/*
* 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) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.metadata.parser;
import java.beans.BeanInfo;
import java.beans.PropertyDescriptor;
import org.pentaho.reporting.engine.classic.core.metadata.DefaultExpressionPropertyCore;
import org.pentaho.reporting.engine.classic.core.metadata.DefaultExpressionPropertyMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ExpressionPropertyCore;
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.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class ExpressionPropertyReadHandler extends AbstractXmlReadHandler
{
private String name;
private boolean preferred;
private boolean mandatory;
private boolean expert;
private boolean hidden;
private String valueRole;
private boolean deprecated;
private BeanInfo expression;
private String bundleLocation;
private String prefix;
private PropertyDescriptor descriptor;
private String propertyEditorClass;
private boolean computed;
private ExpressionPropertyCore expressionPropertyCore;
public ExpressionPropertyReadHandler(final BeanInfo expression,
final String bundleLocation,
final String prefix)
{
this.expression = expression;
this.bundleLocation = bundleLocation;
this.prefix = prefix;
}
/**
* Starts parsing.
*
* @param attrs the attributes.
* @throws 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("Attribute 'name' is undefined", getLocator());
}
mandatory = "true".equals(attrs.getValue(getUri(), "mandatory")); // NON-NLS
expert = "true".equals(attrs.getValue(getUri(), "expert")); // NON-NLS
hidden = "true".equals(attrs.getValue(getUri(), "hidden")); // NON-NLS
preferred = "true".equals(attrs.getValue(getUri(), "preferred")); // NON-NLS
deprecated = "true".equals(attrs.getValue(getUri(), "deprecated")); // NON-NLS
computed = "true".equals(attrs.getValue(getUri(), "computed")); // NON-NLS
valueRole = attrs.getValue(getUri(), "value-role"); // NON-NLS
if (valueRole == null)
{
valueRole = "Value"; // NON-NLS
}
propertyEditorClass = attrs.getValue(getUri(), "propertyEditor"); // NON-NLS
final PropertyDescriptor[] descriptors = expression.getPropertyDescriptors();
for (int i = 0; i < descriptors.length; i++)
{
final PropertyDescriptor maybeDescriptor = descriptors[i];
if (name.equals(maybeDescriptor.getName()))
{
descriptor = maybeDescriptor;
break;
}
}
if (descriptor == null)
{
throw new ParseException("Attribute 'name' with value '" + name + "' does not reference a valid property. ["
+ expression.getBeanDescriptor().getBeanClass() + "]", getLocator());
}
final String metaDataCoreClass = attrs.getValue(getUri(), "impl"); // NON-NLS
if (metaDataCoreClass != null)
{
expressionPropertyCore = (ExpressionPropertyCore) ObjectUtilities.loadAndInstantiate
(metaDataCoreClass, ExpressionPropertyReadHandler.class, ExpressionPropertyCore.class);
if (expressionPropertyCore == null)
{
throw new ParseException("Attribute 'impl' references a invalid ExpressionPropertyCore implementation.", getLocator());
}
}
else
{
expressionPropertyCore = new DefaultExpressionPropertyCore();
}
}
public String getName()
{
return name;
}
public boolean isPreferred()
{
return preferred;
}
public boolean isMandatory()
{
return mandatory;
}
public boolean isExpert()
{
return expert;
}
public boolean isDeprecated()
{
return deprecated;
}
public boolean isHidden()
{
return hidden;
}
public String getValueRole()
{
return valueRole;
}
/**
* 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 new DefaultExpressionPropertyMetaData
(name, bundleLocation, prefix, expert, preferred, hidden, deprecated, mandatory,
computed, valueRole, descriptor, propertyEditorClass, expressionPropertyCore);
}
}