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java.lang.Objectorg.apache.lucene.codecs.PostingsFormat
public abstract class PostingsFormat
Encodes/decodes terms, postings, and proximity data.
Field Summary | |
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static PostingsFormat[] |
EMPTY
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Constructor Summary | |
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protected |
PostingsFormat(String name)
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Method Summary | |
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static Set<String> |
availablePostingsFormats()
returns a list of all available format names |
abstract FieldsConsumer |
fieldsConsumer(SegmentWriteState state)
Writes a new segment |
abstract FieldsProducer |
fieldsProducer(SegmentReadState state)
Reads a segment. |
static PostingsFormat |
forName(String name)
looks up a format by name |
String |
getName()
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static void |
reloadPostingsFormats(ClassLoader classloader)
Reloads the postings format list from the given ClassLoader . |
String |
toString()
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final PostingsFormat[] EMPTY
Constructor Detail |
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protected PostingsFormat(String name)
Method Detail |
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public final String getName()
getName
in interface NamedSPILoader.NamedSPI
public abstract FieldsConsumer fieldsConsumer(SegmentWriteState state) throws IOException
IOException
public abstract FieldsProducer fieldsProducer(SegmentReadState state) throws IOException
IOException
public String toString()
toString
in class Object
public static PostingsFormat forName(String name)
public static Set<String> availablePostingsFormats()
public static void reloadPostingsFormats(ClassLoader classloader)
ClassLoader
.
Changes to the postings formats are visible after the method ends, all
iterators (availablePostingsFormats()
,...) stay consistent.
NOTE: Only new postings formats are added, existing ones are never removed or replaced.
This method is expensive and should only be called for discovery of new postings formats on the given classpath/classloader!
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