SystemFlavorMap (Java Platform SE 6) (original) (raw)

java.awt.datatransfer

Class SystemFlavorMap

java.lang.Object java.awt.datatransfer.SystemFlavorMap

All Implemented Interfaces:

FlavorMap, FlavorTable

public final class SystemFlavorMap

extends Object

implements FlavorMap, FlavorTable

The SystemFlavorMap is a configurable map between "natives" (Strings), which correspond to platform-specific data formats, and "flavors" (DataFlavors), which correspond to platform-independent MIME types. This mapping is used by the data transfer subsystem to transfer data between Java and native applications, and between Java applications in separate VMs.

In the Sun reference implementation, the default SystemFlavorMap is initialized by the file jre/lib/flavormap.properties and the contents of the URL referenced by the AWT propertyAWT.DnD.flavorMapFileURL. See flavormap.properties for details.

Since:

1.2

getDefaultFlavorMap

public static FlavorMap getDefaultFlavorMap()

Returns the default FlavorMap for this thread's ClassLoader.

getNativesForFlavor

public List<String> getNativesForFlavor(DataFlavor flav)

Returns a List of String natives to which the specified DataFlavor can be translated by the data transfer subsystem. The List will be sorted from best native to worst. That is, the first native will best reflect data in the specified flavor to the underlying native platform.

If the specified DataFlavor is previously unknown to the data transfer subsystem and the data transfer subsystem is unable to translate this DataFlavor to any existing native, then invoking this method will establish a mapping in both directions between the specified DataFlavor and an encoded version of its MIME type as its native.

Specified by:

[getNativesForFlavor](../../../java/awt/datatransfer/FlavorTable.html#getNativesForFlavor%28java.awt.datatransfer.DataFlavor%29) in interface [FlavorTable](../../../java/awt/datatransfer/FlavorTable.html "interface in java.awt.datatransfer")

Parameters:

flav - the DataFlavor whose corresponding natives should be returned. If null is specified, all natives currently known to the data transfer subsystem are returned in a non-deterministic order.

Returns:

a java.util.List of java.lang.String objects which are platform-specific representations of platform- specific data formats

Since:

1.4

See Also:

encodeDataFlavor(java.awt.datatransfer.DataFlavor)

getFlavorsForNative

public List<DataFlavor> getFlavorsForNative(String nat)

Returns a List of DataFlavors to which the specified String native can be translated by the data transfer subsystem. The List will be sorted from bestDataFlavor to worst. That is, the firstDataFlavor will best reflect data in the specified native to a Java application.

If the specified native is previously unknown to the data transfer subsystem, and that native has been properly encoded, then invoking this method will establish a mapping in both directions between the specified native and a DataFlavor whose MIME type is a decoded version of the native.

If the specified native is not a properly encoded native and the mappings for this native have not been altered withsetFlavorsForNative, then the contents of theList is platform dependent, but null cannot be returned.

Specified by:

[getFlavorsForNative](../../../java/awt/datatransfer/FlavorTable.html#getFlavorsForNative%28java.lang.String%29) in interface [FlavorTable](../../../java/awt/datatransfer/FlavorTable.html "interface in java.awt.datatransfer")

Parameters:

nat - the native whose corresponding DataFlavors should be returned. If null is specified, allDataFlavors currently known to the data transfer subsystem are returned in a non-deterministic order.

Returns:

a java.util.List of DataFlavor objects into which platform-specific data in the specified, platform-specific native can be translated

Since:

1.4

See Also:

encodeJavaMIMEType(java.lang.String)

getNativesForFlavors

public Map<DataFlavor,String> getNativesForFlavors(DataFlavor[] flavors)

Returns a Map of the specified DataFlavors to their most preferred String native. Each native value will be the same as the first native in the List returned bygetNativesForFlavor for the specified flavor.

If a specified DataFlavor is previously unknown to the data transfer subsystem, then invoking this method will establish a mapping in both directions between the specified DataFlavor and an encoded version of its MIME type as its native.

