/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. 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. For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.abdera.parser.stax.util;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
import org.apache.abdera.i18n.text.io.CharsetSniffingInputStream;
import org.apache.abdera.i18n.text.io.PeekAheadInputStream;
/**
* Will attempt to autodetect the character encoding from the stream
* This will preserve the BOM if it exists.
*/
public class FOMSniffingInputStream
extends CharsetSniffingInputStream {
public FOMSniffingInputStream(InputStream in) {
super(in);
}
protected String detectEncoding() throws IOException {
String charset = super.detectEncoding();
PeekAheadInputStream pin = getInternal();
try {
byte[] p = new byte[200];
pin.peek(p);
XMLStreamReader xmlreader =
XMLInputFactory.newInstance().createXMLStreamReader(
new java.io.ByteArrayInputStream(p));
String cs = xmlreader.getCharacterEncodingScheme();
if (cs != null) charset = cs;
} catch (Exception e) {}
return charset;
}
}