/* Copyright (c) 2008 Google Inc.
*
* 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.google.gdata.wireformats;
import com.google.gdata.util.io.base.UnicodeReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.nio.charset.Charset;
/**
* Utility functions shared across parser implementations.
*/
public abstract class ParserUtils {
/**
* This class is not meant to be instantiated.
*/
private ParserUtils() {}
/**
* Returns a reader based upon the character set (encoding).
* Use the special UnicodeReader class for Unicode encodings, to work
* around a JDK bug related to Unicode byte order markings.
*
* @param input content to parse
* @param cs character set (encoding) used by content
* @return reader
* @throws IOException if specified encoding cannot be used
*/
public static Reader getInputReader(InputStream input, Charset cs)
throws IOException {
if (cs.name().toLowerCase().startsWith("utf-")) {
return new UnicodeReader(input, cs.name());
}
return new InputStreamReader(input, cs);
}
}