下面列出了java.awt.datatransfer.DataFlavor#isRepresentationClassInputStream ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Returns whether this flavor is a text type which does not support the
* 'charset' parameter.
*/
public static boolean isFlavorNoncharsetTextType(DataFlavor flavor) {
if (!"text".equals(flavor.getPrimaryType()) ||
doesSubtypeSupportCharset(flavor))
{
return false;
}
return (flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
DataTransferer.byteArrayClass.
equals(flavor.getRepresentationClass()));
}
/**
* Returns whether this flavor is a text type which does not support the
* 'charset' parameter.
*/
public static boolean isFlavorNoncharsetTextType(DataFlavor flavor) {
if (!"text".equals(flavor.getPrimaryType()) ||
doesSubtypeSupportCharset(flavor))
{
return false;
}
return (flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
DataTransferer.byteArrayClass.
equals(flavor.getRepresentationClass()));
}
/**
* Returns a Set of all DataFlavors for which
* 1) a mapping from at least one of the specified formats exists in the
* specified map and
* 2) the data translation for this mapping can be performed by the data
* transfer subsystem.
*
* @param formats the data formats
* @param map the FlavorTable which contains mappings between
* DataFlavors and data formats
* @throws NullPointerException if formats or map is <code>null</code>
*/
public Set getFlavorsForFormatsAsSet(long[] formats, FlavorTable map) {
Set flavorSet = new HashSet(formats.length);
for (int i = 0; i < formats.length; i++) {
String nat = getNativeForFormat(formats[i]);
List flavors = map.getFlavorsForNative(nat);
for (Iterator iter = flavors.iterator(); iter.hasNext(); ) {
DataFlavor flavor = (DataFlavor)iter.next();
// Don't explicitly test for String, since it is just a special
// case of Serializable
if (flavor.isFlavorTextType() ||
flavor.isFlavorJavaFileListType() ||
DataFlavor.imageFlavor.equals(flavor) ||
flavor.isRepresentationClassSerializable() ||
flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassRemote())
{
flavorSet.add(flavor);
}
}
}
return flavorSet;
}
/**
* Returns a Set of all DataFlavors for which
* 1) a mapping from at least one of the specified formats exists in the
* specified map and
* 2) the data translation for this mapping can be performed by the data
* transfer subsystem.
*
* @param formats the data formats
* @param map the FlavorTable which contains mappings between
* DataFlavors and data formats
* @throws NullPointerException if formats or map is <code>null</code>
*/
public Set getFlavorsForFormatsAsSet(long[] formats, FlavorTable map) {
Set flavorSet = new HashSet(formats.length);
for (int i = 0; i < formats.length; i++) {
String nat = getNativeForFormat(formats[i]);
List flavors = map.getFlavorsForNative(nat);
for (Iterator iter = flavors.iterator(); iter.hasNext(); ) {
DataFlavor flavor = (DataFlavor)iter.next();
// Don't explicitly test for String, since it is just a special
// case of Serializable
if (flavor.isFlavorTextType() ||
flavor.isFlavorJavaFileListType() ||
DataFlavor.imageFlavor.equals(flavor) ||
flavor.isRepresentationClassSerializable() ||
flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassRemote())
{
flavorSet.add(flavor);
}
}
}
return flavorSet;
}
/**
* Returns whether this flavor is a text type which supports the
* 'charset' parameter.
*/
public static boolean isFlavorCharsetTextType(DataFlavor flavor) {
// Although stringFlavor doesn't actually support the charset
// parameter (because its primary MIME type is not "text"), it should
// be treated as though it does. stringFlavor is semantically
// equivalent to "text/plain" data.
if (DataFlavor.stringFlavor.equals(flavor)) {
return true;
}
if (!"text".equals(flavor.getPrimaryType()) ||
!doesSubtypeSupportCharset(flavor))
{
return false;
}
Class rep_class = flavor.getRepresentationClass();
if (flavor.isRepresentationClassReader() ||
String.class.equals(rep_class) ||
flavor.isRepresentationClassCharBuffer() ||
char[].class.equals(rep_class))
{
return true;
}
if (!(flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
byte[].class.equals(rep_class))) {
return false;
}
String charset = flavor.getParameter("charset");
return (charset != null)
? DataTransferer.isEncodingSupported(charset)
: true; // null equals default encoding which is always supported
}
/**
* Returns a Set of all DataFlavors for which
* 1) a mapping from at least one of the specified formats exists in the
* specified map and
* 2) the data translation for this mapping can be performed by the data
* transfer subsystem.