Specified by:

[getNativesForFlavors](../../../java/awt/datatransfer/FlavorMap.html#getNativesForFlavors%28java.awt.datatransfer.DataFlavor[]%29) in interface [FlavorMap](../../../java/awt/datatransfer/FlavorMap.html "interface in java.awt.datatransfer")

Parameters:

flavors - an array of DataFlavors which will be the key set of the returned Map. If null is specified, a mapping of all DataFlavors known to the data transfer subsystem to their most preferred String natives will be returned.

Returns:

a java.util.Map of DataFlavors toString natives

See Also:

getNativesForFlavor(java.awt.datatransfer.DataFlavor), encodeDataFlavor(java.awt.datatransfer.DataFlavor)

getFlavorsForNatives

public Map<String,DataFlavor> getFlavorsForNatives(String[] natives)

Returns a Map of the specified String natives to their most preferred DataFlavor. EachDataFlavor value will be the same as the firstDataFlavor in the List returned bygetFlavorsForNative for the specified native.

If a specified native is previously unknown to the data transfer subsystem, and that native has been properly encoded, then invoking this method will establish a mapping in both directions between the specified native and a DataFlavor whose MIME type is a decoded version of the native.

Specified by:

[getFlavorsForNatives](../../../java/awt/datatransfer/FlavorMap.html#getFlavorsForNatives%28java.lang.String[]%29) in interface [FlavorMap](../../../java/awt/datatransfer/FlavorMap.html "interface in java.awt.datatransfer")

Parameters:

natives - an array of Strings which will be the key set of the returned Map. If null is specified, a mapping of all supported String natives to their most preferred DataFlavors will be returned.

Returns:

a java.util.Map of String natives toDataFlavors

See Also:

getFlavorsForNative(java.lang.String), encodeJavaMIMEType(java.lang.String)

addUnencodedNativeForFlavor

public void addUnencodedNativeForFlavor(DataFlavor flav, String nat)

Adds a mapping from the specified DataFlavor (and allDataFlavors equal to the specified DataFlavor) to the specified String native. Unlike getNativesForFlavor, the mapping will only be established in one direction, and the native will not be encoded. To establish a two-way mapping, calladdFlavorForUnencodedNative as well. The new mapping will be of lower priority than any existing mapping. This method has no effect if a mapping from the specified or equalDataFlavor to the specified String native already exists.

Parameters:

flav - the DataFlavor key for the mapping

nat - the String native value for the mapping

Throws:

[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang") - if flav or nat is null

Since:

1.4

See Also:

[addFlavorForUnencodedNative(java.lang.String, java.awt.datatransfer.DataFlavor)](../../../java/awt/datatransfer/SystemFlavorMap.html#addFlavorForUnencodedNative%28java.lang.String, java.awt.datatransfer.DataFlavor%29)

setNativesForFlavor

public void setNativesForFlavor(DataFlavor flav, String[] natives)

Discards the current mappings for the specified DataFlavor and all DataFlavors equal to the specifiedDataFlavor, and creates new mappings to the specified String natives. Unlike getNativesForFlavor, the mappings will only be established in one direction, and the natives will not be encoded. To establish two-way mappings, call setFlavorsForNative as well. The first native in the array will represent the highest priority mapping. Subsequent natives will represent mappings of decreasing priority.

If the array contains several elements that reference equalString natives, this method will establish new mappings for the first of those elements and ignore the rest of them.

It is recommended that client code not reset mappings established by the data transfer subsystem. This method should only be used for application-level mappings.

Parameters:

flav - the DataFlavor key for the mappings

natives - the String native values for the mappings

Throws:

[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang") - if flav or natives is null or if natives contains null elements

Since:

1.4

See Also:

[setFlavorsForNative(java.lang.String, java.awt.datatransfer.DataFlavor[])](../../../java/awt/datatransfer/SystemFlavorMap.html#setFlavorsForNative%28java.lang.String, java.awt.datatransfer.DataFlavor[]%29)

addFlavorForUnencodedNative

public void addFlavorForUnencodedNative(String nat, DataFlavor flav)

Adds a mapping from a single String native to a singleDataFlavor. Unlike getFlavorsForNative, the mapping will only be established in one direction, and the native will not be encoded. To establish a two-way mapping, calladdUnencodedNativeForFlavor as well. The new mapping will be of lower priority than any existing mapping. This method has no effect if a mapping from the specifiedString native to the specified or equalDataFlavor already exists.

