org.apache.wicket.util.parse.metapattern.OptionalMetaPattern Maven / Gradle / Ivy
/*
* 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.wicket.util.parse.metapattern;
import java.util.List;
/**
* Makes any MetaPattern optional by enclosing the pattern in an optionality expression. The
* expression will be something equivalent to "(?:<pattern>)?".
*
* @author Jonathan Locke
*/
public final class OptionalMetaPattern extends MetaPattern
{
private static final long serialVersionUID = 1L;
/**
* Constructor
*
* @param pattern
*/
public OptionalMetaPattern(final String pattern)
{
super(pattern);
}
/**
* Constructor
*
* @param pattern
* MetaPattern to make optional
*/
public OptionalMetaPattern(final MetaPattern pattern)
{
super(pattern);
}
/**
* Constructor
*
* @param patterns
*/
public OptionalMetaPattern(final List patterns)
{
super(patterns);
}
/**
* Constructor
*
* @param patterns
*/
public OptionalMetaPattern(final MetaPattern[] patterns)
{
super(patterns);
}
/**
* @return String representation of this pattern
*/
@Override
public String toString()
{
return "(?:" + super.toString() + ")?";
}
}