*
* @param formats the data formats
* @param map the FlavorTable which contains mappings between
* DataFlavors and data formats
* @throws NullPointerException if formats or map is <code>null</code>
*/
public Set getFlavorsForFormatsAsSet(long[] formats, FlavorTable map) {
Set flavorSet = new HashSet(formats.length);
for (int i = 0; i < formats.length; i++) {
String nat = getNativeForFormat(formats[i]);
List flavors = map.getFlavorsForNative(nat);
for (Iterator iter = flavors.iterator(); iter.hasNext(); ) {
DataFlavor flavor = (DataFlavor)iter.next();
// Don't explicitly test for String, since it is just a special
// case of Serializable
if (flavor.isFlavorTextType() ||
flavor.isFlavorJavaFileListType() ||
DataFlavor.imageFlavor.equals(flavor) ||
flavor.isRepresentationClassSerializable() ||
flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassRemote())
{
flavorSet.add(flavor);
}
}
}
return flavorSet;
}
/**
* Returns whether this flavor is a text type which does not support the
* 'charset' parameter.
*/
public static boolean isFlavorNoncharsetTextType(DataFlavor flavor) {
if (!"text".equals(flavor.getPrimaryType()) ||
doesSubtypeSupportCharset(flavor))
{
return false;
}
return (flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
byte[].class.equals(flavor.getRepresentationClass()));
}
/**
* Returns a Set of all DataFlavors for which
* 1) a mapping from at least one of the specified formats exists in the
* specified map and
* 2) the data translation for this mapping can be performed by the data
* transfer subsystem.
*
* @param formats the data formats
* @param map the FlavorTable which contains mappings between
* DataFlavors and data formats
* @throws NullPointerException if formats or map is <code>null</code>
*/
public Set getFlavorsForFormatsAsSet(long[] formats, FlavorTable map) {
Set flavorSet = new HashSet(formats.length);
for (int i = 0; i < formats.length; i++) {
String nat = getNativeForFormat(formats[i]);
List flavors = map.getFlavorsForNative(nat);
for (Iterator iter = flavors.iterator(); iter.hasNext(); ) {
DataFlavor flavor = (DataFlavor)iter.next();
// Don't explicitly test for String, since it is just a special
// case of Serializable
if (flavor.isFlavorTextType() ||
flavor.isFlavorJavaFileListType() ||
DataFlavor.imageFlavor.equals(flavor) ||
flavor.isRepresentationClassSerializable() ||
flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassRemote())
{
flavorSet.add(flavor);
}
}
}
return flavorSet;
}
/**
* Returns whether this flavor is a text type which supports the
* 'charset' parameter.
*/
public static boolean isFlavorCharsetTextType(DataFlavor flavor) {
// Although stringFlavor doesn't actually support the charset
// parameter (because its primary MIME type is not "text"), it should
// be treated as though it does. stringFlavor is semantically
// equivalent to "text/plain" data.
if (DataFlavor.stringFlavor.equals(flavor)) {
return true;
}
if (!"text".equals(flavor.getPrimaryType()) ||
!doesSubtypeSupportCharset(flavor))
{
return false;
}
Class rep_class = flavor.getRepresentationClass();
if (flavor.isRepresentationClassReader() ||
String.class.equals(rep_class) ||
flavor.isRepresentationClassCharBuffer() ||
char[].class.equals(rep_class))
{
return true;
}
if (!(flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
byte[].class.equals(rep_class))) {
return false;
}
String charset = flavor.getParameter("charset");
return (charset != null)
? DataTransferer.isEncodingSupported(charset)
: true; // null equals default encoding which is always supported
}
/**
* Returns a Set of all DataFlavors for which
* 1) a mapping from at least one of the specified formats exists in the
* specified map and
* 2) the data translation for this mapping can be performed by the data
* transfer subsystem.
