net.ontopia.topicmaps.core
Interface OccurrenceIF

All Superinterfaces:

ReifiableIF, ScopedIF, TMObjectIF, TypedIF

All Known Implementing Classes:

Occurrence, Occurrence, ReadOnlyOccurrence, SnapshotOccurrence

public interface OccurrenceIF
extends ScopedIF, TypedIF, ReifiableIF

PUBLIC: Implemented by objects representing occurrences in the topic map model. An occurrence is a relationship between a topic, and an information resource which is relevant to that topic.

NOTE Comments partly revised only.

Field Summary

static String	EVENT_ADD_THEME
static String	EVENT_ADDED
static String	EVENT_REMOVE_THEME
static String	EVENT_REMOVED
static String	EVENT_SET_DATATYPE
static String	EVENT_SET_TYPE
static String	EVENT_SET_VALUE

Fields inherited from interface net.ontopia.topicmaps.core.ReifiableIF

EVENT_SET_REIFIER

Fields inherited from interface net.ontopia.topicmaps.core.TMObjectIF

EVENT_ADD_ITEMIDENTIFIER, EVENT_REMOVE_ITEMIDENTIFIER

Method Summary

LocatorIF	getDataType() PUBLIC: Gets the data type of this occurrence.
long	getLength() PUBLIC: Returns the length of the occurrence value.
LocatorIF	getLocator() PUBLIC: Returns a LocatorIF representation of the occurrence value.
Reader	getReader() PUBLIC: Returns a Reader that allows you to stream the string representation of this occurrence.
TopicIF	getTopic() PUBLIC: Gets the topic for this occurrence.
String	getValue() PUBLIC: Gets the string representation of this occurrence.
void	setLocator(LocatorIF locator) PUBLIC: Same as setValue(locator.getAddress(), DataTypes.TYPE_URI).
void	setReader(Reader value, long length, LocatorIF datatype) PUBLIC: Sets the value and the data type of this occurrence using a reader.
void	setValue(String value) PUBLIC: Same as setValue(value, DataTypes.TYPE_STRING).
void	setValue(String value, LocatorIF datatype) PUBLIC: Sets the value and the data type of this occurrence using a string.

Methods inherited from interface net.ontopia.topicmaps.core.ScopedIF

addTheme, getScope, removeTheme

Methods inherited from interface net.ontopia.topicmaps.core.TypedIF

getType, setType

Methods inherited from interface net.ontopia.topicmaps.core.ReifiableIF

getReifier, setReifier

Methods inherited from interface net.ontopia.topicmaps.core.TMObjectIF

addItemIdentifier, getItemIdentifiers, getObjectId, getTopicMap, isReadOnly, remove, removeItemIdentifier

Field Detail

EVENT_ADDED

static final String EVENT_ADDED

See Also:

Constant Field Values

EVENT_REMOVED

static final String EVENT_REMOVED

See Also:

Constant Field Values

EVENT_SET_TYPE

static final String EVENT_SET_TYPE

See Also:

Constant Field Values

EVENT_SET_VALUE

static final String EVENT_SET_VALUE

See Also:

Constant Field Values

EVENT_SET_DATATYPE

static final String EVENT_SET_DATATYPE

See Also:

Constant Field Values

EVENT_ADD_THEME

static final String EVENT_ADD_THEME

See Also:

Constant Field Values

EVENT_REMOVE_THEME

static final String EVENT_REMOVE_THEME

See Also:

Constant Field Values

Method Detail

getTopic

TopicIF getTopic()

PUBLIC: Gets the topic for this occurrence.

Returns:

The topic to which this occurrence belongs; an object implementing TopicIF.

getDataType

LocatorIF getDataType()

PUBLIC: Gets the data type of this occurrence.

Since:

4.0

getValue

String getValue()

PUBLIC: Gets the string representation of this occurrence. This method will return null if the length of the value exceeds the supported maximum size.

getReader

Reader getReader()

PUBLIC: Returns a Reader that allows you to stream the string representation of this occurrence. Values of all sizes are supported by this method.

Since:

4.0

setValue

void setValue(String value)

PUBLIC: Same as setValue(value, DataTypes.TYPE_STRING). This method is here primarily for backwards compatibility.

getLocator

LocatorIF getLocator()

PUBLIC: Returns a LocatorIF representation of the occurrence value. This method will return null if the value is not of type xsd:anyURI (same as DataType.TYPE_URI). This method is here primarily for backwards compatibility.

setLocator

void setLocator(LocatorIF locator)

PUBLIC: Same as setValue(locator.getAddress(), DataTypes.TYPE_URI). This method is here primarily for backwards compatibility.

setValue

void setValue(String value,
              LocatorIF datatype)

PUBLIC: Sets the value and the data type of this occurrence using a string. The value must conform to the correct string representation according to the datatype.

Since:

4.0

setReader

void setReader(Reader value,
               long length,
               LocatorIF datatype)

PUBLIC: Sets the value and the data type of this occurrence using a reader. The reader value must conform to the correct string representation according to the datatype.

Since:

4.0

getLength

long getLength()

PUBLIC: Returns the length of the occurrence value. The number of characters in the string representation is returned.

Since:

4.0