| java.lang.Object
 com.hp.hpl.jena.db.impl.ResultSetIterator
com.hp.hpl.jena.db.impl.ResultSetReifIterator
| ResultSetReifIterator | | public class ResultSetReifIterator extends ResultSetIterator (Code) | | Version of ResultSetIterator that extracts database rows as Triples from a reified statement table.
author:
hkuno. Based on ResultSetResource Iterator, by Dave Reynolds, HPLabs, Bristol Dave Reynolds
version:
$Revision: 1.13 $ on $Date: 2008/01/02 12:08:23 $ |
| Method Summary | |
| protected void | deleteRow()
Delete the current row, which should have already been extracted. | | protected void | extractRow()
Extract the current row into a triple. | | protected int | getFragCount()
Return the number of (reification statement) fragments for the current row. | | protected boolean | getHasType()
Return the hasType value of current row, which should have already been extracted. | | protected Object | getRow()
Return triples for the current row, which should have already been extracted. | | protected Node | getStmtURI()
Return the reifying URI for current row, which should have already been extracted. | | protected boolean | hasObj()
Return the true if the current row has a non-null object. | | protected boolean | hasPred()
Return the true if the current row has a non-null predicate. | | protected boolean | hasSubj()
Return the true if the current row has a non-null subject. | | protected boolean | hasType()
Return the true if the current row has T (true) for hasType. | | public void | reset(ResultSet resultSet, PreparedStatement sourceStatement, SQLCache cache, String opname)
Reset an existing iterator to scan a new result set. | | public void | setGraphID(IDBID gid)
Set m_graphID. |
| logger | | protected static Log logger(Code) | | |
| m_fragCount | | protected int m_fragCount(Code) | | total number of fragments to generate for this row (ranges 1-4)
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| m_fragRem | | protected int m_fragRem(Code) | | number of remaining fragments to generate for this row (ranges 1-4)
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| m_getTriples | | protected boolean m_getTriples(Code) | | getTriples is true if this iterator should return all triples for the reified statement
otherwise, reified statements are returned.
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| m_graphID | | protected IDBID m_graphID(Code) | | The rdf model in which to instantiate any resources
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| m_hasType | | protected boolean m_hasType(Code) | | HasType flag is true if reified statement has type rdf:Statement
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| m_matchObj | | protected Node m_matchObj(Code) | | a triple match over a reified table might specify an object value
to match but no property. so, return all columns (properties)
that match the specified object value.
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| m_nextFrag | | protected int m_nextFrag(Code) | | number of next fragment to generate (0-3 for subj, pred, obj, type).
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| m_propCol | | protected int m_propCol(Code) | | a triple match over a reified table might return one property.
m_propCol identifies the column number of the property to return.
it ranges 1-4.
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| m_pset | | protected IPSet m_pset(Code) | | The database driver, used to access namespace and resource caches
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| m_stmtURI | | protected Node m_stmtURI(Code) | | Statement URI of current row
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| m_subjNode | | protected Node m_subjNode(Code) | | Holds subject, predicate and object of current row
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| ResultSetReifIterator | | public ResultSetReifIterator(IPSet p, boolean getTriples, IDBID graphID)(Code) | | |
| ResultSetReifIterator | | public ResultSetReifIterator(IPSet p, char getProp, IDBID graphID)(Code) | | |
| deleteRow | | protected void deleteRow()(Code) | | Delete the current row, which should have already been extracted.
Should only be used (carefully and) internally by db layer.
|
| extractRow | | protected void extractRow() throws SQLException(Code) | | Extract the current row into a triple.
Requires the row to be of the form:
subject URI (String)
predicate URI (String)
object URI (String)
object value (String)
Object literal id (Object)
The object of the triple can be either a URI, a simple literal (in
which case it will just have an object value, or a complex literal
(in which case both the object value and the object literal id
columns may be populated.
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| getFragCount | | protected int getFragCount()(Code) | | Return the number of (reification statement) fragments for the current row.
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| getHasType | | protected boolean getHasType()(Code) | | Return the hasType value of current row, which should have already been extracted.
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| getRow | | protected Object getRow()(Code) | | Return triples for the current row, which should have already been extracted.
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| getStmtURI | | protected Node getStmtURI()(Code) | | Return the reifying URI for current row, which should have already been extracted.
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| hasObj | | protected boolean hasObj()(Code) | | Return the true if the current row has a non-null object.
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| hasPred | | protected boolean hasPred()(Code) | | Return the true if the current row has a non-null predicate.
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| hasSubj | | protected boolean hasSubj()(Code) | | Return the true if the current row has a non-null subject.
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| hasType | | protected boolean hasType()(Code) | | Return the true if the current row has T (true) for hasType.
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| reset | | public void reset(ResultSet resultSet, PreparedStatement sourceStatement, SQLCache cache, String opname)(Code) | | Reset an existing iterator to scan a new result set.
Parameters:
resultSet - the result set being iterated over
Parameters:
sourceStatement - The source Statement to be cleaned up when the iterator finishes - return it to cache or close it if no cache
Parameters:
cache - The originating SQLcache to return the statement to, can be null
Parameters:
opname - The name of the original operation that lead to this statement, can be null if SQLCache is null |
| setGraphID | | public void setGraphID(IDBID gid)(Code) | | Set m_graphID.
Parameters:
gid - is the id of the graph associated with this iterator. |
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