*
* @param formats the data formats
* @param map the FlavorTable which contains mappings between
* DataFlavors and data formats
* @throws NullPointerException if formats or map is <code>null</code>
*/
public Set getFlavorsForFormatsAsSet(long[] formats, FlavorTable map) {
Set flavorSet = new HashSet(formats.length);
for (int i = 0; i < formats.length; i++) {
String nat = getNativeForFormat(formats[i]);
List flavors = map.getFlavorsForNative(nat);
for (Iterator iter = flavors.iterator(); iter.hasNext(); ) {
DataFlavor flavor = (DataFlavor)iter.next();
// Don't explicitly test for String, since it is just a special
// case of Serializable
if (flavor.isFlavorTextType() ||
flavor.isFlavorJavaFileListType() ||
DataFlavor.imageFlavor.equals(flavor) ||
flavor.isRepresentationClassSerializable() ||
flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassRemote())
{
flavorSet.add(flavor);
}
}
}
return flavorSet;
}
/**
* Returns whether this flavor is a text type which supports the
* 'charset' parameter.
*/
public static boolean isFlavorCharsetTextType(DataFlavor flavor) {
// Although stringFlavor doesn't actually support the charset
// parameter (because its primary MIME type is not "text"), it should
// be treated as though it does. stringFlavor is semantically
// equivalent to "text/plain" data.
if (DataFlavor.stringFlavor.equals(flavor)) {
return true;
}
if (!"text".equals(flavor.getPrimaryType()) ||
!doesSubtypeSupportCharset(flavor))
{
return false;
}
Class rep_class = flavor.getRepresentationClass();
if (flavor.isRepresentationClassReader() ||
String.class.equals(rep_class) ||
flavor.isRepresentationClassCharBuffer() ||
char[].class.equals(rep_class))
{
return true;
}
if (!(flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
byte[].class.equals(rep_class))) {
return false;
}
String charset = flavor.getParameter("charset");
return (charset != null)
? DataTransferer.isEncodingSupported(charset)
: true; // null equals default encoding which is always supported
}
/**
* Returns whether this flavor is a text type which does not support the
* 'charset' parameter.
*/
public static boolean isFlavorNoncharsetTextType(DataFlavor flavor) {
if (!"text".equals(flavor.getPrimaryType()) ||
doesSubtypeSupportCharset(flavor))
{
return false;
}
return (flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
byte[].class.equals(flavor.getRepresentationClass()));
}
/**
* Returns whether this flavor is a text type which does not support the
* 'charset' parameter.
*/
public static boolean isFlavorNoncharsetTextType(DataFlavor flavor) {
if (!"text".equals(flavor.getPrimaryType()) ||
doesSubtypeSupportCharset(flavor))
{
return false;
}
return (flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
byte[].class.equals(flavor.getRepresentationClass()));
}
public LinkedHashSet<String> getPlatformMappingsForFlavor(DataFlavor df) {
LinkedHashSet<String> natives = new LinkedHashSet<>(1);
if (df == null) {
return natives;
}
String charset = df.getParameter("charset");
String baseType = df.getPrimaryType() + "/" + df.getSubType();
String mimeType = baseType;
if (charset != null && DataTransferer.isFlavorCharsetTextType(df)) {
mimeType += ";charset=" + charset;
}
// Add a mapping to the MIME native whenever the representation class
// doesn't require translation.
