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java.lang.Object org.apache.accumulo.core.iterators.system.SequenceFileIterator
public class SequenceFileIterator
Constructor Summary | |
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SequenceFileIterator(MySequenceFile.Reader reader,
boolean readValue)
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Method Summary | |
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void |
close()
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void |
closeDeepCopies()
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SequenceFileIterator |
deepCopy(IteratorEnvironment env)
Creates a deep copy of this iterator as though seek had not yet been called. |
Key |
getFirstKey()
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Key |
getLastKey()
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DataInputStream |
getMetaStore(String name)
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Key |
getTopKey()
Returns top key. |
Value |
getTopValue()
Returns top value. |
boolean |
hasTop()
Returns true if the iterator has more elements. |
void |
init(SortedKeyValueIterator<Key,Value> source,
Map<String,String> options,
IteratorEnvironment env)
Initializes the iterator. |
void |
next()
Advances to the next K,V pair. |
void |
seek(Range range,
Collection<ByteSequence> columnFamilies,
boolean inclusive)
Seeks to the first key in the Range, restricting the resulting K,V pairs to those with the specified columns. |
void |
setInterruptFlag(AtomicBoolean flag)
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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 SequenceFileIterator(MySequenceFile.Reader reader, boolean readValue) throws IOException
IOException
Method Detail |
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public SequenceFileIterator deepCopy(IteratorEnvironment env)
SortedKeyValueIterator
deepCopy
in interface SortedKeyValueIterator<Key,Value>
env
- IteratorEnvironment environment in which iterator is being run.
public void closeDeepCopies() throws IOException
closeDeepCopies
in interface FileSKVIterator
IOException
public Key getTopKey()
SortedKeyValueIterator
getTopKey
in interface SortedKeyValueIterator<Key,Value>
public Value getTopValue()
SortedKeyValueIterator
getTopValue
in interface SortedKeyValueIterator<Key,Value>
public boolean hasTop()
SortedKeyValueIterator
hasTop
in interface SortedKeyValueIterator<Key,Value>
public void next() throws IOException
SortedKeyValueIterator
next
in interface SortedKeyValueIterator<Key,Value>
IOException
- if an I/O error occurs.public void seek(Range range, Collection<ByteSequence> columnFamilies, boolean inclusive) throws IOException
SortedKeyValueIterator
seek
in interface SortedKeyValueIterator<Key,Value>
range
- Range of keys to iterate over.columnFamilies
- Collection of column families to include or exclude.inclusive
- boolean that indicates whether to include (true) or exclude (false) column families.
IOException
- if an I/O error occurs.public void init(SortedKeyValueIterator<Key,Value> source, Map<String,String> options, IteratorEnvironment env) throws IOException
SortedKeyValueIterator
init
in interface SortedKeyValueIterator<Key,Value>
source
- SortedKeyValueIterator source to read data from.options
- Map map of string option names to option values.env
- IteratorEnvironment environment in which iterator is being run.
IOException
- unused.public void close() throws IOException
close
in interface FileSKVIterator
IOException
public Key getFirstKey() throws IOException
getFirstKey
in interface FileSKVIterator
IOException
public Key getLastKey() throws IOException
getLastKey
in interface FileSKVIterator
IOException
public DataInputStream getMetaStore(String name) throws IOException
getMetaStore
in interface FileSKVIterator
IOException
public void setInterruptFlag(AtomicBoolean flag)
setInterruptFlag
in interface InterruptibleIterator
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