/*
* 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 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.metadata.parser;
import org.pentaho.reporting.engine.classic.core.metadata.AttributeMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.DefaultElementMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ElementMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ElementType;
import org.pentaho.reporting.engine.classic.core.metadata.StyleMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.builder.ElementMetaDataBuilder;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
import org.pentaho.reporting.libraries.xmlns.parser.ParseException;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import java.util.ArrayList;
/**
* @noinspection HardCodedStringLiteral
*/
public class ElementReadHandler extends AbstractMetaDataReadHandler {
private ElementMetaDataBuilder builder;
private ArrayList<StyleReadHandler> styleHandlers;
private ArrayList<AttributeReadHandler> attributeHandlers;
private GlobalMetaDefinition globalMetaDefinition;
public ElementReadHandler( final GlobalMetaDefinition globalMetaDefinition ) {
this.globalMetaDefinition = globalMetaDefinition;
this.attributeHandlers = new ArrayList<AttributeReadHandler>();
this.styleHandlers = new ArrayList<StyleReadHandler>();
this.builder = new ElementMetaDataBuilder();
}
public ElementMetaDataBuilder getBuilder() {
return builder;
}
/**
* Starts parsing.
*
* @param attrs
* the attributes.
* @throws SAXException
* if there is a parsing error.
*/
protected void startParsing( final Attributes attrs ) throws SAXException {
super.startParsing( attrs );
getBuilder().namespace( attrs.getValue( getUri(), "namespace" ) ); // NON-NLS
getBuilder().typeClassification( parseTypeClassification( attrs ) );
getBuilder().elementType( parseElementType( attrs ) );
getBuilder().contentType( parseContentType( attrs ) );
getBuilder().bundle( getBundle(), "element." );
}
private Class<?> parseContentType( final Attributes attrs ) throws ParseException {
final String contentType = attrs.getValue( getUri(), "content-type" );
if ( contentType == null ) {
return Object.class;
} else {
Class<?> aClass = ObjectUtilities.loadAndValidate( contentType, ElementReadHandler.class, Object.class );
if ( aClass == null ) {
return Object.class;
}
return aClass;
}
}
private Class<? extends ElementType> parseElementType( final Attributes attrs ) throws ParseException {
final String elementTypeText = attrs.getValue( getUri(), "implementation" );
if ( elementTypeText == null ) {
throw new ParseException( "Attribute 'implementation' is undefined", getLocator() );
}
Class<? extends ElementType> c =
ObjectUtilities.loadAndValidate( elementTypeText, ElementReadHandler.class, ElementType.class );
if ( c == null ) {
throw new ParseException( "Attribute 'implementation' is not valid", getLocator() );
}
return c;
}
private ElementMetaData.TypeClassification parseTypeClassification( final Attributes attrs ) {
final String eType = attrs.getValue( getUri(), "type-classification" );
if ( "section".equals( eType ) ) {
return ElementMetaData.TypeClassification.SECTION;
} else if ( "data".equals( eType ) ) {
return ElementMetaData.TypeClassification.DATA;
} else if ( "control".equals( eType ) ) {
return ElementMetaData.TypeClassification.CONTROL;
} else if ( "footer".equals( eType ) ) {
return ElementMetaData.TypeClassification.FOOTER;
} else if ( "group-footer".equals( eType ) ) {
return ElementMetaData.TypeClassification.RELATIONAL_FOOTER;
} else if ( "header".equals( eType ) ) {
return ElementMetaData.TypeClassification.HEADER;
} else if ( "group-header".equals( eType ) ) {
return ElementMetaData.TypeClassification.RELATIONAL_HEADER;
} else if ( "subreport".equals( eType ) ) {
return ElementMetaData.TypeClassification.SUBREPORT;
}
if ( "true".equals( attrs.getValue( getUri(), "container" ) ) ) {
return ElementMetaData.TypeClassification.SECTION;
} else {
return ElementMetaData.TypeClassification.DATA;
}
}
/**
* 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 ( getUri().equals( uri ) == false ) {
return null;
}
if ( "attribute-group-ref".equals( tagName ) ) {
return new AttributeGroupRefReadHandler( getBuilder().attributesRef(), globalMetaDefinition );
} else if ( "style-group-ref".equals( tagName ) ) {
return new StyleGroupRefReadHandler( getBuilder().stylesRef(), globalMetaDefinition, getBundle() );
} else if ( "attribute".equals( tagName ) ) {
final String prefix = "element." + getBuilder().getName() + ".";
final AttributeReadHandler readHandler = new AttributeReadHandler( getBundle(), prefix );
attributeHandlers.add( readHandler );
return readHandler;
} else if ( "style".equals( tagName ) ) {
final StyleReadHandler readHandler = new StyleReadHandler( getBundle() );
styleHandlers.add( readHandler );
return readHandler;
}
return null;
}
/**
* Done parsing.
*
* @throws SAXException
* if there is a parsing error.
*/
protected void doneParsing() throws SAXException {
for ( int i = 0; i < attributeHandlers.size(); i++ ) {
final AttributeReadHandler handler = attributeHandlers.get( i );
AttributeMetaData metaData = handler.getMetaData();
getBuilder().attribute( metaData );
}
for ( int i = 0; i < styleHandlers.size(); i++ ) {
final StyleReadHandler handler = styleHandlers.get( i );
StyleMetaData metaData = handler.getMetaData();
getBuilder().style( metaData );
}
}
/**
* 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 DefaultElementMetaData( getBuilder() );
}
}