if (df.getRepresentationClass() != null &&
(df.isRepresentationClassInputStream() ||
df.isRepresentationClassByteBuffer() ||
byte[].class.equals(df.getRepresentationClass()))) {
natives.add(mimeType);
}
if (DataFlavor.imageFlavor.equals(df)) {
String[] mimeTypes = ImageIO.getWriterMIMETypes();
if (mimeTypes != null) {
for (int i = 0; i < mimeTypes.length; i++) {
Iterator writers =
ImageIO.getImageWritersByMIMEType(mimeTypes[i]);
while (writers.hasNext()) {
ImageWriter imageWriter = (ImageWriter)writers.next();
ImageWriterSpi writerSpi =
imageWriter.getOriginatingProvider();
if (writerSpi != null &&
writerSpi.canEncodeImage(getDefaultImageTypeSpecifier())) {
natives.add(mimeTypes[i]);
break;
}
}
}
}
} else if (DataTransferer.isFlavorCharsetTextType(df)) {
// stringFlavor is semantically equivalent to the standard
// "text/plain" MIME type.
if (DataFlavor.stringFlavor.equals(df)) {
baseType = "text/plain";
}
for (String encoding : DataTransferer.standardEncodings()) {
if (!encoding.equals(charset)) {
natives.add(baseType + ";charset=" + encoding);
}
}
// Add a MIME format without specified charset.
if (!natives.contains(baseType)) {
natives.add(baseType);
}
}
return natives;
}
/**
* Returns a Map whose keys are all of the possible formats into which data
* in the specified DataFlavors can be translated. The value of each key
* is the DataFlavor in which the Transferable's data should be requested
* when converting to the format.
* <p>
* The map keys are sorted according to the native formats preference
* order.
*
* @param flavors the data flavors
* @param map the FlavorTable which contains mappings between
* DataFlavors and data formats
* @throws NullPointerException if flavors or map is <code>null</code>
*/
public SortedMap <Long, DataFlavor> getFormatsForFlavors(
DataFlavor[] flavors, FlavorTable map)
{
Map <Long,DataFlavor> formatMap =
new HashMap <> (flavors.length);
Map <Long,DataFlavor> textPlainMap =
new HashMap <> (flavors.length);
// Maps formats to indices that will be used to sort the formats
// according to the preference order.
// Larger index value corresponds to the more preferable format.
Map indexMap = new HashMap(flavors.length);
Map textPlainIndexMap = new HashMap(flavors.length);
int currentIndex = 0;
// Iterate backwards so that preferred DataFlavors are used over
// other DataFlavors. (See javadoc for
// Transferable.getTransferDataFlavors.)
for (int i = flavors.length - 1; i >= 0; i--) {
DataFlavor flavor = flavors[i];
if (flavor == null) continue;
// Don't explicitly test for String, since it is just a special
// case of Serializable
if (flavor.isFlavorTextType() ||
flavor.isFlavorJavaFileListType() ||
DataFlavor.imageFlavor.equals(flavor) ||
flavor.isRepresentationClassSerializable() ||
flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassRemote())
{
List natives = map.getNativesForFlavor(flavor);
currentIndex += natives.size();
for (Iterator iter = natives.iterator(); iter.hasNext(); ) {
Long lFormat =
getFormatForNativeAsLong((String)iter.next());
Integer index = Integer.valueOf(currentIndex--);
formatMap.put(lFormat, flavor);
indexMap.put(lFormat, index);
// SystemFlavorMap.getNativesForFlavor will return
// text/plain natives for all text/*. While this is good
// for a single text/* flavor, we would prefer that
// text/plain native data come from a text/plain flavor.
if (("text".equals(flavor.getPrimaryType()) &&
"plain".equals(flavor.getSubType())) ||
flavor.equals(DataFlavor.stringFlavor))
{
textPlainMap.put(lFormat, flavor);
textPlainIndexMap.put(lFormat, index);
}
}
currentIndex += natives.size();
}
}
formatMap.putAll(textPlainMap);
indexMap.putAll(textPlainIndexMap);
// Sort the map keys according to the formats preference order.
