Package it.unimi.di.big.mg4j.document

Class CompositeDocumentFactory.CompositeDocument

java.lang.Object

it.unimi.di.big.mg4j.document.AbstractDocument

it.unimi.di.big.mg4j.document.CompositeDocumentFactory.CompositeDocument

All Implemented Interfaces:

Document, SafelyCloseable, Closeable, AutoCloseable

Enclosing class:

CompositeDocumentFactory

protected class CompositeDocumentFactory.CompositeDocument
extends AbstractDocument

A document obtained by composition of documents of underyling factories.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CompositeDocument(Reference2ObjectMap<Enum<?>,Object> metadata, InputStream rawContent)

Method Summary

Modifier and Type	Method	Description
void	close()	Closes this document, releasing all resources.
Object	content(int field)	Returns the content of the given field.
CharSequence	title()	The title of this document.
String	toString()
CharSequence	uri()	A URI that is associated with this document.
WordReader	wordReader(int field)	Returns a word reader for the given DocumentFactory.FieldType.TEXT field.

Methods inherited from class it.unimi.di.big.mg4j.document.AbstractDocument

finalize

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CompositeDocument

protected CompositeDocument(Reference2ObjectMap<Enum<?>,Object> metadata,
                            InputStream rawContent)
                     throws IOException

Throws:

IOException

Method Detail

title

public CharSequence title()

Description copied from interface: Document

The title of this document.

Returns:

the title to be used to refer to this document.

toString

public String toString()

Overrides:

toString in class AbstractDocument

uri

public CharSequence uri()

Description copied from interface: Document

A URI that is associated with this document.

Returns:

the URI associated with this document, or null.

content

public Object content(int field)
               throws IOException

Description copied from interface: Document

Returns the content of the given field.

Parameters:

field - the field index.

Returns:

the field content; the actual type depends on the field type, as specified by the DocumentFactory that built this document. For example, the returned object is going to be a Reader if the field type is DocumentFactory.FieldType.TEXT.

Throws:

IOException

wordReader

public WordReader wordReader(int field)

Description copied from interface: Document

Returns a word reader for the given DocumentFactory.FieldType.TEXT field.

Parameters:

field - the field index.

Returns:

a word reader object that should be used to break the given field.

close

public void close()
           throws IOException

Description copied from interface: Document

Closes this document, releasing all resources.

You should always call this method after manipulating a document. Implementations are invited to call this method in a finaliser as a safety net (even better, implement SafelyCloseable), but since there is no guarantee as to when finalisers are invoked, you should not depend on this behaviour.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface Document

Overrides:

close in class AbstractDocument

Throws:

IOException