org.mmbase.applications.media.builders
Class MediaSources

java.lang.Object
  org.mmbase.util.functions.FunctionProvider
      org.mmbase.module.core.MMTable
          org.mmbase.module.core.MMObjectBuilder
              org.mmbase.applications.media.builders.MediaSources

All Implemented Interfaces:

EventListener, NodeEventListener, RelationEventListener

Direct Known Subclasses:

AudioSources

public class MediaSources

extends MMObjectBuilder

The MediaSource builder describes a specific type of media that can be retrieved (real/mp3/etc). Information about format, quality, and status will be maintained in this object. A MediaSource belongs to a MediaFragement that describes the piece of media, the MediaSource is the real audio/video itself. A MediaSource is connected to provider objects that indicate where the real audio/video files can be found.

Since:

MMBase-1.7

Version:

$Id: MediaSources.java,v 1.34 2005/10/06 11:46:31 michiel Exp $

Author:

Rob Vermeulen, Michiel Meeuwissen

Field Summary

static Parameter[]	AVAILABLE_PARAMETERS
static Parameter[]	CODEC_PARAMETERS
static Parameter[]	FILTEREDURLS_PARAMETERS
static Parameter[]	FORMAT_PARAMETERS
static String	FUNCTION_AVAILABLE
static String	FUNCTION_CODEC
static String	FUNCTION_FILTEREDURLS
static String	FUNCTION_FORMAT
static String	FUNCTION_MIMETYPE
static String	FUNCTION_URL
static String	FUNCTION_URLS
static Parameter[]	MIMETYPE_PARAMETERS
static int	MONO
static int	STATE_DONE
static int	STATE_REMOVED
static int	STATE_SOURCE
static String	STATES_RESOURCE
static int	STEREO
static Parameter[]	URL_PARAMETERS
static Parameter[]	URLS_PARAMETERS

Fields inherited from class org.mmbase.module.core.MMObjectBuilder

AGE_PARAMETERS, broadCastChanges, DEFAULT_ALINEA, DEFAULT_EOL, description, descriptions, EVENT_TYPE_LOCAL, EVENT_TYPE_REMOTE, FIELD_NUMBER, FIELD_OBJECT_TYPE, FIELD_OWNER, fields, genericBlobCache, getFunctions, GUI_PARAMETERS, guiFunction, infoFunction, internalVersion, nodeCache, oType, searchAge, SYSTEM_OWNER, TEMPNODE_DEFAULT_SIZE, temporaryNodes, TMP_FIELD_NUMBER, virtual, WRAP_PARAMETERS, wrapFunction

Fields inherited from class org.mmbase.module.core.MMTable

maxNodesFromQuery, mmb, storageConnector, tableName

Fields inherited from class org.mmbase.util.functions.FunctionProvider

functions

Constructor Summary

MediaSources()

Method Summary

void	addProvider(MMObjectNode source, String providername, String owner) relates a source with given provider.
boolean	commit(MMObjectNode node) The commit can be used to automaticly fill unfilled fields.
MMObjectNode	createSource(MMObjectNode mediafragment, int status, int format, int speed, int channels, String url, String owner) create a new mediasource, and relate it with specified mediafragment.
protected Object	executeFunction(MMObjectNode node, String function, List args) Executes a function on the field of a node, and returns the result. This method is called by the builder's MMObjectBuilder.getValue(org.mmbase.module.core.MMObjectNode, java.lang.String) method. Derived builders should override this method to provide additional functions.
int	getChannels(MMObjectNode node)
protected Codec	getCodec(MMObjectNode source) The codec field is an integer, this function returns a string-presentation
protected List	getFilteredURLs(MMObjectNode source, MMObjectNode fragment, Map info) Returns all URLs for this source, but filtered, with the best ones on top.
protected Format	getFormat(MMObjectNode source) The format field is an integer, this function returns a string-presentation
protected String	getFormat(MMObjectNode source, Map info)
String	getGUIIndicator(MMObjectNode source) used in the editors
protected List	getProviders(MMObjectNode source) get all mediaproviders belonging to this mediasource
int	getSpeed(MMObjectNode node)
protected String	getURL(MMObjectNode source, Map info) resolve the url of the mediasource.
protected List	getURLs(MMObjectNode source, MMObjectNode fragment, Map info, List urls, Set cacheExpireObjects) Returns all possible URLs for this source.
boolean	init() Initializes this builder The property 'mmb' needs to be set for the builder before this method can be called. The method retrieves data from the TypeDef builder, or adds data to that builder if the current builder is not yet registered.
int	insert(String owner, MMObjectNode node) Insert a new object (content provided) in the cloud, including an entry for the object alias (if provided).
boolean	setValue(MMObjectNode node, String fieldName, Object value) Sets a key/value pair in the main values of this node.

