/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.modules.parser.data.sequence;
import java.util.ArrayList;
import org.pentaho.reporting.engine.classic.core.modules.misc.datafactory.sequence.Sequence;
import org.pentaho.reporting.engine.classic.core.modules.misc.datafactory.sequence.SequenceDescription;
import org.pentaho.reporting.engine.classic.core.util.beans.BeanException;
import org.pentaho.reporting.engine.classic.core.util.beans.ConverterRegistry;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.ParseException;
import org.pentaho.reporting.libraries.xmlns.parser.PropertyReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class SequenceReadHandler extends AbstractXmlReadHandler
{
private String name;
private Sequence data;
private ArrayList<PropertyReadHandler> properties;
public SequenceReadHandler()
{
properties = new ArrayList<PropertyReadHandler>();
}
/**
* Starts parsing.
*
* @param attrs the attributes.
* @throws org.xml.sax.SAXException if there is a parsing error.
*/
protected void startParsing(final Attributes attrs) throws SAXException
{
name = attrs.getValue(getUri(), "name");
if (name == null)
{
throw new ParseException("Required attribute 'name' is not defined.", getLocator());
}
final String sequenceClass = attrs.getValue(getUri(), "class");
final Sequence sequence = ObjectUtilities.loadAndInstantiate(sequenceClass, SequenceReadHandler.class, Sequence.class);
if (sequence == null)
{
throw new ParseException("Required attribute 'class' is invalid.", getLocator());
}
this.data = sequence;
}
/**
* Returns the handler for a child element.
*
* @param uri the URI of the namespace of the current element.
* @param tagName the tag name.
* @param atts the attributes.
* @return the handler or null, if the tagname is invalid.
* @throws SAXException if there is a parsing error.
*/
protected XmlReadHandler getHandlerForChild(final String uri,
final String tagName,
final Attributes atts) throws SAXException
{
if (isSameNamespace(uri) == false)
{
return null;
}
if ("property".equals(tagName))
{
final PropertyReadHandler definitionReadHandler = new PropertyReadHandler();
properties.add(definitionReadHandler);
return definitionReadHandler;
}
return null;
}
public Sequence getData()
{
return data;
}
public String getName()
{
return name;
}
/**
* Done parsing.
*
* @throws SAXException if there is a parsing error.
*/
protected void doneParsing() throws SAXException
{
final SequenceDescription sequenceDescription = data.getSequenceDescription();
for (final PropertyReadHandler propertyReadHandler : properties)
{
final String propertyName = propertyReadHandler.getName();
final String propertyValue = propertyReadHandler.getResult();
final int pos = getPropertyLocation(sequenceDescription, propertyName);
if (pos == -1)
{
throw new ParseException
("Unable to set property " + propertyName + ". There is no such property.", getLocator());
}
final Class ptype = sequenceDescription.getParameterType(pos);
try
{
final Object o = ConverterRegistry.toPropertyValue(propertyValue, ptype);
data.setParameter(propertyName, o);
}
catch (BeanException e)
{
throw new ParseException
("Unable to set property " + propertyName + ". Conversion error.", e, getLocator());
}
}
}
private int getPropertyLocation(final SequenceDescription sequenceDescription,
final String name)
{
final int parameterCount = sequenceDescription.getParameterCount();
for (int i = 0; i < parameterCount; i++)
{
if (name.equals(sequenceDescription.getParameterName(i)))
{
return i;
}
}
return -1;
}
/**
* Returns the object for this element or null, if this element does not create an object.
*
* @return the object.
* @throws SAXException if an parser error occured.
*/
public Object getObject() throws SAXException
{
return data;
}
}