de.laures.cewolf.taglib
Class DataContainer
java.lang.Object
de.laures.cewolf.taglib.DataContainer
- All Implemented Interfaces:
- DataAware, java.io.Serializable
public class DataContainer
- extends java.lang.Object
- implements DataAware, java.io.Serializable
- Author:
- guido
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- See Also:
- Serialized Form
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
log
private static final transient org.apache.commons.logging.Log log
data
private transient org.jfree.data.general.Dataset data
producer
private transient DatasetProducer producer
datasetProductionParams
private java.util.Map datasetProductionParams
datasetProduceTime
private long datasetProduceTime
useCache
private boolean useCache
DataContainer
public DataContainer()
setDataProductionConfig
public void setDataProductionConfig(DatasetProducer dsp,
java.util.Map params,
boolean useCache)
- Specified by:
setDataProductionConfig
in interface DataAware
getDataset
public java.lang.Object getDataset()
throws DatasetProduceException
- Throws:
DatasetProduceException
checkDataProductionNeed
private void checkDataProductionNeed()
- This method checks if there has been a dataset production
for the same DatasetProvider and parameters. If so the DatasetProducer
is consulted to check the expiry of this data.
If the data has expired the retrieval of a cached image of this
ChartDefinition is avoided by setting the datasetProduceTime to the
actual time. After this the hash code of this object can not be
present in the image cache and so a new image with new data will
be rendered.
If the data did not expire the last dataset production time is stored
as a memeber to reach the same hash code for this object as the one
before if possible.
This method is called during serialization to ensure the same serialized
representation of this and a eventually formally stored object.