Methods inherited from class org.mmbase.module.core.MMObjectBuilder

addEventListener, addField, addLocalObserver, addRemoteObserver, broadcastChanges, checkAddTmpField, clearBlobCache, create, createAlias, createAlias, delete, equals, equals, executeFunction, fieldLocalChanged, getAncestors, getBlobCache, getClassName, getConfigFile, getConfigResource, getDataTypeCollector, getDBKey, getDBState, getDBType, getDefaultTeaser, getDefaultUrl, getDescendants, getDescription, getDescription, getDescriptions, getEditFields, getEmptyNode, getField, getFieldNames, getFields, getFields, getFunction, getFunctionParameters, getFunctions, getGUIIndicator, getGUIIndicator, getHardNode, getHardNode, getHTML, getInitParameter, getInitParameters, getInternalVersion, getList, getLocaleGUIIndicator, getLocaleGUIIndicator, getMachineName, getMaintainer, getNewNode, getNewTmpNode, getNextField, getNextField, getNode, getNode, getNode, getNodeFromCache, getNodeGUIIndicator, getNumber, getObjectType, getObjectValue, getParentBuilder, getPluralName, getPluralName, getPluralNames, getRelations_main, getSearchAge, getShort, getShortedByte, getShortedText, getSingularName, getSingularName, getSingularNames, getSmartPath, getSortedFields, getSortedListFields, getTmpNode, getURLEncode, getValue, getVersion, getWAP, getXMLPath, hasField, hashCode, hashCode, hostname_function, insert, isExtensionOf, isNodeCached, isVirtual, newFunctionInstance, nodeLocalChanged, nodeRemoteChanged, notify, notify, preCommit, process, putTmpNode, removeEventListener, removeField, removeLocalObserver, removeNode, removeRelations, removeRemoteObserver, removeSyncNodes, removeTmpNode, replace, safeCache, sendFieldChangeSignal, setDefaults, setDescription, setDescriptions, setFields, setInitParameter, setMaintainer, setParentBuilder, setPluralNames, setSearchAge, setSingularNames, setUniqueValue, setUniqueValue, setValue, setVersion, setXMLPath, testValidData, toString, toString, update, updateFields, wrap

Methods inherited from class org.mmbase.module.core.MMTable

count, count, created, getFullTableName, getMMBase, getNode, getNodes, getNodes, getNodes, getNodeType, getStorageConnector, getTableName, search, searchVector, setMMBase, setTableName, size

Methods inherited from class org.mmbase.util.functions.FunctionProvider

addFunction, createParameters, getFunction, getFunctions, getFunctionValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

FUNCTION_URLS

public static final String FUNCTION_URLS

See Also:

Constant Field Values

FUNCTION_FILTEREDURLS

public static final String FUNCTION_FILTEREDURLS

See Also:

Constant Field Values

FUNCTION_URL

public static final String FUNCTION_URL

See Also:

Constant Field Values

FUNCTION_AVAILABLE

public static final String FUNCTION_AVAILABLE

See Also:

Constant Field Values

FUNCTION_FORMAT

public static final String FUNCTION_FORMAT

See Also:

Constant Field Values

FUNCTION_CODEC

public static final String FUNCTION_CODEC

See Also:

Constant Field Values

FUNCTION_MIMETYPE

public static final String FUNCTION_MIMETYPE

See Also:

Constant Field Values

URLS_PARAMETERS

public static final Parameter[] URLS_PARAMETERS

FILTEREDURLS_PARAMETERS

public static final Parameter[] FILTEREDURLS_PARAMETERS

URL_PARAMETERS

public static final Parameter[] URL_PARAMETERS

AVAILABLE_PARAMETERS

public static final Parameter[] AVAILABLE_PARAMETERS

FORMAT_PARAMETERS

public static final Parameter[] FORMAT_PARAMETERS

CODEC_PARAMETERS

public static final Parameter[] CODEC_PARAMETERS

MIMETYPE_PARAMETERS

public static final Parameter[] MIMETYPE_PARAMETERS

STATE_DONE

public static final int STATE_DONE

See Also:

Constant Field Values

STATE_SOURCE

public static final int STATE_SOURCE

See Also:

Constant Field Values

STATE_REMOVED

public static final int STATE_REMOVED

See Also:

Constant Field Values

STATES_RESOURCE

public static final String STATES_RESOURCE

See Also:

Constant Field Values

MONO

public static final int MONO

See Also:

Constant Field Values

STEREO

public static final int STEREO

See Also:

Constant Field Values

Constructor Detail

MediaSources

public MediaSources()

Method Detail

init

public boolean init()

Initializes this builder The property 'mmb' needs to be set for the builder before this method can be called. The method retrieves data from the TypeDef builder, or adds data to that builder if the current builder is not yet registered.

