package org.apache.lucene.search.highlight;
/**
* Copyright 2005 The Apache Software Foundation
*
* 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.
*/
/**
* Simple {@link Encoder} implementation to escape text for HTML output
*
*/
public class SimpleHTMLEncoder implements Encoder
{
public SimpleHTMLEncoder()
{
}
public String encodeText(String originalText)
{
return htmlEncode(originalText);
}
/**
* Encode string into HTML
*/
public final static String htmlEncode(String plainText)
{
if (plainText == null || plainText.length() == 0)
{
return "";
}
StringBuilder result = new StringBuilder(plainText.length());
for (int index=0; index<plainText.length(); index++)
{
char ch = plainText.charAt(index);
switch (ch)
{
case '"':
result.append(""");
break;
case '&':
result.append("&");
break;
case '<':
result.append("<");
break;
case '>':
result.append(">");
break;
default:
if (ch < 128)
{
result.append(ch);
}
else
{
result.append("&#").append((int)ch).append(";");
}
}
}
return result.toString();
}
}