Parameters:

nat - the String native key for the mapping

flav - the DataFlavor value for the mapping

Throws:

[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang") - if nat or flav is null

Since:

1.4

See Also:

[addUnencodedNativeForFlavor(java.awt.datatransfer.DataFlavor, java.lang.String)](../../../java/awt/datatransfer/SystemFlavorMap.html#addUnencodedNativeForFlavor%28java.awt.datatransfer.DataFlavor, java.lang.String%29)

setFlavorsForNative

public void setFlavorsForNative(String nat, DataFlavor[] flavors)

Discards the current mappings for the specified String native, and creates new mappings to the specifiedDataFlavors. Unlike getFlavorsForNative, the mappings will only be established in one direction, and the natives need not be encoded. To establish two-way mappings, callsetNativesForFlavor as well. The firstDataFlavor in the array will represent the highest priority mapping. Subsequent DataFlavors will represent mappings of decreasing priority.

If the array contains several elements that reference equalDataFlavors, this method will establish new mappings for the first of those elements and ignore the rest of them.

It is recommended that client code not reset mappings established by the data transfer subsystem. This method should only be used for application-level mappings.

Parameters:

nat - the String native key for the mappings

flavors - the DataFlavor values for the mappings

Throws:

[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang") - if nat or flavors is null or if flavors contains null elements

Since:

1.4

See Also:

[setNativesForFlavor(java.awt.datatransfer.DataFlavor, java.lang.String[])](../../../java/awt/datatransfer/SystemFlavorMap.html#setNativesForFlavor%28java.awt.datatransfer.DataFlavor, java.lang.String[]%29)

encodeJavaMIMEType

public static String encodeJavaMIMEType(String mimeType)

Encodes a MIME type for use as a String native. The format of an encoded representation of a MIME type is implementation-dependent. The only restrictions are:

• The encoded representation is null if and only if the MIME type String is null.
• The encoded representations for two non-null MIME typeStrings are equal if and only if these Strings are equal according to String.equals(Object).

Sun's reference implementation of this method returns the specified MIME type String prefixed with JAVA_DATAFLAVOR:.

Parameters:

mimeType - the MIME type to encode

Returns:

the encoded String, or null if mimeType is null

encodeDataFlavor

public static String encodeDataFlavor(DataFlavor flav)

Encodes a DataFlavor for use as a String native. The format of an encoded DataFlavor is implementation-dependent. The only restrictions are:

• The encoded representation is null if and only if the specified DataFlavor is null or its MIME typeString is null.
• The encoded representations for two non-null DataFlavors with non-null MIME typeStrings are equal if and only if the MIME typeStrings of these DataFlavors are equal according to String.equals(Object).

Sun's reference implementation of this method returns the MIME typeString of the specified DataFlavor prefixed with JAVA_DATAFLAVOR:.

Parameters:

flav - the DataFlavor to encode

Returns:

the encoded String, or null if flav is null or has a null MIME type

isJavaMIMEType

public static boolean isJavaMIMEType(String str)

Returns whether the specified String is an encoded Java MIME type.

Parameters:

str - the String to test

Returns:

true if the String is encoded;false otherwise

decodeJavaMIMEType

public static String decodeJavaMIMEType(String nat)

Decodes a String native for use as a Java MIME type.

Parameters:

nat - the String to decode

Returns:

the decoded Java MIME type, or null if nat is not an encoded String native

decodeDataFlavor

public static DataFlavor decodeDataFlavor(String nat) throws ClassNotFoundException

Decodes a String native for use as aDataFlavor.

Parameters:

nat - the String to decode

Returns:

the decoded DataFlavor, or null if nat is not an encoded String native

Throws:

[ClassNotFoundException](../../../java/lang/ClassNotFoundException.html "class in java.lang")

Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright © 1993, 2015, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.

Scripting on this page tracks web page traffic, but does not change the content in any way.