Overrides:

init in class MMObjectBuilder

Returns:

true if init was completed, false if uncompleted.

See Also:

MMObjectBuilder.create()

createSource

public MMObjectNode createSource(MMObjectNode mediafragment,
                                 int status,
                                 int format,
                                 int speed,
                                 int channels,
                                 String url,
                                 String owner)

create a new mediasource, and relate it with specified mediafragment.

Parameters:

mediafragment - the media fragment to which this source belongs

status - of the media source

format - the format of the source (Real, Mp3)

channels - stereo/mono

url - the file name of the media source

owner - creator of the new object

Returns:

the new MediaSource

getURL

protected String getURL(MMObjectNode source,
                        Map info)

resolve the url of the mediasource. (e.g. pnm://www.mmbase.org/test/test.ra)

Parameters:

source - the media source

info - extra info (i.e. HttpRequestIno, bitrate, etc.)

Returns:

the url of the media source

getGUIIndicator

public String getGUIIndicator(MMObjectNode source)

used in the editors

Overrides:

getGUIIndicator in class MMObjectBuilder

Parameters:

source - The node to display

Returns:

the display of the node as a String

getSpeed

public int getSpeed(MMObjectNode node)

getChannels

public int getChannels(MMObjectNode node)

getFormat

protected Format getFormat(MMObjectNode source)

The format field is an integer, this function returns a string-presentation

getFormat

protected String getFormat(MMObjectNode source,
                           Map info)

getCodec

protected Codec getCodec(MMObjectNode source)

The codec field is an integer, this function returns a string-presentation

executeFunction

protected Object executeFunction(MMObjectNode node,
                                 String function,
                                 List args)

Executes a function on the field of a node, and returns the result. This method is called by the builder's MMObjectBuilder.getValue(org.mmbase.module.core.MMObjectNode, java.lang.String) method. Derived builders should override this method to provide additional functions.

Overrides:

executeFunction in class MMObjectBuilder

See Also:

MMObjectBuilder.executeFunction(org.mmbase.module.core.MMObjectNode, java.lang.String, java.util.List)

getURLs

protected List getURLs(MMObjectNode source,
                       MMObjectNode fragment,
                       Map info,
                       List urls,
                       Set cacheExpireObjects)

Returns all possible URLs for this source. (A source can be on different providers)

getFilteredURLs

protected List getFilteredURLs(MMObjectNode source,
                               MMObjectNode fragment,
                               Map info)

Returns all URLs for this source, but filtered, with the best ones on top.

addProvider

public void addProvider(MMObjectNode source,
                        String providername,
                        String owner)

relates a source with given provider. Only if there is one provider matching.

Parameters:

source - the media source.

providername - the name of the provider that is going to be related.

owner - the owner name that is creating the relation.

getProviders

protected List getProviders(MMObjectNode source)

get all mediaproviders belonging to this mediasource

Parameters:

source - the mediasource

Returns:

All mediaproviders related to the given mediasource

setValue

public boolean setValue(MMObjectNode node,
                        String fieldName,
                        Object value)

Description copied from class: MMObjectBuilder

Sets a key/value pair in the main values of this node. Note that if this node is a node in cache, the changes are immediately visible to everyone, even if the changes are not committed. The fieldname is added to the (public) 'changed' vector to track changes.

Overrides:

setValue in class MMObjectBuilder

Parameters:

fieldName - the name of the field to change

node - The node on which to change the field (the new value is in this node)

value - the value which was original in the field

Returns:

true When an update is required(when changed), false if original value was set back into the field.

commit

public boolean commit(MMObjectNode node)

The commit can be used to automaticly fill unfilled fields. For example the format can well be guessed by the URL. (todo: which of commit,insert must be overriden?)

Overrides:

commit in class MMObjectBuilder

Parameters:

node - The node to be committed

Returns:

true if commit successful

insert

public int insert(String owner,
                  MMObjectNode node)

Description copied from class: MMObjectBuilder

Insert a new object (content provided) in the cloud, including an entry for the object alias (if provided). This method indirectly calls MMObjectBuilder.preCommit(org.mmbase.module.core.MMObjectNode).

Overrides:

insert in class MMObjectBuilder

Parameters:

owner - The administrator creating the node

node - The object to insert. The object need be of the same type as the current builder.

Returns:

An int value which is the new object's unique number, -1 if the insert failed.