Comparator comparator =
new IndexOrderComparator(indexMap, IndexedComparator.SELECT_WORST);
SortedMap sortedMap = new TreeMap(comparator);
sortedMap.putAll(formatMap);
return sortedMap;
}
/**
* Returns a Map whose keys are all of the possible formats into which data
* in the specified DataFlavors can be translated. The value of each key
* is the DataFlavor in which the Transferable's data should be requested
* when converting to the format.
* <p>
* The map keys are sorted according to the native formats preference
* order.
*
* @param flavors the data flavors
* @param map the FlavorTable which contains mappings between
* DataFlavors and data formats
* @throws NullPointerException if flavors or map is <code>null</code>
*/
public SortedMap <Long, DataFlavor> getFormatsForFlavors(
DataFlavor[] flavors, FlavorTable map)
{
Map <Long,DataFlavor> formatMap =
new HashMap <> (flavors.length);
Map <Long,DataFlavor> textPlainMap =
new HashMap <> (flavors.length);
// Maps formats to indices that will be used to sort the formats
// according to the preference order.
// Larger index value corresponds to the more preferable format.
Map indexMap = new HashMap(flavors.length);
Map textPlainIndexMap = new HashMap(flavors.length);
int currentIndex = 0;
// Iterate backwards so that preferred DataFlavors are used over
// other DataFlavors. (See javadoc for
// Transferable.getTransferDataFlavors.)
for (int i = flavors.length - 1; i >= 0; i--) {
DataFlavor flavor = flavors[i];
if (flavor == null) continue;
// Don't explicitly test for String, since it is just a special
// case of Serializable
if (flavor.isFlavorTextType() ||
flavor.isFlavorJavaFileListType() ||
DataFlavor.imageFlavor.equals(flavor) ||
flavor.isRepresentationClassSerializable() ||
flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassRemote())
{
List natives = map.getNativesForFlavor(flavor);
currentIndex += natives.size();
for (Iterator iter = natives.iterator(); iter.hasNext(); ) {
Long lFormat =
getFormatForNativeAsLong((String)iter.next());
Integer index = Integer.valueOf(currentIndex--);
formatMap.put(lFormat, flavor);
indexMap.put(lFormat, index);
// SystemFlavorMap.getNativesForFlavor will return
// text/plain natives for all text/*. While this is good
// for a single text/* flavor, we would prefer that
// text/plain native data come from a text/plain flavor.
if (("text".equals(flavor.getPrimaryType()) &&
"plain".equals(flavor.getSubType())) ||
flavor.equals(DataFlavor.stringFlavor))
{
textPlainMap.put(lFormat, flavor);
textPlainIndexMap.put(lFormat, index);
}
}
currentIndex += natives.size();
}
}
formatMap.putAll(textPlainMap);
indexMap.putAll(textPlainIndexMap);
// Sort the map keys according to the formats preference order.
Comparator comparator =
new IndexOrderComparator(indexMap, IndexedComparator.SELECT_WORST);
SortedMap sortedMap = new TreeMap(comparator);
sortedMap.putAll(formatMap);
return sortedMap;
}
@Override
public LinkedHashSet<String> getPlatformMappingsForFlavor(DataFlavor df) {
LinkedHashSet<String> natives = new LinkedHashSet<>(1);
if (df == null) {
return natives;
}
String charset = df.getParameter("charset");
String baseType = df.getPrimaryType() + "/" + df.getSubType();
String mimeType = baseType;
if (charset != null && DataFlavorUtil.isFlavorCharsetTextType(df)) {
mimeType += ";charset=" + charset;
}
// Add a mapping to the MIME native whenever the representation class
// doesn't require translation.
