 ? javaClassMethod.length() : paren);
if (lastDot < 0) {
throw Message.getSQLException(ErrorCode.SYNTAX_ERROR_1, javaClassMethod);
}
alias.className = javaClassMethod.substring(0, lastDot);
alias.methodName = javaClassMethod.substring(lastDot + 1);
alias.init(force);
return alias;
}
public String getSQL() {
StatementBuilder buff = new StatementBuilder();
// TODO always append the schema once FUNCTIONS_IN_SCHEMA is enabled
if (functionAlias.getDatabase().getSettings().functionsInSchema
|| !functionAlias.getSchema().getName().equals(Constants.SCHEMA_MAIN)) {
buff.append(Parser.quoteIdentifier(functionAlias.getSchema().getName())).append('.');
}
buff.append(Parser.quoteIdentifier(functionAlias.getName())).append('(');
for (Expression e : args) {
buff.appendExceptFirst(", ");
buff.append(e.getSQL());
}
return buff.append(')').toString();
}
public JavaFunction(FunctionAlias functionAlias, Expression[] args) {
this.functionAlias = functionAlias;
this.javaMethod = functionAlias.findJavaMethod(args);
this.args = args;
}
public boolean isDeterministic() {
return functionAlias.isDeterministic();
}
public String getName() {
return functionAlias.getName();
}