XmlProducer.java
- /*
- *
- * The DbUnit Database Testing Framework
- * Copyright (C)2002-2004, DbUnit.org
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
- package org.dbunit.dataset.xml;
- import java.io.IOException;
- import java.io.InputStream;
- import java.util.LinkedList;
- import java.util.List;
- import javax.xml.parsers.ParserConfigurationException;
- import javax.xml.parsers.SAXParserFactory;
- import org.dbunit.dataset.Column;
- import org.dbunit.dataset.DataSetException;
- import org.dbunit.dataset.DefaultTableMetaData;
- import org.dbunit.dataset.ITable;
- import org.dbunit.dataset.ITableMetaData;
- import org.dbunit.dataset.datatype.DataType;
- import org.dbunit.dataset.stream.DefaultConsumer;
- import org.dbunit.dataset.stream.IDataSetConsumer;
- import org.dbunit.dataset.stream.IDataSetProducer;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
- import org.xml.sax.Attributes;
- import org.xml.sax.ContentHandler;
- import org.xml.sax.ErrorHandler;
- import org.xml.sax.InputSource;
- import org.xml.sax.SAXException;
- import org.xml.sax.SAXParseException;
- import org.xml.sax.XMLReader;
- import org.xml.sax.helpers.DefaultHandler;
- /**
- * Parses an XML and produces a dataset from it.
- *
- * @author Manuel Laflamme
- * @author Last changed by: $Author$
- * @version $Revision$ $Date$
- * @since Apr 30, 2003
- */
- public class XmlProducer extends DefaultHandler
- implements IDataSetProducer, ContentHandler, ErrorHandler
- {
- /**
- * Logger for this class
- */
- private static final Logger logger = LoggerFactory.getLogger(XmlProducer.class);
- private static final IDataSetConsumer EMPTY_CONSUMER = new DefaultConsumer();
- private static final String DATASET = "dataset";
- private static final String TABLE = "table";
- private static final String NAME = "name";
- private static final String COLUMN = "column";
- private static final String ROW = "row";
- private static final String VALUE = "value";
- private static final String NULL = "null";
- private static final String NONE = "none";
- private final InputSource _inputSource;
- private boolean _validating = false;
- private IDataSetConsumer _consumer = EMPTY_CONSUMER;
- private String _activeTableName;
- private ITableMetaData _activeMetaData;
- private List _activeColumnNames;
- private StringBuilder _activeCharacters;
- private List _activeRowValues;
- public XmlProducer(InputSource inputSource)
- {
- _inputSource = inputSource;
- }
- private ITableMetaData createMetaData(String tableName, List columnNames)
- {
- logger.debug("createMetaData(tableName={}, _columnNames={}) - start", tableName, columnNames);
- Column[] columns = new Column[columnNames.size()];
- for (int i = 0; i < columns.length; i++)
- {
- String columnName = (String)columnNames.get(i);
- columns[i] = new Column(columnName, DataType.UNKNOWN);
- }
- DefaultTableMetaData metaData = new DefaultTableMetaData(tableName, columns);
- return metaData;
- }
- public void setValidating(boolean validating)
- {
- _validating = validating;
- }
- ////////////////////////////////////////////////////////////////////////////
- // IDataSetProducer interface
- public void setConsumer(IDataSetConsumer consumer) throws DataSetException
- {
- logger.debug("setConsumer(consumer={}) - start", consumer);
- _consumer = consumer;
- }
- public void produce() throws DataSetException
- {
- logger.debug("produce() - start");
- try
- {
- SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
- saxParserFactory.setValidating(_validating);
- XMLReader xmlReader = saxParserFactory.newSAXParser().getXMLReader();
- xmlReader.setContentHandler(this);
- xmlReader.setEntityResolver(this);
- xmlReader.setErrorHandler(this);
- xmlReader.parse(_inputSource);
- }
- catch (ParserConfigurationException e)
- {
- throw new DataSetException(e);
- }
- catch (SAXException e)
- {
- DataSetException exceptionToRethrow = XmlProducer.buildException(e);
- throw exceptionToRethrow;
- }
- catch (IOException e)
- {
- throw new DataSetException(e);
- }
- }
- /**
- * Wraps a {@link SAXException} into a {@link DataSetException}
- * @param cause The cause to be wrapped into a {@link DataSetException}
- * @return A {@link DataSetException} that wraps the given {@link SAXException}
- */
- protected final static DataSetException buildException(SAXException cause)
- {
- int lineNumber = -1;
- if (cause instanceof SAXParseException)
