/*
* 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.function.formula;
import org.pentaho.reporting.engine.classic.core.function.ReportFormulaContext;
import org.pentaho.reporting.libraries.docbundle.DocumentMetaData;
import org.pentaho.reporting.libraries.formula.EvaluationException;
import org.pentaho.reporting.libraries.formula.FormulaContext;
import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue;
import org.pentaho.reporting.libraries.formula.function.Function;
import org.pentaho.reporting.libraries.formula.function.ParameterCallback;
import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
import org.pentaho.reporting.libraries.formula.typing.coretypes.AnyType;
public class DocumentMetaDataFunction implements Function {
public DocumentMetaDataFunction() {
}
public String getCanonicalName() {
return "DOCUMENTMETADATA";
}
public TypeValuePair evaluate( final FormulaContext context, final ParameterCallback parameters )
throws EvaluationException {
final int parameterCount = parameters.getParameterCount();
if ( parameterCount < 1 || parameterCount > 2 ) {
throw EvaluationException.getInstance( LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE );
}
if ( context instanceof ReportFormulaContext == false ) {
throw EvaluationException.getInstance( LibFormulaErrorValue.ERROR_NA_VALUE );
}
final ReportFormulaContext rfc = (ReportFormulaContext) context;
final DocumentMetaData data = rfc.getProcessingContext().getDocumentMetaData();
if ( parameterCount == 1 ) {
final String metaName =
context.getTypeRegistry().convertToText( parameters.getType( 0 ), parameters.getValue( 0 ) );
final String[] namespaces = data.getMetaDataNamespaces();
for ( int i = 0; i < namespaces.length; i++ ) {
final String namespace = namespaces[i];
final Object attribute = data.getBundleAttribute( namespace, metaName );
if ( attribute != null ) {
return new TypeValuePair( AnyType.TYPE, attribute );
}
}
} else {
final String metaNamespace =
context.getTypeRegistry().convertToText( parameters.getType( 0 ), parameters.getValue( 0 ) );
final String metaName =
context.getTypeRegistry().convertToText( parameters.getType( 1 ), parameters.getValue( 1 ) );
final Object o = data.getBundleAttribute( metaNamespace, metaName );
return new TypeValuePair( AnyType.TYPE, o );
}
throw EvaluationException.getInstance( LibFormulaErrorValue.ERROR_NA_VALUE );
}
}