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public interface FieldCache
Expert: Maintains caches of term values.
Created: May 19, 2004 11:13:14 AM
FieldCacheSanityChecker
Nested Class Summary | |
---|---|
static interface |
FieldCache.ByteParser
Interface to parse bytes from document fields. |
static class |
FieldCache.CacheEntry
EXPERT: A unique Identifier/Description for each item in the FieldCache. |
static class |
FieldCache.CreationPlaceholder
|
static interface |
FieldCache.DoubleParser
Interface to parse doubles from document fields. |
static interface |
FieldCache.FloatParser
Interface to parse floats from document fields. |
static interface |
FieldCache.IntParser
Interface to parse ints from document fields. |
static interface |
FieldCache.LongParser
Interface to parse long from document fields. |
static interface |
FieldCache.Parser
Marker interface as super-interface to all parsers. |
static interface |
FieldCache.ShortParser
Interface to parse shorts from document fields. |
static class |
FieldCache.StringIndex
Expert: Stores term text values and document ordering data. |
Field Summary | |
---|---|
static FieldCache |
DEFAULT
Expert: The cache used internally by sorting and range query classes. |
static FieldCache.ByteParser |
DEFAULT_BYTE_PARSER
The default parser for byte values, which are encoded by Byte.toString(byte) |
static FieldCache.DoubleParser |
DEFAULT_DOUBLE_PARSER
The default parser for double values, which are encoded by Double.toString(double) |
static FieldCache.FloatParser |
DEFAULT_FLOAT_PARSER
The default parser for float values, which are encoded by Float.toString(float) |
static FieldCache.IntParser |
DEFAULT_INT_PARSER
The default parser for int values, which are encoded by Integer.toString(int) |
static FieldCache.LongParser |
DEFAULT_LONG_PARSER
The default parser for long values, which are encoded by Long.toString(long) |
static FieldCache.ShortParser |
DEFAULT_SHORT_PARSER
The default parser for short values, which are encoded by Short.toString(short) |
static FieldCache.DoubleParser |
NUMERIC_UTILS_DOUBLE_PARSER
A parser instance for double values encoded with NumericUtils , e.g. |
static FieldCache.FloatParser |
NUMERIC_UTILS_FLOAT_PARSER
A parser instance for float values encoded with NumericUtils , e.g. |
static FieldCache.IntParser |
NUMERIC_UTILS_INT_PARSER
A parser instance for int values encoded by NumericUtils.intToPrefixCoded(int) , e.g. |
static FieldCache.LongParser |
NUMERIC_UTILS_LONG_PARSER
A parser instance for long values encoded by NumericUtils.longToPrefixCoded(long) , e.g. |
static int |
STRING_INDEX
Indicator for StringIndex values in the cache. |
Method Summary | |
---|---|
byte[] |
getBytes(org.apache.lucene.index.IndexReader reader,
java.lang.String field)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as a single byte and returns an array
of size reader.maxDoc() of the value each document
has in the given field. |
byte[] |
getBytes(org.apache.lucene.index.IndexReader reader,
java.lang.String field,
FieldCache.ByteParser parser)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as bytes and returns an array of
size reader.maxDoc() of the value each document has in the
given field. |
FieldCache.CacheEntry[] |
getCacheEntries()
EXPERT: Generates an array of CacheEntry objects representing all items currently in the FieldCache. |
double[] |
getDoubles(org.apache.lucene.index.IndexReader reader,
java.lang.String field)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as integers and returns an array
of size reader.maxDoc() of the value each document
has in the given field. |
double[] |
getDoubles(org.apache.lucene.index.IndexReader reader,
java.lang.String field,
FieldCache.DoubleParser parser)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as doubles and returns an array of
size reader.maxDoc() of the value each document has in the
given field. |
float[] |
getFloats(org.apache.lucene.index.IndexReader reader,
java.lang.String field)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as floats and returns an array
of size reader.maxDoc() of the value each document
has in the given field. |
float[] |
getFloats(org.apache.lucene.index.IndexReader reader,
java.lang.String field,
FieldCache.FloatParser parser)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as floats and returns an array
of size reader.maxDoc() of the value each document
has in the given field. |
java.io.PrintStream |
getInfoStream()
counterpart of setInfoStream(PrintStream) |
int[] |
getInts(org.apache.lucene.index.IndexReader reader,
java.lang.String field)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as integers and returns an array
of size reader.maxDoc() of the value each document
has in the given field. |
int[] |
getInts(org.apache.lucene.index.IndexReader reader,
java.lang.String field,
FieldCache.IntParser parser)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as integers and returns an array of