- {
- lineNumber = ((SAXParseException)cause).getLineNumber();
- }
- Exception exception = cause.getException() == null ? cause : cause.getException();
- String message;
-
- if (lineNumber >= 0)
- {
- message = "Line " + lineNumber + ": " + exception.getMessage();
- }
- else {
- message = exception.getMessage();
- }
- if(exception instanceof DataSetException) {
- return (DataSetException) exception;
- }
- else {
- return new DataSetException(message, exception);
- }
- }
- ////////////////////////////////////////////////////////////////////////////
- // EntityResolver interface
- public InputSource resolveEntity(String publicId, String systemId)
- throws SAXException
- {
- logger.debug("resolveEntity(publicId={}, systemId={}) - start", publicId, systemId);
- InputStream in = getClass().getClassLoader().getResourceAsStream(
- "org/dbunit/dataset/xml/dataset.dtd");
- return (new InputSource(in));
- }
- ////////////////////////////////////////////////////////////////////////
- // ContentHandler interface
- public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException
- {
- logger.debug("startElement(uri={}, localName={}, qName={}, attributes={}) - start",
- uri, localName, qName, attributes);
- try
- {
- // dataset
- if (qName.equals(DATASET))
- {
- _consumer.startDataSet();
- return;
- }
- // table
- if (qName.equals(TABLE))
- {
- _activeTableName = attributes.getValue(NAME);
- _activeColumnNames = new LinkedList();
- return;
- }
- // column
- if (qName.equals(COLUMN))
- {
- _activeCharacters = new StringBuilder();
- return;
- }
- // row
- if (qName.equals(ROW))
- {
- // End of metadata at first row
- if (_activeColumnNames != null)
- {
- _activeMetaData = createMetaData(_activeTableName,_activeColumnNames);
- _consumer.startTable(_activeMetaData);
- _activeColumnNames = null;
- }
- _activeRowValues = new LinkedList();
- return;
- }
- // value
- if (qName.equals(VALUE))
- {
- _activeCharacters = new StringBuilder();
- return;
- }
- // null
- if (qName.equals(NULL))
- {
- _activeRowValues.add(null);
- return;
- }
- // none
- if (qName.equals(NONE))
- {
- _activeRowValues.add(ITable.NO_VALUE);
- return;
- }
- }
- catch (DataSetException e)
- {
- throw new SAXException(e);
- }
- }
- public void endElement(String uri, String localName, String qName) throws SAXException
- {
- logger.debug("endElement(uri={}, localName={}, qName={}) - start", uri, localName, qName);
- try
- {
- // dataset
- if (qName.equals(DATASET))
- {
- _consumer.endDataSet();
- return;
- }
- // table
- if (qName.equals(TABLE))
- {
- // End of metadata
- if (_activeColumnNames != null)
- {
- _activeMetaData = createMetaData(_activeTableName, _activeColumnNames);
- _consumer.startTable(_activeMetaData);
- _activeColumnNames = null;
- }
- _consumer.endTable();
- _activeTableName = null;
- _activeMetaData = null;
- return;
- }
- // column
- if (qName.equals(COLUMN))
- {
- _activeColumnNames.add(_activeCharacters.toString());
- _activeCharacters = null;
- return;
- }
- // row
- if (qName.equals(ROW))
- {
- final int length = Math.max(_activeRowValues.size(), _activeMetaData.getColumns().length);
- Object[] values = new Object[length];
- for (int i = 0; i < values.length; i++)
- {
- values[i] = (i >= _activeRowValues.size()) ? ITable.NO_VALUE : _activeRowValues.get(i);
- }
- _consumer.row(values);
- _activeRowValues = null;
- return;
- }
- // value
- if (qName.equals(VALUE))
- {
- _activeRowValues.add(_activeCharacters.toString());
- _activeCharacters = null;
- return;
- }
- // null
- if (qName.equals(NULL))
- {
- // Nothing to do, already processed in startElement()
- return;
- }
- // none
- if (qName.equals(NONE))
- {
- // Nothing to do, already processed in startElement()
- return;
- }
- }
- catch (DataSetException e)
- {
- throw new SAXException(e);
- }
- }
- public void characters(char ch[], int start, int length)
- throws SAXException
- {
- if (_activeCharacters != null)
- {
- _activeCharacters.append(ch, start, length);
- }
- }
- ////////////////////////////////////////////////////////////////////////////
- // ErrorHandler interface
- // public void warning(SAXParseException e)
- // throws SAXException
- // {
- // throw e;
- // }
- public void error(SAXParseException e)
- throws SAXException
- {
- throw e;
- }
- // public void fatalError(SAXParseException e)
- // throws SAXException
- // {
- // throw e;
- // }
- }