org.apache.axiom.util.stax.dialect.XLXPInputFactoryWrapper Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.axiom.util.stax.dialect;
import java.io.InputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
class XLXPInputFactoryWrapper extends NormalizingXMLInputFactoryWrapper {
public XLXPInputFactoryWrapper(XMLInputFactory parent, AbstractStAXDialect dialect) {
super(parent, dialect);
}
@Override
public XMLStreamReader createXMLStreamReader(InputStream stream) throws XMLStreamException {
return createXMLStreamReader(null, stream);
}
@Override
public XMLStreamReader createXMLStreamReader(String systemId, InputStream stream)
throws XMLStreamException {
// Both versions of XLXP have issues with documents using UTF-16 without byte
// order markers, although this type of document is explicitly supported by the XML
// specification:
// * XLXP parses the document, XMLStreamReader#getEncoding incorrectly reports
// UTF-8 as the detected encoding.
// * XLXP2 simply fails on UTF-16 documents without BOM.
EncodingDetectionHelper helper = new EncodingDetectionHelper(stream);
stream = helper.getInputStream();
String encoding = helper.detectEncoding();
if (encoding.startsWith("UTF-16")) {
if (systemId == null) {
return super.createXMLStreamReader(stream, encoding);
} else {
// Here we have an issue because it is not possible to specify the
// systemId and the encoding at the same time...
return super.createXMLStreamReader(systemId, stream);
}
} else {
if (systemId == null) {
return super.createXMLStreamReader(stream);
} else {
return super.createXMLStreamReader(systemId, stream);
}
}
}
}