path: root/libjava/javax/imageio/spi/ImageReaderWriterSpi.java

/* ImageReaderWriterSpi.java -- Superclass for image reader and writer spis.
   Copyright (C) 2004, 2005  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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terms of your choice, provided that you also meet, for each linked
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package javax.imageio.spi;


/**
 * An abstract superclass that contains the common parts of {@link
 * javax.imageio.spi.ImageReaderSpi} and {@link
 * javax.imageio.spi.ImageWriterSpi}.
 *
 * @since 1.4
 *
 * @author Sascha Brawer (brawer@dandelis.ch)
 */
public abstract class ImageReaderWriterSpi
  extends IIOServiceProvider
{
  /**
   * The human-readable, localized names of the supported image
   * formats. This value should be non-<code>null</code> after
   * construction.
   *
   * @see #getFormatNames()
   */
  protected String[] names;


  /**
   * The file suffixes of the supported image formats. This value
   * should be non-<code>null</code> after construction.
   *
   * @see #getFileSuffixes()
   */
  protected String[] suffixes;


  /**
   * The MIME types of the supported image formats.  This value
   * should be non-<code>null</code> after construction.
   *
   * @see #getMIMETypes()
   */
  protected String[] MIMETypes;


  /**
   * The fully qualified name of the class that implements the {@link
   * javax.imageio.ImageReader} or {@link javax.imageio.ImageWriter}
   * interface.  This value should be non-<code>null</code> after
   * construction.
   *
   * @see #getPluginClassName()
   */
  protected String pluginClassName;


  /**
   * Indicates whether the per-stream {@linkplain
   * javax.imageio.metadata.IIOMetadata metadata objects} associated
   * with this plug-in support format
   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
   * <code>getAsTree</code> and <code>setAsTree</code> methods.
   *
   * @see #isStandardStreamMetadataFormatSupported()
   */
  protected boolean supportsStandardStreamMetadataFormat;


  /**
   * The name of the format that allows encoding all stream metadata
   * without loss, or <code>null</code> if this plug-in does not
   * provide a format that preserves all stream metadata.
   */
  protected String nativeStreamMetadataFormatName;

  protected String nativeStreamMetadataFormatClassName;


  /**
   * The names of additional formats for encoding stream metadata,
   * other than the {@linkplain
   * #isStandardStreamMetadataFormatSupported() standard} and the
   * {@linkplain #getNativeStreamMetadataFormatName() native} formats,
   * or <code>null</code> if this plug-in does not provide any extra
   * formats.
   */
  protected String[] extraStreamMetadataFormatNames;


  protected String[] extraStreamMetadataFormatClassNames;


  /**
   * Indicates whether the per-image {@linkplain
   * javax.imageio.metadata.IIOMetadata metadata objects} associated
   * with this plug-in support format
   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
   * <code>getAsTree</code> and <code>setAsTree</code> methods.
   *
   * @see #isStandardImageMetadataFormatSupported()
   */
  protected boolean supportsStandardImageMetadataFormat;


  /**
   * The name of the format that allows encoding all image metadata
   * without loss, or <code>null</code> if this plug-in does not
   * provide a format that preserves all image metadata.
   */
  protected String nativeImageMetadataFormatName;

  protected String nativeImageMetadataFormatClassName;


  /**
   * The names of additional formats for encoding image metadata,
   * other than the {@linkplain
   * #isStandardImageMetadataFormatSupported() standard} and the
   * {@linkplain #getNativeImageMetadataFormatName() native} formats,
   * or <code>null</code> if this plug-in does not provide any extra
   * formats.
   */
  protected String[] extraImageMetadataFormatNames;


  protected String[] extraImageMetadataFormatClassNames;


  /**
   * Constructs an <code>ImageReaderWriteSpi</code> instance, without
   * specifying a number of parameters. Constructors of concrete
   * subclasses must ensure that they set all inherited fields to
   * meaningful values.
   */
  public ImageReaderWriterSpi()
  {
  }


