imagefilter.java

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/*
 * Copyright 2003-2005 the original author or authors.
 * 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 com.jdon.jivejdon.model.message.output.html;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.jdon.jivejdon.model.message.MessageRenderSpecification;
import com.jdon.jivejdon.model.message.MessageVO;

/**
 * A ForumMessageFilter that replaces  to <img src=url></img>
 */

public class ImageFilter implements MessageRenderSpecification {

	public MessageVO render(MessageVO message) {
		message.setBody(convertTags(message.getBody()));
		return message;
	}

	private String convertTags(String str) {
		if (str == null || str.length() == 0) {
			return str;
		}
		String patt = "(\\[img\\])([^\\[]+)(\\[/img\\])";
		Pattern p = Pattern.compile(patt);
		Matcher m = p.matcher(str);
		StringBuffer sb = new StringBuffer();
		int i = 0;
		boolean result = m.find();
		while (result) {
			i++;
			m.appendReplacement(sb, "<img src=\"" + m.group(2) + "\" border='0' >");
			result = m.find();
		}
		m.appendTail(sb);
		return sb.toString();
	}

}