| java.lang.Object
 org.continuent.sequoia.controller.cache.metadata.MetadataCache
| MetadataCache | | public class MetadataCache (Code) | | This class implements a ResultSet metadata cache.
ResultSet Fields are kept here to prevent recomputing them and allocating
them each time a query is executed.
author:
Emmanuel Cecchet
version:
1.0 |
| Constructor Summary | |
| public | MetadataCache(int maxNbOfMetadata, int maxNbOfField)
Constructor for MetadataCache. |
| MetadataCache | | public MetadataCache(int maxNbOfMetadata, int maxNbOfField)(Code) | | Constructor for MetadataCache.
Parameters:
maxNbOfMetadata - maximum nb of entries in metadata cache
Parameters:
maxNbOfField - maximum nb of entries in field cache |
| addField | | public void addField(String fullyQualifiedFieldName, Field field)(Code) | | Add a Field entry to the cache and associate it to the given name.
Parameters:
fullyQualifiedFieldName - table.column.label name that uniquelyidentifies the field
Parameters:
field - field to cache |
| addMetadata | | public void addMetadata(AbstractRequest request, Field[] metadata)(Code) | | Add a metadata entry to the cache and associate it to the given request.
Parameters:
request - request to which the metadata belong
Parameters:
metadata - metadata to cache |
| flushCache | | public void flushCache()(Code) | | Flush the cache
|
| getField | | public Field getField(String fullyQualifiedFieldName)(Code) | | Get the field corresponding to a column name.
Returns null if the cache contains no field for the given name.
Parameters:
fullyQualifiedFieldName - the field name (table.column.label) to lookfor the corresponding Field or null if not in cache |
| getMetadata | | public Field[] getMetadata(AbstractRequest request)(Code) | | Get metadata associated to a request.
Returns null if the cache contains no metadata for the given request.
Parameters:
request - the request we look for the metadata or null if not in cache |
| getXml | | public String getXml()(Code) | | Get xml information about this ParsingCache
String in xml formatted text |
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