org.hibernate.dialect.function.SQLFunctionRegistry Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.dialect.function;
import java.util.HashMap;
import java.util.Map;
import org.hibernate.dialect.Dialect;
/**
* Defines a registry for SQLFunction instances
*
* @author Steve Ebersole
*/
public class SQLFunctionRegistry {
private final Dialect dialect;
private final Map userFunctions;
/**
* Constructs a SQLFunctionRegistry
*
* @param dialect The dialect
* @param userFunctions Any application-supplied function definitions
*/
public SQLFunctionRegistry(Dialect dialect, Map userFunctions) {
this.dialect = dialect;
this.userFunctions = new HashMap( userFunctions );
}
/**
* Find a SQLFunction by name
*
* @param functionName The name of the function to locate
*
* @return The located function, maye return {@code null}
*/
public SQLFunction findSQLFunction(String functionName) {
final String name = functionName.toLowerCase();
final SQLFunction userFunction = userFunctions.get( name );
return userFunction != null
? userFunction
: dialect.getFunctions().get( name );
}
/**
* Does this registry contain the named function
*
* @param functionName The name of the function to attempt to locate
*
* @return {@code true} if the registry contained that function
*/
@SuppressWarnings("UnusedDeclaration")
public boolean hasFunction(String functionName) {
final String name = functionName.toLowerCase();
return userFunctions.containsKey( name ) || dialect.getFunctions().containsKey( name );
}
}