/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.core.types;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Writer;
import java.nio.charset.Charset;
import java.sql.SQLException;
import java.sql.SQLXML;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stax.StAXSource;
import javax.xml.transform.stream.StreamSource;
import org.teiid.core.util.ObjectConverterUtil;
import org.teiid.core.util.SqlUtil;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* Default SQLXML impl
*
* NOTE that this representation of XML does not become unreadable after
* read operations.
*/
public class SQLXMLImpl extends BaseLob implements SQLXML {
public SQLXMLImpl() {
}
/**
* Constructs a SQLXML from bytes that are already encoded in {@link Streamable#ENCODING}
* @param bytes
*/
public SQLXMLImpl(final byte[] bytes) {
super(new InputStreamFactory() {
@Override
public InputStream getInputStream() throws IOException {
return new ByteArrayInputStream(bytes);
}
});
setEncoding(Streamable.ENCODING);
}
public SQLXMLImpl(final String str) {
this(str.getBytes(Charset.forName(Streamable.ENCODING)));
}
public SQLXMLImpl(InputStreamFactory factory) {
super(factory);
}
@Override
public Charset getCharset() {
Charset cs = super.getCharset();
if (cs != null) {
return cs;
}
String enc = null;
try {
enc = XMLType.getEncoding(this.getBinaryStream());
} catch (SQLException e) {
}
if (enc != null) {
setEncoding(enc);
} else {
super.setCharset(Streamable.CHARSET);
}
return super.getCharset();
}
@SuppressWarnings("unchecked")
public <T extends Source> T getSource(Class<T> sourceClass) throws SQLException {
if (sourceClass == null || sourceClass == StreamSource.class) {
return (T)new StreamSource(getBinaryStream(), this.getStreamFactory().getSystemId());
} else if (sourceClass == StAXSource.class) {
XMLInputFactory factory = XMLInputFactory.newInstance();
try {
return (T) new StAXSource(factory.createXMLStreamReader(getBinaryStream()));
} catch (XMLStreamException e) {
throw new SQLException(e);
}
} else if (sourceClass == SAXSource.class) {
return (T) new SAXSource(new InputSource(getBinaryStream()));
} else if (sourceClass == DOMSource.class) {
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder docBuilder = dbf.newDocumentBuilder();
Node doc = docBuilder.parse(new InputSource(getBinaryStream()));
return (T) new DOMSource(doc);
} catch (ParserConfigurationException e) {
throw new SQLException(e);
} catch (SAXException e) {
throw new SQLException(e);
} catch (IOException e) {
throw new SQLException(e);
}
}
throw new SQLException("Unsupported source type " + sourceClass); //$NON-NLS-1$
}
public String getString() throws SQLException {
try {
return ObjectConverterUtil.convertToString(getCharacterStream());
} catch (IOException e) {
SQLException ex = new SQLException(e.getMessage());
ex.initCause(e);
throw ex;
}
}
public OutputStream setBinaryStream() throws SQLException {
throw SqlUtil.createFeatureNotSupportedException();
}
public Writer setCharacterStream() throws SQLException {
throw SqlUtil.createFeatureNotSupportedException();
}
public void setString(String value) throws SQLException {
throw SqlUtil.createFeatureNotSupportedException();
}
public <T extends Result> T setResult(Class<T> resultClass)
throws SQLException {
throw SqlUtil.createFeatureNotSupportedException();
}
}