size reader.maxDoc() of the value each document has in the
given field. |
long[] |
getLongs(org.apache.lucene.index.IndexReader reader,
java.lang.String field)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as longs and returns an array
of size reader.maxDoc() of the value each document
has in the given field. |
long[] |
getLongs(org.apache.lucene.index.IndexReader reader,
java.lang.String field,
FieldCache.LongParser parser)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as longs and returns an array of
size reader.maxDoc() of the value each document has in the
given field. |
short[] |
getShorts(org.apache.lucene.index.IndexReader reader,
java.lang.String field)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as shorts and returns an array
of size reader.maxDoc() of the value each document
has in the given field. |
short[] |
getShorts(org.apache.lucene.index.IndexReader reader,
java.lang.String field,
FieldCache.ShortParser parser)
Checks the internal cache for an appropriate entry, and if none is found, reads the terms in field as shorts and returns an array of
size reader.maxDoc() of the value each document has in the
given field. |
FieldCache.StringIndex |
getStringIndex(org.apache.lucene.index.IndexReader reader,
java.lang.String field)
Checks the internal cache for an appropriate entry, and if none is found reads the term values in field and returns
an array of them in natural order, along with an array telling
which element in the term array each document uses. |
java.lang.String[] |
getStrings(org.apache.lucene.index.IndexReader reader,
java.lang.String field)
Checks the internal cache for an appropriate entry, and if none is found, reads the term values in field and returns an array
of size reader.maxDoc() containing the value each document
has in the given field. |
void |
purge(org.apache.lucene.index.IndexReader r)
Expert: drops all cache entries associated with this reader. |
void |
purgeAllCaches()
EXPERT: Instructs the FieldCache to forcibly expunge all entries from the underlying caches. |
void |
setIndexReaderPurgedListener(IndexReaderPurgedListener listener)
|
void |
setInfoStream(java.io.PrintStream stream)
If non-null, FieldCacheImpl will warn whenever entries are created that are not sane according to FieldCacheSanityChecker . |
Field Detail |
---|
static final int STRING_INDEX
static final FieldCache DEFAULT
static final FieldCache.ByteParser DEFAULT_BYTE_PARSER
Byte.toString(byte)
static final FieldCache.ShortParser DEFAULT_SHORT_PARSER
Short.toString(short)
static final FieldCache.IntParser DEFAULT_INT_PARSER
Integer.toString(int)
static final FieldCache.FloatParser DEFAULT_FLOAT_PARSER
Float.toString(float)
static final FieldCache.LongParser DEFAULT_LONG_PARSER
Long.toString(long)
static final FieldCache.DoubleParser DEFAULT_DOUBLE_PARSER
Double.toString(double)
static final FieldCache.IntParser NUMERIC_UTILS_INT_PARSER
NumericUtils.intToPrefixCoded(int)
, e.g. when indexed
via NumericField
/NumericTokenStream
.
static final FieldCache.FloatParser NUMERIC_UTILS_FLOAT_PARSER
NumericUtils
, e.g. when indexed
via NumericField
/NumericTokenStream
.
static final FieldCache.LongParser NUMERIC_UTILS_LONG_PARSER
NumericUtils.longToPrefixCoded(long)
, e.g. when indexed
via NumericField
/NumericTokenStream
.
static final FieldCache.DoubleParser NUMERIC_UTILS_DOUBLE_PARSER
NumericUtils
, e.g. when indexed
via NumericField
/NumericTokenStream
.
Method Detail |
---|
void setIndexReaderPurgedListener(IndexReaderPurgedListener listener)
byte[] getBytes(org.apache.lucene.index.IndexReader reader, java.lang.String field) throws java.io.IOException
field
as a single byte and returns an array
of size reader.maxDoc()
of the value each document
has in the given field.
reader
- Used to get field values.field
- Which field contains the single byte values.
java.io.IOException
- If any error occurs.byte[] getBytes(org.apache.lucene.index.IndexReader reader, java.lang.String field, FieldCache.ByteParser parser) throws java.io.IOException
field
as bytes and returns an array of
size reader.maxDoc()
of the value each document has in the
given field.
reader
- Used to get field values.field
- Which field contains the bytes.parser
- Computes byte for string values.
java.io.IOException
- If any error occurs.short[] getShorts(org.apache.lucene.index.IndexReader reader, java.lang.String field) throws java.io.IOException
field
as shorts and returns an array
of size reader.maxDoc()
of the value each document
has in the given field.
reader
- Used to get field values.field
- Which field contains the shorts.
java.io.IOException
- If any error occurs.short[] getShorts(org.apache.lucene.index.IndexReader reader, java.lang.String field, FieldCache.ShortParser parser) throws java.io.IOException
field
as shorts and returns an array of
size reader.maxDoc()
of the value each document has in the
given field.
