/*
* 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.core.util.resource.locator;
import java.util.Iterator;
/**
* Iterate over all possible combinations of style and variation
*
* @author Juergen Donnerstag
*/
public class StyleAndVariationResourceNameIterator implements Iterator<String>
{
/** The style (see Session) */
private final String style;
/** The variation (see Component) */
private final String variation;
/** Internal state */
private int state = 0;
/**
* Construct.
*
* @param style
* @param variation
*/
public StyleAndVariationResourceNameIterator(final String style, final String variation)
{
this.style = style;
this.variation = variation;
}
/**
*
* @see java.util.Iterator#hasNext()
*/
@Override
public boolean hasNext()
{
return (state < 4);
}
/**
* The return value will always be null. Use getStyle() and getVariation() instead.
*
* @see java.util.Iterator#next()
*/
@Override
public String next()
{
if (state == 0)
{
state++;
if ((style != null) && (variation != null))
{
return null;
}
}
if (state == 1)
{
state++;
if (style != null)
{
return null;
}
}
if (state == 2)
{
state++;
if (variation != null)
{
return null;
}
}
state = 4;
return null;
}
/**
* @return Gets the style related to the iterator state
*/
public final String getStyle()
{
return ((state == 1) || (state == 2)) ? style : null;
}
/**
* @return Gets the variation related to the iterator state
*/
public final String getVariation()
{
return ((state == 1) || (state == 3)) ? variation : null;
}
/**
*
* @see java.util.Iterator#remove()
*/
@Override
public void remove()
{
}
}