/*
* 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.extensions.markup.html.basic;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.wicket.util.string.Strings;
/**
* This base implementation iterates over all provided <code>ILinkRenderStrategy</code>
* implementations and applies them to the input text.
*
* @author Gerolf Seitz
*/
public class LinkParser implements ILinkParser
{
private final Map<Pattern, ILinkRenderStrategy> renderStrategies = new HashMap<>();
/**
* Adds a render strategy to the parser.
*
* @param pattern
* the pattern to which the provided <code>renderStrategy</code> should be applied.
* @param renderStrategy
* the <code>ILinkRenderStrategy</code> which is applied to the text found by the
* provided <code>pattern</code>.
* @return this <code>ILinkParser</code>.
*/
public ILinkParser addLinkRenderStrategy(final String pattern,
final ILinkRenderStrategy renderStrategy)
{
final Pattern compiledPattern = Pattern.compile(pattern, Pattern.DOTALL);
renderStrategies.put(compiledPattern, renderStrategy);
return this;
}
/**
* @see ILinkParser#parse(String)
*/
@Override
public String parse(final String text)
{
if (Strings.isEmpty(text))
{
return text;
}
String work = text;
// don't try to parse markup. just plain text. WICKET-4099
if (work.indexOf('<') == -1)
{
for (Map.Entry<Pattern, ILinkRenderStrategy> entry : renderStrategies.entrySet())
{
Pattern pattern = entry.getKey();
ILinkRenderStrategy strategy = entry.getValue();
Matcher matcher = pattern.matcher(work);
StringBuffer buffer = new StringBuffer();
while (matcher.find())
{
String str = matcher.group();
matcher.appendReplacement(buffer, strategy.buildLink(str));
}
matcher.appendTail(buffer);
work = buffer.toString();
}
}
return work;
}
}