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com.ibm.portal.resolver.data
Interface DataSource

All Superinterfaces:

Addressable, DataSourceFragment, Disposable, TimeStamped

All Known Subinterfaces:

ByteDataSource, CacheControlDataSource, CachedDataSourceFactory.UncacheableValue<T>, CachedDataSourceFactory.Value<T>, CharDataSource, ContentDispositionDataSource, ContentLengthDataSource, ConvertibleDataSource, DataSourceChecksum, JsonDataSource, MultipartDataSource, ProjectContextDataSource, RedirectDataSource, StatusCodeDataSource, UserContextDataSource, VaryDataSource, VirtualPortalContextDataSource, XmlDataSource

All Known Implementing Classes:

AbstractDataSource, AbstractStaticDataSource, DefaultDataSource, EarlyBindingDataSource

public interface DataSource
extends Addressable, TimeStamped, Disposable, DataSourceFragment

Base interface implemented by all data sources, independent on their actual stream type. This interface captures the metadata of the data source.

The assumption is that the metadata is constant across the lifetime of the DataSource, i.e. calling any of the methods multiple times must always return the same result.

The DataSource implementor may implement additional interfaces to describe properties of the data.

Format

• ByteDataSource
• CharDataSource
• XmlDataSource
• JsonDataSource
• MultipartDataSource

Caching

• CacheControlDataSource
• UserContextDataSource
• ProjectContextDataSource
• VirtualPortalContextDataSource
• VaryDataSource
• DataSourceChecksum

Additional properties

• ContentDispositionDataSource
• ContentLengthDataSource
• StatusCodeDataSource

Since:

6.1.0

Note:

This interface is designed to be implemented by clients.

Field Summary
static java.lang.String	CONTENT_TYPE_UNKNOWN           Indicates an unknown content type
static java.util.Date	CREATION_UNKNOWN           Indicates an unknown creation date
static java.util.Date	EXPIRATION_UNKNOWN           Indicates an unknown expiration
static java.util.Date	LAST_MODIFICATION_UNKNOWN           Indicates an unknown last modified date
static long	MAX_AGE_INFINITE           Timespan for "infinite" lifetime in [ms], per default set to one (tropical) year
static long	MAX_AGE_NONE           Timespan for immediate expiry in [ms]
static java.util.Date	ROOT_DATE           The earliest representable date.

 

Fields inherited from interface com.ibm.portal.resolver.data.Addressable

EMPTY_PARAMETERS

 

Method Summary
java.lang.String	getContentType()           Mime type of the data.
java.util.Date	getCreated()           Return the creation date of the resource.
java.util.Date	getExpiration()           Absolute timestamp that indicates the time when the data represented by the source will expire.
java.util.Date	getLastModified()           Return the modification date of the resource.

 

Methods inherited from interface com.ibm.portal.resolver.data.Addressable

getParameters, getURI

 

Methods inherited from interface com.ibm.portal.Disposable

dispose

 

Field Detail

CONTENT_TYPE_UNKNOWN

static final java.lang.String CONTENT_TYPE_UNKNOWN

Indicates an unknown content type

Since:

7.0

CREATION_UNKNOWN

static final java.util.Date CREATION_UNKNOWN

Indicates an unknown creation date

Since:

7.0

EXPIRATION_UNKNOWN

static final java.util.Date EXPIRATION_UNKNOWN

Indicates an unknown expiration

Since:

6.1.0.3

LAST_MODIFICATION_UNKNOWN

static final java.util.Date LAST_MODIFICATION_UNKNOWN

Indicates an unknown last modified date

Since:

7.0

MAX_AGE_INFINITE

static final long MAX_AGE_INFINITE

Timespan for "infinite" lifetime in [ms], per default set to one (tropical) year

Since:

7.0.0.2

See Also:

Constant Field Values

MAX_AGE_NONE

static final long MAX_AGE_NONE

Timespan for immediate expiry in [ms]

Since:

7.0.0.2

See Also:

Constant Field Values

ROOT_DATE

static final java.util.Date ROOT_DATE

The earliest representable date. This would e.g. be used to describe the creation or last modification date of a data source that only contains computed information, without more current dependencies.

Since:

7.0.0.2

Method Detail

getContentType

java.lang.String getContentType()

Mime type of the data. The return value must be a registered mime type or CONTENT_TYPE_UNKNOWN. A value of CONTENT_TYPE_UNKNOWN means that the data source does not contain any content.

Returns:

mime type string, or CONTENT_TYPE_UNKNOWN if the data source does not represent content

getCreated

java.util.Date getCreated()

Returns the creation date of the resource.

Specified by:

getCreated in interface TimeStamped

Returns:

the creation dateor CREATION_UNKNOWN

getExpiration

java.util.Date getExpiration()

Absolute timestamp that indicates the time when the data represented by the source will expire.

Specified by:

getExpiration in interface DataSourceFragment

Returns:

the date the data expires or EXPIRATION_UNKNOWN if the value is unknown

getLastModified

java.util.Date getLastModified()

Returns the modification date of the resource.

Specified by:

getLastModified in interface TimeStamped

Returns:

the modification date or LAST_MODIFICATION_UNKNOWN

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