if (df.getRepresentationClass() != null &&
(df.isRepresentationClassInputStream() ||
df.isRepresentationClassByteBuffer() ||
byte[].class.equals(df.getRepresentationClass()))) {
natives.add(mimeType);
}
if (DataFlavor.imageFlavor.equals(df)) {
String[] mimeTypes = ImageIO.getWriterMIMETypes();
if (mimeTypes != null) {
for (String mime : mimeTypes) {
Iterator<ImageWriter> writers = ImageIO.getImageWritersByMIMEType(mime);
while (writers.hasNext()) {
ImageWriter imageWriter = writers.next();
ImageWriterSpi writerSpi = imageWriter.getOriginatingProvider();
if (writerSpi != null &&
writerSpi.canEncodeImage(getDefaultImageTypeSpecifier())) {
natives.add(mime);
break;
}
}
}
}
} else if (DataFlavorUtil.isFlavorCharsetTextType(df)) {
// stringFlavor is semantically equivalent to the standard
// "text/plain" MIME type.
if (DataFlavor.stringFlavor.equals(df)) {
baseType = "text/plain";
}
for (String encoding : DataFlavorUtil.standardEncodings()) {
if (!encoding.equals(charset)) {
natives.add(baseType + ";charset=" + encoding);
}
}
// Add a MIME format without specified charset.
if (!natives.contains(baseType)) {
natives.add(baseType);
}
}
return natives;
}
public LinkedHashSet<String> getPlatformMappingsForFlavor(DataFlavor df) {
LinkedHashSet<String> natives = new LinkedHashSet<>(1);
if (df == null) {
return natives;
}
String charset = df.getParameter("charset");
String baseType = df.getPrimaryType() + "/" + df.getSubType();
String mimeType = baseType;
if (charset != null && DataTransferer.isFlavorCharsetTextType(df)) {
mimeType += ";charset=" + charset;
}
// Add a mapping to the MIME native whenever the representation class
// doesn't require translation.
if (df.getRepresentationClass() != null &&
(df.isRepresentationClassInputStream() ||
df.isRepresentationClassByteBuffer() ||
byte[].class.equals(df.getRepresentationClass()))) {
natives.add(mimeType);
}
if (DataFlavor.imageFlavor.equals(df)) {
String[] mimeTypes = ImageIO.getWriterMIMETypes();
if (mimeTypes != null) {
for (int i = 0; i < mimeTypes.length; i++) {
Iterator writers =
ImageIO.getImageWritersByMIMEType(mimeTypes[i]);
while (writers.hasNext()) {
ImageWriter imageWriter = (ImageWriter)writers.next();
ImageWriterSpi writerSpi =
imageWriter.getOriginatingProvider();
if (writerSpi != null &&
writerSpi.canEncodeImage(getDefaultImageTypeSpecifier())) {
natives.add(mimeTypes[i]);
break;
}
}
}
}
} else if (DataTransferer.isFlavorCharsetTextType(df)) {
// stringFlavor is semantically equivalent to the standard
// "text/plain" MIME type.
if (DataFlavor.stringFlavor.equals(df)) {
baseType = "text/plain";
}
for (String encoding : DataTransferer.standardEncodings()) {
if (!encoding.equals(charset)) {
natives.add(baseType + ";charset=" + encoding);
}
}
// Add a MIME format without specified charset.
if (!natives.contains(baseType)) {
natives.add(baseType);
}
}
return natives;
}
public LinkedHashSet<String> getPlatformMappingsForFlavor(DataFlavor df) {
LinkedHashSet<String> natives = new LinkedHashSet<>(1);
if (df == null) {
return natives;
}
String charset = df.getParameter("charset");
String baseType = df.getPrimaryType() + "/" + df.getSubType();
String mimeType = baseType;
if (charset != null && DataTransferer.isFlavorCharsetTextType(df)) {
mimeType += ";charset=" + charset;
}
// Add a mapping to the MIME native whenever the representation class
// doesn't require translation.
