org.apache.tapestry5.corelib.components.If Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of tapestry-core Show documentation
Show all versions of tapestry-core Show documentation
Central module for Tapestry, containing interfaces to the Java
Servlet API and all core services and components.
// Copyright 2006, 2007 The Apache Software Foundation
//
// Licensed 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.tapestry5.corelib.components;
import org.apache.tapestry5.annotations.Parameter;
import org.apache.tapestry5.corelib.base.AbstractConditional;
/**
* Conditionally renders its body. May render its tag and any informal parameters.
*/
public class If extends AbstractConditional
{
/**
* If true, then the body of the If component is rendered. If false, the body is omitted.
*/
@Parameter(required = true)
private boolean test;
/**
* Optional parameter to invert the test. If true, then the body is rendered when the test parameter is false (not
* true).
*
* @see Unless
*/
@Parameter
private boolean negate;
/**
* @return test parameter (if negate is false), or test parameter inverted (if negate is true)
*/
protected boolean test()
{
return test != negate;
}
}