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package javax.imageio; |
package javax.imageio; |
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import java.awt.Dimension; |
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import java.io.IOException; |
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import java.util.Iterator; |
import java.util.Iterator; |
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import java.util.List; |
import java.util.List; |
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import java.util.Locale; |
import java.util.Locale; |
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public abstract class ImageWriter |
public abstract class ImageWriter |
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implements ImageTranscoder |
implements ImageTranscoder |
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{ |
{ |
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private boolean aborted; |
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protected Locale[] availableLocales; |
protected Locale[] availableLocales; |
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protected Locale locale; |
protected Locale locale; |
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protected ImageWriterSpi originatingProvider; |
protected ImageWriterSpi originatingProvider; |
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this.originatingProvider = originatingProvider; |
this.originatingProvider = originatingProvider; |
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} |
} |
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private void checkOutputSet() |
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{ |
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if (output == null) |
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throw new IllegalStateException("no output set"); |
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} |
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public void abort() |
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{ |
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aborted = true; |
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} |
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protected boolean abortRequested() |
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{ |
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return aborted; |
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} |
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public void addIIOWriteProgressListener(IIOWriteProgressListener listener) |
public void addIIOWriteProgressListener(IIOWriteProgressListener listener) |
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{ |
{ |
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if (listener == null) |
if (listener == null) |
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warningListeners.add(listener); |
warningListeners.add(listener); |
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} |
} |
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public boolean canInsertEmpty(int imageIndex) |
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throws IOException |
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{ |
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checkOutputSet(); |
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return false; |
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} |
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public boolean canInsertImage(int imageIndex) |
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throws IOException |
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{ |
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checkOutputSet(); |
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return false; |
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} |
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public boolean canRemoveImage(int imageIndex) |
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throws IOException |
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{ |
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checkOutputSet(); |
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return false; |
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} |
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public boolean canReplaceImageMetadata(int imageIndex) |
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throws IOException |
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{ |
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checkOutputSet(); |
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return false; |
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} |
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public boolean canReplacePixels(int imageIndex) |
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throws IOException |
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{ |
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checkOutputSet(); |
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return false; |
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} |
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public boolean canReplaceStreamMetadata() |
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throws IOException |
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{ |
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checkOutputSet(); |
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return false; |
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} |
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public boolean canWriteEmpty() |
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throws IOException |
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{ |
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checkOutputSet(); |
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return false; |
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} |
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public boolean canWriteRasters() |
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{ |
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return false; |
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} |
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public boolean canWriteSequence() |
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{ |
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return false; |
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} |
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protected void clearAbortRequest() |
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{ |
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aborted = false; |
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} |
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public void dispose() |
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{ |
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// The default implementation is empty. Subclasses have to overwrite it. |
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} |
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public Locale[] getAvailableLocales() |
public Locale[] getAvailableLocales() |
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{ |
{ |
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return availableLocales; |
return availableLocales; |
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public abstract IIOMetadata getDefaultStreamMetadata (ImageWriteParam param); |
public abstract IIOMetadata getDefaultStreamMetadata (ImageWriteParam param); |
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public ImageWriteParam getDefaultWriteParam() |
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{ |
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return new ImageWriteParam(getLocale()); |
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} |
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public Locale getLocale() |
public Locale getLocale() |
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{ |
{ |
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return locale; |
return locale; |
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} |
} |
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public int getNumThumbnailsSupported (ImageTypeSpecifier imageType, ImageWriteParam param, |
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IIOMetadata streamMetadata, IIOMetadata imageMetadata) |
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{ |
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return 0; |
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} |
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public ImageWriterSpi getOriginatingProvider() |
public ImageWriterSpi getOriginatingProvider() |
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{ |
{ |
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return originatingProvider; |
return originatingProvider; |
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} |
} |
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public Object getOutput() |
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{ |
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return output; |
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} |
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public Dimension[] getPreferredThumbnailSizes (ImageTypeSpecifier imageType, |
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ImageWriteParam param, |
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IIOMetadata streamMetadata, |
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IIOMetadata imageMetadata) |
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{ |
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return null; |
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} |
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protected void processImageComplete() |
protected void processImageComplete() |
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{ |
{ |
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Iterator it = progressListeners.iterator(); |
Iterator it = progressListeners.iterator(); |
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warningListeners.remove(listener); |
warningListeners.remove(listener); |
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} |
} |
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public void reset() |
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{ |
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setOutput(null); |
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setLocale(null); |
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removeAllIIOWriteWarningListeners(); |
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removeAllIIOWriteProgressListeners(); |
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clearAbortRequest(); |
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} |
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public void setLocale(Locale locale) |
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{ |
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if (locale != null) |
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{ |
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// Check if its a valid locale. |
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boolean found = false; |
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if (availableLocales != null) |
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for (int i = availableLocales.length - 1; i >= 0; --i) |
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if (availableLocales[i].equals(locale)) |
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found = true; |
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if (! found) |
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throw new IllegalArgumentException("looale not available"); |
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} |
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this.locale = locale; |
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} |
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public void setOutput(Object output) |
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{ |
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if (output != null) |
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{ |
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// Check if its a valid output object. |
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boolean found = false; |
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Class[] types = null; |
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if (originatingProvider != null) |
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types = originatingProvider.getOutputTypes(); |
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if (types != null) |
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for (int i = types.length - 1; i >= 0; --i) |
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if (types[i].equals(output.getClass())) |
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found = true; |
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if (! found) |
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throw new IllegalArgumentException("output type not available"); |
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} |
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this.output = output; |
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} |
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} |
} |