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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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* KIND, either express or implied. See the License for the
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package org.apache.cayenne.velocity;
import java.io.IOException;
import java.io.Writer;
import org.apache.cayenne.access.translator.ParameterBinding;
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 NOT NULL". Usage in
* Velocity template is "WHERE SOME_COLUMN #bindNotEqual($xyz)".
*
* @since 1.1
*/
public class BindNotEqualDirective extends BindDirective {
@Override
public String getName() {
return "bindNotEqual";
}
@Override
protected void render(
InternalContextAdapter context,
Writer writer,
ParameterBinding binding) throws IOException {
if (binding.getValue() != null) {
bind(context, binding);
writer.write("<> ?");
}
else {
writer.write("IS NOT NULL");
}
}
}