reader
- Used to get field values.field
- Which field contains the shorts.parser
- Computes short for string values.
java.io.IOException
- If any error occurs.int[] getInts(org.apache.lucene.index.IndexReader reader, java.lang.String field) throws java.io.IOException
field
as integers and returns an array
of size reader.maxDoc()
of the value each document
has in the given field.
reader
- Used to get field values.field
- Which field contains the integers.
java.io.IOException
- If any error occurs.int[] getInts(org.apache.lucene.index.IndexReader reader, java.lang.String field, FieldCache.IntParser parser) throws java.io.IOException
field
as integers and returns an array of
size reader.maxDoc()
of the value each document has in the
given field.
reader
- Used to get field values.field
- Which field contains the integers.parser
- Computes integer for string values.
java.io.IOException
- If any error occurs.float[] getFloats(org.apache.lucene.index.IndexReader reader, java.lang.String field) throws java.io.IOException
field
as floats and returns an array
of size reader.maxDoc()
of the value each document
has in the given field.
reader
- Used to get field values.field
- Which field contains the floats.
java.io.IOException
- If any error occurs.float[] getFloats(org.apache.lucene.index.IndexReader reader, java.lang.String field, FieldCache.FloatParser parser) throws java.io.IOException
field
as floats and returns an array
of size reader.maxDoc()
of the value each document
has in the given field.
reader
- Used to get field values.field
- Which field contains the floats.parser
- Computes float for string values.
java.io.IOException
- If any error occurs.long[] getLongs(org.apache.lucene.index.IndexReader reader, java.lang.String field) throws java.io.IOException
field
as longs and returns an array
of size reader.maxDoc()
of the value each document
has in the given field.
reader
- Used to get field values.field
- Which field contains the longs.
java.io.IOException
- If any error occurs.long[] getLongs(org.apache.lucene.index.IndexReader reader, java.lang.String field, FieldCache.LongParser parser) throws java.io.IOException
field
as longs and returns an array of
size reader.maxDoc()
of the value each document has in the
given field.
reader
- Used to get field values.field
- Which field contains the longs.parser
- Computes integer for string values.
java.io.IOException
- If any error occurs.double[] getDoubles(org.apache.lucene.index.IndexReader reader, java.lang.String field) throws java.io.IOException
field
as integers and returns an array
of size reader.maxDoc()
of the value each document
has in the given field.
reader
- Used to get field values.field
- Which field contains the doubles.
java.io.IOException
- If any error occurs.double[] getDoubles(org.apache.lucene.index.IndexReader reader, java.lang.String field, FieldCache.DoubleParser parser) throws java.io.IOException
field
as doubles and returns an array of
size reader.maxDoc()
of the value each document has in the
given field.
reader
- Used to get field values.field
- Which field contains the doubles.parser
- Computes integer for string values.
java.io.IOException
- If any error occurs.java.lang.String[] getStrings(org.apache.lucene.index.IndexReader reader, java.lang.String field) throws java.io.IOException
field
and returns an array
of size reader.maxDoc()
containing the value each document
has in the given field.
reader
- Used to get field values.field
- Which field contains the strings.
java.io.IOException
- If any error occurs.FieldCache.StringIndex getStringIndex(org.apache.lucene.index.IndexReader reader, java.lang.String field) throws java.io.IOException
field
and returns
an array of them in natural order, along with an array telling
which element in the term array each document uses.
reader
- Used to get field values.field
- Which field contains the strings.
java.io.IOException
- If any error occurs.FieldCache.CacheEntry[] getCacheEntries()
NOTE: These CacheEntry objects maintain a strong reference to the Cached Values. Maintaining references to a CacheEntry the IndexReader associated with it has garbage collected will prevent the Value itself from being garbage collected when the Cache drops the WeakRefrence.
EXPERIMENTAL API: This API is considered extremely advanced and experimental. It may be removed or altered w/o warning in future releases of Lucene.
void purgeAllCaches()
EXPERT: Instructs the FieldCache to forcibly expunge all entries from the underlying caches. This is intended only to be used for test methods as a way to ensure a known base state of the Cache (with out needing to rely on GC to free WeakReferences). It should not be relied on for "Cache maintenance" in general application code.
EXPERIMENTAL API: This API is considered extremely advanced and experimental. It may be removed or altered w/o warning in future releases of Lucene.
void purge(org.apache.lucene.index.IndexReader r)
void setInfoStream(java.io.PrintStream stream)
FieldCacheSanityChecker
.
java.io.PrintStream getInfoStream()
setInfoStream(PrintStream)
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SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |