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WW-2776 - Uses JRRewindableDataSource for JasperReports

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git-svn-id: https://svn.apache.org/repos/asf/struts/struts2/trunk@1127396 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Lukasz Lenart
2011-05-25 06:35:44 +00:00
parent bc0ac267f6
commit b40ef08d31
1 changed files with 38 additions and 16 deletions
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plugins/jasperreports/src/main/java/org/apache/struts2/views/jasperreports/ValueStackDataSource.java
+38 -16
View File
@@ -21,23 +21,20 @@
package org.apache.struts2.views.jasperreports;
import java.util.Iterator;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRField;
import org.apache.struts2.util.MakeIterator;
import com.opensymphony.xwork2.util.ValueStack;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRField;
import net.sf.jasperreports.engine.JRRewindableDataSource;
import org.apache.struts2.util.MakeIterator;
import java.util.Iterator;
/**
* Ported to Struts.
*
*/
public class ValueStackDataSource implements JRDataSource {
public class ValueStackDataSource implements JRRewindableDataSource {
/**
* Logger for this class
@@ -47,18 +44,20 @@ public class ValueStackDataSource implements JRDataSource {
Iterator iterator;
ValueStack valueStack;
String dataSource;
boolean firstTimeThrough = true;
/**
* Create a value stack data source on the given iterable property
*
* @param valueStack The value stack to base the data source on
* @param dataSource The property to iterate over for the report
* @param valueStack The value stack to base the data source on
* @param dataSourceParam The property to iterate over for the report
*/
public ValueStackDataSource(ValueStack valueStack, String dataSource) {
public ValueStackDataSource(ValueStack valueStack, String dataSourceParam) {
this.valueStack = valueStack;
dataSource = dataSourceParam;
Object dataSourceValue = valueStack.findValue(dataSource);
if (dataSourceValue != null) {
@@ -71,7 +70,7 @@ public class ValueStackDataSource implements JRDataSource {
}
} else {
if (LOG.isWarnEnabled()) {
LOG.warn("Data source value for data source " + dataSource + " was null");
LOG.warn("Data source value for data source " + dataSource + " was null");
}
}
}
@@ -113,6 +112,29 @@ public class ValueStackDataSource implements JRDataSource {
}
}
/**
* Move to the first item.
*
* @throws JRException if there is a problem with moving to the first
* data element
*/
public void moveFirst() throws JRException {
Object dataSourceValue = valueStack.findValue(dataSource);
if (dataSourceValue != null) {
if (MakeIterator.isIterable(dataSourceValue)) {
iterator = MakeIterator.convert(dataSourceValue);
} else {
Object[] array = new Object[1];
array[0] = dataSourceValue;
iterator = MakeIterator.convert(array);
}
} else {
if (LOG.isWarnEnabled()) {
LOG.warn("Data source value for data source [" + dataSource + "] was null");
}
}
}
/**
* Is there any more data
*
@@ -131,13 +153,13 @@ public class ValueStackDataSource implements JRDataSource {
if ((iterator != null) && (iterator.hasNext())) {
valueStack.push(iterator.next());
if (LOG.isDebugEnabled()) {
LOG.debug("Pushed next value: " + valueStack.findValue("."));
LOG.debug("Pushed next value: " + valueStack.findValue("."));
}
return true;
} else {
if (LOG.isDebugEnabled()) {
LOG.debug("No more values");
LOG.debug("No more values");
}
return false;