if (df.getRepresentationClass() != null &&
(df.isRepresentationClassInputStream() ||
df.isRepresentationClassByteBuffer() ||
byte[].class.equals(df.getRepresentationClass()))) {
natives.add(mimeType);
}
if (DataFlavor.imageFlavor.equals(df)) {
String[] mimeTypes = ImageIO.getWriterMIMETypes();
if (mimeTypes != null) {
for (int i = 0; i < mimeTypes.length; i++) {
Iterator writers =
ImageIO.getImageWritersByMIMEType(mimeTypes[i]);
while (writers.hasNext()) {
ImageWriter imageWriter = (ImageWriter)writers.next();
ImageWriterSpi writerSpi =
imageWriter.getOriginatingProvider();
if (writerSpi != null &&
writerSpi.canEncodeImage(getDefaultImageTypeSpecifier())) {
natives.add(mimeTypes[i]);
break;
}
}
}
}
} else if (DataTransferer.isFlavorCharsetTextType(df)) {
// stringFlavor is semantically equivalent to the standard
// "text/plain" MIME type.
if (DataFlavor.stringFlavor.equals(df)) {
baseType = "text/plain";
}
for (String encoding : DataTransferer.standardEncodings()) {
if (!encoding.equals(charset)) {
natives.add(baseType + ";charset=" + encoding);
}
}
// Add a MIME format without specified charset.
if (!natives.contains(baseType)) {
natives.add(baseType);
}
}
return natives;
}
/**
* Returns a Map whose keys are all of the possible formats into which data
* in the specified DataFlavors can be translated. The value of each key
* is the DataFlavor in which the Transferable's data should be requested
* when converting to the format.
* <p>
* The map keys are sorted according to the native formats preference
* order.
*
* @param flavors the data flavors
* @param map the FlavorTable which contains mappings between
* DataFlavors and data formats
* @throws NullPointerException if flavors or map is <code>null</code>
*/
public SortedMap <Long, DataFlavor> getFormatsForFlavors(
DataFlavor[] flavors, FlavorTable map)
{
Map <Long,DataFlavor> formatMap =
new HashMap <> (flavors.length);
Map <Long,DataFlavor> textPlainMap =
new HashMap <> (flavors.length);
// Maps formats to indices that will be used to sort the formats
// according to the preference order.
// Larger index value corresponds to the more preferable format.
Map indexMap = new HashMap(flavors.length);
Map textPlainIndexMap = new HashMap(flavors.length);
int currentIndex = 0;
// Iterate backwards so that preferred DataFlavors are used over
// other DataFlavors. (See javadoc for
// Transferable.getTransferDataFlavors.)
for (int i = flavors.length - 1; i >= 0; i--) {
DataFlavor flavor = flavors[i];
if (flavor == null) continue;
// Don't explicitly test for String, since it is just a special
// case of Serializable
if (flavor.isFlavorTextType() ||
flavor.isFlavorJavaFileListType() ||
DataFlavor.imageFlavor.equals(flavor) ||
flavor.isRepresentationClassSerializable() ||
flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassRemote())
{
List natives = map.getNativesForFlavor(flavor);
currentIndex += natives.size();
for (Iterator iter = natives.iterator(); iter.hasNext(); ) {
Long lFormat =
getFormatForNativeAsLong((String)iter.next());
Integer index = Integer.valueOf(currentIndex--);
formatMap.put(lFormat, flavor);
indexMap.put(lFormat, index);
// SystemFlavorMap.getNativesForFlavor will return
// text/plain natives for all text/*. While this is good
// for a single text/* flavor, we would prefer that
// text/plain native data come from a text/plain flavor.
if (("text".equals(flavor.getPrimaryType()) &&
"plain".equals(flavor.getSubType())) ||
flavor.equals(DataFlavor.stringFlavor))
{
textPlainMap.put(lFormat, flavor);
textPlainIndexMap.put(lFormat, index);
}
}
currentIndex += natives.size();
}
}
formatMap.putAll(textPlainMap);
indexMap.putAll(textPlainIndexMap);
// Sort the map keys according to the formats preference order.
Comparator comparator =
new IndexOrderComparator(indexMap, IndexedComparator.SELECT_WORST);
SortedMap sortedMap = new TreeMap(comparator);
sortedMap.putAll(formatMap);
return sortedMap;
}