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The private implementation classes of the Apache MyFaces Core JSF-2.3 Implementation
/*
* 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.myfaces.shared.renderkit.html.util;
import java.io.IOException;
import java.io.Writer;
/**
* Converts characters outside of latin-1 set in a string to numeric character references.
*
*/
public abstract class UnicodeEncoder
{
/**
* Encodes the given string, so that it can be used within a html page.
* @param string the string to convert
*/
public static String encode (String string)
{
if (string == null)
{
return "";
}
StringBuilder sb = null;
char c;
for (int i = 0; i < string.length (); ++i)
{
c = string.charAt(i);
if (((int)c) >= 0x80)
{
if( sb == null )
{
sb = new StringBuilder( string.length()+4 );
sb.append( string.substring(0,i) );
}
//encode all non basic latin characters
sb.append("");
sb.append((int)c);
sb.append(";");
}
else if( sb != null )
{
sb.append(c);
}
}
return sb != null ? sb.toString() : string;
}
public static void encode (Writer writer, String string) throws IOException
{
if (string == null)
{
return;
}
int start = 0;
char c;
for (int i = 0; i < string.length (); ++i)
{
c = string.charAt(i);
if (((int)c) >= 0x80)
{
if (start < i)
{
writer.write(string, start, i-start);
}
start = i+1;
//encode all non basic latin characters
writer.write("");
writer.write(Integer.toString((int)c));
writer.write(";");
}
}
if (start == 0)
{
writer.write(string);
}
else if (start < string.length())
{
writer.write(string,start,string.length()-start);
}
}
public static void encode (Writer writer, char[] cbuf, int off, int len) throws IOException
{
if (cbuf == null)
{
return;
}
int start = off;
char c;
for (int i = off; i < off+len; ++i)
{
c = cbuf[i];
if (((int)c) >= 0x80)
{
if (start < i)
{
writer.write(cbuf, start, i-start);
}
start = i+1;
//encode all non basic latin characters
writer.write("");
writer.write(Integer.toString((int)c));
writer.write(";");
}
}
if (start == off)
{
writer.write(cbuf, off, len);
}
else if (start < off+len)
{
writer.write(cbuf,start,off+len-start);
}
}
public static void encode (Writer writer, String cbuf, int off, int len) throws IOException
{
if (cbuf == null)
{
return;
}
int start = off;
char c;
for (int i = off; i < off+len; ++i)
{
c = cbuf.charAt(i);
if (((int)c) >= 0x80)
{
if (start < i)
{
writer.write(cbuf, start, i-start);
}
start = i+1;
//encode all non basic latin characters
writer.write("");
writer.write(Integer.toString((int)c));
writer.write(";");
}
}
if (start == off)
{
writer.write(cbuf, off, len);
}
else if (start < off+len)
{
writer.write(cbuf,start,off+len-start);
}
}
}