Class CleanerGraphQueryResult
- java.lang.Object
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- org.eclipse.rdf4j.common.concurrent.locks.diagnostics.CleanerGraphQueryResult
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- All Implemented Interfaces:
java.lang.AutoCloseable
,java.lang.Iterable<Statement>
,CloseableIteration<Statement,QueryEvaluationException>
,Iteration<Statement,QueryEvaluationException>
,GraphQueryResult
,QueryResult<Statement>
@InternalUseOnly public class CleanerGraphQueryResult extends java.lang.Object implements GraphQueryResult
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Nested Class Summary
Nested Classes Modifier and Type Class Description private static class
CleanerGraphQueryResult.CleanableState
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Field Summary
Fields Modifier and Type Field Description private java.lang.ref.Cleaner.Cleanable
cleanable
private GraphQueryResult
delegate
private static org.slf4j.Logger
logger
private CleanerGraphQueryResult.CleanableState
state
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Constructor Summary
Constructors Constructor Description CleanerGraphQueryResult(GraphQueryResult delegate, ConcurrentCleaner cleaner)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
close()
Closes this iteration, freeing any resources that it is holding.java.util.Map<java.lang.String,java.lang.String>
getNamespaces()
Retrieves relevant namespaces from the query result.boolean
hasNext()
Returnstrue
if the query result has more elements.Statement
next()
Returns the next element in the query result.void
remove()
Removes from the underlying collection the last element returned by the iteration (optional operation).-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.eclipse.rdf4j.query.QueryResult
iterator, stream
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Field Detail
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logger
private static final org.slf4j.Logger logger
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delegate
private final GraphQueryResult delegate
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cleanable
private final java.lang.ref.Cleaner.Cleanable cleanable
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state
private final CleanerGraphQueryResult.CleanableState state
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Constructor Detail
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CleanerGraphQueryResult
public CleanerGraphQueryResult(GraphQueryResult delegate, ConcurrentCleaner cleaner)
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Method Detail
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close
public void close()
Description copied from interface:CloseableIteration
Closes this iteration, freeing any resources that it is holding. If the iteration has already been closed then invoking this method has no effect.- Specified by:
close
in interfacejava.lang.AutoCloseable
- Specified by:
close
in interfaceCloseableIteration<Statement,QueryEvaluationException>
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hasNext
public boolean hasNext()
Description copied from interface:QueryResult
Returnstrue
if the query result has more elements. (In other words, returnstrue
ifQueryResult.next()
would return an element rather than throwing aNoSuchElementException
.)- Specified by:
hasNext
in interfaceIteration<Statement,QueryEvaluationException>
- Specified by:
hasNext
in interfaceQueryResult<Statement>
- Returns:
true
if the iteration has more elements.
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next
public Statement next()
Description copied from interface:QueryResult
Returns the next element in the query result.- Specified by:
next
in interfaceIteration<Statement,QueryEvaluationException>
- Specified by:
next
in interfaceQueryResult<Statement>
- Returns:
- the next element in the query result.
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remove
public void remove()
Description copied from interface:Iteration
Removes from the underlying collection the last element returned by the iteration (optional operation). This method can be called only once per call to next.- Specified by:
remove
in interfaceIteration<Statement,QueryEvaluationException>
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getNamespaces
public java.util.Map<java.lang.String,java.lang.String> getNamespaces() throws QueryEvaluationException
Description copied from interface:GraphQueryResult
Retrieves relevant namespaces from the query result.
The contents of the Map may be modified after it is returned, as the initial return may be performed when the first RDF Statement is encountered.- Specified by:
getNamespaces
in interfaceGraphQueryResult
- Returns:
- a Map<String, String> object containing (prefix, namespace) pairs.
- Throws:
QueryEvaluationException
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