/*
* 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.markup.html.image.resource;
import java.util.Locale;
import org.apache.wicket.IResourceFactory;
import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.request.resource.IResource;
import org.apache.wicket.util.parse.metapattern.Group;
import org.apache.wicket.util.parse.metapattern.IntegerGroup;
import org.apache.wicket.util.parse.metapattern.MetaPattern;
import org.apache.wicket.util.parse.metapattern.OptionalMetaPattern;
import org.apache.wicket.util.parse.metapattern.parsers.MetaPatternParser;
/**
* A factory which creates default button images.
*
* @author Jonathan Locke
*/
public class DefaultButtonImageResourceFactory implements IResourceFactory
{
/**
*
* @see org.apache.wicket.IResourceFactory#newResource(java.lang.String, java.util.Locale,
* java.lang.String, java.lang.String)
*/
@Override
public IResource newResource(final String specification, final Locale locale,
final String style, final String variation)
{
final Parser parser = new Parser(specification);
if (parser.matches())
{
return new DefaultButtonImageResource(parser.getWidth(), parser.getHeight(),
parser.getLabel());
}
else
{
throw new WicketRuntimeException(
"DefaultButtonImageResourceFactory does not recognized the specification " +
specification);
}
}
/**
* Parses image value specifications.
*
* @author Jonathan Locke
*/
private static final class Parser extends MetaPatternParser
{
/** Group value. */
private static final IntegerGroup width = new IntegerGroup();
/** Group value. */
private static final IntegerGroup height = new IntegerGroup();
/** Label */
private static final Group label = new Group(MetaPattern.ANYTHING);
/** Meta pattern. */
private static final MetaPattern pattern = new MetaPattern(
new OptionalMetaPattern(
new MetaPattern[] { width, MetaPattern.COMMA, height, MetaPattern.COLON }), label);
/**
* Construct.
*
* @param input
* to parse
*/
public Parser(final CharSequence input)
{
super(pattern, input);
}
/**
* @return The label
*/
public String getLabel()
{
return label.get(matcher());
}
/**
* @return Any width
*/
public int getWidth()
{
return width.getInt(matcher(), -1);
}
/**
* @return Any height
*/
public int getHeight()
{
return height.getInt(matcher(), -1);
}
}
}