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java.lang.Object org.apache.openjpa.lib.rop.RangeResultObjectProvider
public class RangeResultObjectProvider
Prevents a view of a given range of indices from the delegate result object provider.
Constructor Summary | |
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RangeResultObjectProvider(ResultObjectProvider delegate,
long startIdx,
long endIdx)
Constructor. |
Method Summary | |
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boolean |
absolute(int pos)
Move to the given 0-based position. |
void |
close()
Free the resources associated with this provider. |
Object |
getResultObject()
Instantiate the current result object. |
void |
handleCheckedException(Exception e)
Any checked exceptions that are thrown will be passed to this method. |
boolean |
next()
Advance the input to the next position. |
void |
open()
Open the result. |
void |
reset()
Reset this provider. |
int |
size()
Return the number of items in the input, or Integer.MAX_VALUE
if the size in unknown. |
boolean |
supportsRandomAccess()
Return true if this provider supports random access. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public RangeResultObjectProvider(ResultObjectProvider delegate, long startIdx, long endIdx)
delegate
- the result object provider to delegate tostartIdx
- 0-based inclusive start index of the range
to present; must be < Integer.MAX_VALUEendIdx
- 0-based exclusive end index of the range to
present; must be < Integer.MAX_VALUE, or Long.MAX_VALUE for no limitMethod Detail |
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public boolean supportsRandomAccess()
ResultObjectProvider
supportsRandomAccess
in interface ResultObjectProvider
public void open() throws Exception
ResultObjectProvider
ResultObjectProvider.next()
, ResultObjectProvider.absolute(int)
, or ResultObjectProvider.size()
.
open
in interface ResultObjectProvider
Exception
public Object getResultObject() throws Exception
ResultObjectProvider
ResultObjectProvider.next()
or ResultObjectProvider.absolute(int)
.
getResultObject
in interface ResultObjectProvider
Exception
public boolean next() throws Exception
ResultObjectProvider
true
if
there is more data; otherwise false
.
next
in interface ResultObjectProvider
Exception
public boolean absolute(int pos) throws Exception
ResultObjectProvider
true
if there is data at this position;
otherwise false
. This may be invoked in place of
ResultObjectProvider.next()
.
absolute
in interface ResultObjectProvider
Exception
public int size() throws Exception
ResultObjectProvider
Integer.MAX_VALUE
if the size in unknown.
size
in interface ResultObjectProvider
Exception
public void reset() throws Exception
ResultObjectProvider
reset
in interface ResultObjectProvider
Exception
public void close() throws Exception
ResultObjectProvider
close
in interface ResultObjectProvider
close
in interface Closeable
Exception
public void handleCheckedException(Exception e)
ResultObjectProvider
handleCheckedException
in interface ResultObjectProvider
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