org.apache.cayenne.access.jdbc.BindEqualDirective Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cayenne-client-nodeps
Show all versions of cayenne-client-nodeps
Cayenne Object Persistence Framework
/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
****************************************************************/
package org.apache.cayenne.access.jdbc;
import java.io.IOException;
import java.io.Writer;
import org.apache.velocity.context.InternalContextAdapter;
/**
* A custom Velocity directive to create a PreparedStatement parameter text
* for "= ?". If null value is encountered, generated text will look like "IS NULL".
* Usage in Velocity template is "WHERE SOME_COLUMN #bindEqual($xyz)".
*
* @since 1.1
* @author Andrei Adamchik
*/
public class BindEqualDirective extends BindDirective {
public String getName() {
return "bindEqual";
}
protected void render(
InternalContextAdapter context,
Writer writer,
ParameterBinding binding)
throws IOException {
if (binding.getValue() != null) {
bind(context, binding);
writer.write("= ?");
}
else {
writer.write("IS NULL");
}
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy