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/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2014 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.engine.fill;
import java.util.ArrayList;
import java.util.List;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.JRSubreportReturnValue;
import net.sf.jasperreports.engine.JRVariable;
import net.sf.jasperreports.engine.ReturnValue;
import net.sf.jasperreports.engine.design.JRDesignSubreportReturnValue;
import net.sf.jasperreports.engine.type.CalculationEnum;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author Lucian Chirita ([email protected])
*/
public class FillReturnValues
{
public static interface SourceContext
{
JRVariable getVariable(String name);
Object getVariableValue(String name);
}
private static final Log log = LogFactory.getLog(FillReturnValues.class);
private final BaseReportFiller filler;
private JRFillSubreportReturnValue[] returnValues;
private JRFillBand band;
public FillReturnValues(JRSubreportReturnValue[] values, JRFillObjectFactory factory, BaseReportFiller filler)
{
this.filler = filler;
if (values != null && values.length > 0)
{
List returnValuesList =
new ArrayList(values.length * 2);
for (JRSubreportReturnValue returnValue : values)
{
JRFillSubreportReturnValue fillReturnValue = factory.getSubreportReturnValue(returnValue);
addReturnValue(fillReturnValue, returnValuesList, factory, filler);
}
returnValues = new JRFillSubreportReturnValue[returnValuesList.size()];
returnValuesList.toArray(returnValues);
}
}
public FillReturnValues(List values, JRFillObjectFactory factory, BaseReportFiller filler)
{
this.filler = filler;
if (values != null && !values.isEmpty())
{
List returnValuesList =
new ArrayList(values.size() * 2);
for (ReturnValue returnValue : values)
{
JRFillSubreportReturnValue fillReturnValue = factory.getReturnValue(returnValue);
addReturnValue(fillReturnValue, returnValuesList, factory, filler);
}
returnValues = new JRFillSubreportReturnValue[returnValuesList.size()];
returnValuesList.toArray(returnValues);
}
}
protected FillReturnValues(FillReturnValues values, JRFillCloneFactory factory)
{
this.filler = values.filler;
this.band = values.band;
if (values.returnValues != null)
{
this.returnValues = new JRFillSubreportReturnValue[values.returnValues.length];
for (int i = 0; i < values.returnValues.length; i++)
{
this.returnValues[i] = new JRFillSubreportReturnValue(values.returnValues[i], factory);
}
}
}
protected JRFillSubreportReturnValue addReturnValue(
JRFillSubreportReturnValue returnValue,
List returnValueList,
JRFillObjectFactory factory, BaseReportFiller filler)
{
CalculationEnum calculation = returnValue.getCalculationValue();
switch (calculation)
{
case AVERAGE:
case VARIANCE:
{
JRSubreportReturnValue countVal = createHelperReturnValue(returnValue, "_COUNT", CalculationEnum.COUNT);
addDerivedReturnValue(countVal, returnValueList, factory, filler);
JRSubreportReturnValue sumVal = createHelperReturnValue(returnValue, "_SUM", CalculationEnum.SUM);
addDerivedReturnValue(sumVal, returnValueList, factory, filler);
filler.addVariableCalculationReq(returnValue.getToVariable(), calculation);
break;
}
case STANDARD_DEVIATION:
{
JRSubreportReturnValue varianceVal = createHelperReturnValue(returnValue, "_VARIANCE", CalculationEnum.VARIANCE);
addDerivedReturnValue(varianceVal, returnValueList, factory, filler);
filler.addVariableCalculationReq(returnValue.getToVariable(), calculation);
break;
}
case DISTINCT_COUNT:
{
JRSubreportReturnValue countVal = createDistinctCountHelperReturnValue(returnValue);
addDerivedReturnValue(countVal, returnValueList, factory, filler);
filler.addVariableCalculationReq(returnValue.getToVariable(), calculation);
break;
}
}
returnValueList.add(returnValue);
return returnValue;
}
protected JRFillSubreportReturnValue addDerivedReturnValue (
JRSubreportReturnValue parentReturnValue,
List returnValueList,
JRFillObjectFactory factory, BaseReportFiller filler
)
{
JRFillSubreportReturnValue returnValue = factory.getSubreportReturnValue(parentReturnValue);
returnValue.setDerived(true);
return addReturnValue(returnValue, returnValueList, factory, filler);
}
protected JRSubreportReturnValue createHelperReturnValue(JRSubreportReturnValue returnValue, String nameSuffix, CalculationEnum calculation)
{
JRDesignSubreportReturnValue helper = new JRDesignSubreportReturnValue();
helper.setToVariable(returnValue.getToVariable() + nameSuffix);
helper.setSubreportVariable(returnValue.getSubreportVariable());
helper.setCalculation(calculation);
helper.setIncrementerFactoryClassName(helper.getIncrementerFactoryClassName());//FIXME shouldn't it be returnValue?
return helper;
}
protected JRSubreportReturnValue createDistinctCountHelperReturnValue(JRSubreportReturnValue returnValue)
{
JRDesignSubreportReturnValue helper = new JRDesignSubreportReturnValue();
helper.setToVariable(returnValue.getToVariable() + "_DISTINCT_COUNT");
helper.setSubreportVariable(returnValue.getSubreportVariable());
helper.setCalculation(CalculationEnum.NOTHING);
helper.setIncrementerFactoryClassName(JRDistinctCountIncrementerFactory.class.getName());
return helper;
}
public void setBand(JRFillBand band)
{
this.band = band;
band.registerReturnValues(this);
}
public void saveReturnVariables()
{
if (log.isDebugEnabled())
{
log.debug("saving return variables on band " + band);
}
if (returnValues != null && band != null)
{
for (int i = 0; i < returnValues.length; i++)
{
String varName = returnValues[i].getToVariable();
band.saveVariable(varName);
}
}
}
public boolean usesForReturnValue(String variableName)
{
boolean used = false;
if (returnValues != null)
{
for (int j = 0; j < returnValues.length; j++)
{
JRSubreportReturnValue returnValue = returnValues[j];
if (returnValue.getToVariable().equals(variableName))
{
if (log.isDebugEnabled())
{
log.debug("variable " + variableName
+ " used for return value of " + returnValue.getSubreportVariable());
}
used = true;
break;
}
}
}
return used;
}
/**
* Copies the values from the source to the variables of the master report.
*/
public void copyValues(SourceContext sourceContext)
{
if (returnValues != null && returnValues.length > 0)
{
for (int i = 0; i < returnValues.length; i++)
{
copyValue(returnValues[i], sourceContext);
}
}
}
protected void copyValue(JRFillSubreportReturnValue returnValue, SourceContext sourceContext)
{
try
{
JRFillVariable variable = filler.getVariable(returnValue.getToVariable());
Object value = sourceContext.getVariableValue(returnValue.getSubreportVariable());
if (log.isTraceEnabled())
{
log.trace("copying value " + value + " of " + returnValue.getSubreportVariable()
+ " to " + returnValue.getToVariable());
}
Object newValue = returnValue.getIncrementer().increment(variable, value, AbstractValueProvider.getCurrentValueProvider());
variable.setOldValue(newValue);
variable.setValue(newValue);
variable.setIncrementedValue(newValue);
}
catch (JRException e)
{
throw new JRRuntimeException(e);
}
}
/**
* Verifies the list of copied values against the subreport.
*
* @throws JRException
*/
public void checkReturnValues(SourceContext sourceContext) throws JRException
{
if (returnValues != null && returnValues.length > 0)
{
for (int i = 0; i < returnValues.length; i++)
{
JRFillSubreportReturnValue returnValue = returnValues[i];
if (returnValue.isDerived())
{
// internally created, not checking
continue;
}
String subreportVariableName = returnValue.getSubreportVariable();
JRVariable subrepVariable = sourceContext.getVariable(subreportVariableName);
if (subrepVariable == null)
{
throw new JRException("Source variable " + subreportVariableName
+ " not found for return value " + returnValue.getToVariable() + ".");
}
JRVariable variable = filler.getVariable(returnValue.getToVariable());
if (
returnValue.getCalculationValue() == CalculationEnum.COUNT
|| returnValue.getCalculationValue() == CalculationEnum.DISTINCT_COUNT
)
{
if (!Number.class.isAssignableFrom(variable.getValueClass()))
{
throw new JRException("Variable " + returnValue.getToVariable() +
" must have a numeric type.");
}
}
else if (!variable.getValueClass().isAssignableFrom(subrepVariable.getValueClass()) &&
!(Number.class.isAssignableFrom(variable.getValueClass()) && Number.class.isAssignableFrom(subrepVariable.getValueClass())))
{
throw new JRException("Variable " + returnValue.getToVariable() +
" is not assignable from source variable " +
subreportVariableName);
}
}
}
}
}