  /**
   * Constructs an <code>ImageReaderWriteSpi</code> instance,
   * specifying a number of parameters.
   *
   * @param names the human-readable, localized names of the supported
   * image formats, for example <code>[&#x201c;Tagged Image File
   * Format&#x201d;, &#x201c;Portable Network
   * Graphics&#x201d;]</code>.
   *
   * @param suffixes the file suffixes of the supported image formats,
   * for example <code>[&#x201c;tiff&#x201d;, &#x201c;tif&#x201d;,
   * &#x201c;png&#x201d;]</code>.
   *
   * @param MIMETypes the MIME types of the supported image formats,
   * for example <code>[&#x201c;image/tiff&#x201d;,
   * &#x201c;image/png&#x201d;]</code>.
   *
   * @param pluginClassName the fully qualified name of the class that
   * implements the {@link javax.imageio.ImageReader} or {@link
   * javax.imageio.ImageWriter} interface.
   *
   * @param supportsStandardStreamMetadataFormat whether the
   * per-stream {@linkplain javax.imageio.metadata.IIOMetadata
   * metadata objects} associated with this plug-in support format
   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
   * <code>getAsTree</code> and <code>setAsTree</code> methods.
   *
   * @param nativeStreamMetadataFormatName the name of the format that
   * allows encoding all stream metadata without loss, or
   * <code>null</code> if this plug-in does not provide a format that
   * preserves all stream metadata.
   *
   * @param extraStreamMetadataFormatNames the names of additional
   * formats for encoding stream metadata, other than the {@linkplain
   * #isStandardStreamMetadataFormatSupported() standard} and the
   * {@linkplain #getNativeStreamMetadataFormatName() native} formats,
   * or <code>null</code> if this plug-in does not provide any extra
   * formats.
   *
   * @param supportsStandardImageMetadataFormat whether the per-image
   * {@linkplain javax.imageio.metadata.IIOMetadata metadata objects}
   * associated with this plug-in support format
   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
   * <code>getAsTree</code> and <code>setAsTree</code> methods.
   *
   * @param nativeImageMetadataFormatName the name of the format that
   * allows encoding all image metadata without loss, or
   * <code>null</code> if this plug-in does not provide a format that
   * preserves all image metadata.
   *
   * @param extraImageMetadataFormatNames the names of additional
   * formats for encoding image metadata, other than the {@linkplain
   * #isStandardImageMetadataFormatSupported() standard} and the
   * {@linkplain #getNativeImageMetadataFormatName() native} formats,
   * or <code>null</code> if this plug-in does not provide any extra
   * formats.
   *
   * @throws IllegalArgumentException if <code>vendorName</code>
   * or <code>version</code> is <code>null</code>.
   */
  public ImageReaderWriterSpi(String vendorName, String version,
                              String[] names, String[] suffixes,
                              String[] MIMETypes, String pluginClassName,
                              boolean supportsStandardStreamMetadataFormat,
                              String nativeStreamMetadataFormatName,
                              String nativeStreamMetadataFormatClassName,
                              String[] extraStreamMetadataFormatNames,
                              String[] extraStreamMetadataFormatClassNames,
                              boolean supportsStandardImageMetadataFormat,
                              String nativeImageMetadataFormatName,
                              String nativeImageMetadataFormatClassName,
                              String[] extraImageMetadataFormatNames,
                              String[] extraImageMetadataFormatClassNames)
  {
    /* The inherited constructor will throw IllegalArgumentException
     * if one of its arguments is null.
     */
    super(vendorName, version);

    if (names == null || names.length == 0 || pluginClassName == null)
      throw new IllegalArgumentException();

    this.names = names;
    this.suffixes = suffixes;
    this.MIMETypes = MIMETypes;
    this.pluginClassName = pluginClassName;

    this.supportsStandardStreamMetadataFormat
      = supportsStandardStreamMetadataFormat;

    this.nativeStreamMetadataFormatName
      = nativeStreamMetadataFormatName;

    this.nativeStreamMetadataFormatClassName
      = nativeStreamMetadataFormatClassName;

    this.extraStreamMetadataFormatNames
      = extraStreamMetadataFormatNames;

    this.extraStreamMetadataFormatClassNames
      = extraStreamMetadataFormatClassNames;

    this.supportsStandardImageMetadataFormat
      = supportsStandardImageMetadataFormat;

    this.nativeImageMetadataFormatName
      = nativeImageMetadataFormatName;

    this.nativeImageMetadataFormatClassName
      = nativeImageMetadataFormatClassName;

    this.extraImageMetadataFormatNames
      = extraImageMetadataFormatNames;

    this.extraImageMetadataFormatClassNames
      = extraImageMetadataFormatClassNames;
  }


  /**
   * Returns the human-readable, localized names of the supported
   * image formats. For example, a plug-in might return an array with
   * the elements <code>[&#x201c;Tagged Image File Format&#x201d;,
   * &#x201c;Portable Network Graphics&#x201d;]</code>.
   */
  public String[] getFormatNames()
  {
    return (String[]) names.clone();
  }


  /**
   * Returns the file suffixes of the supported image formats, for
   * example <code>[&#x201c;tiff&#x201d;, &#x201c;tif&#x201d;,
   * &#x201c;png&#x201d;]</code>.
   */
  public String[] getFileSuffixes()
  {
    return suffixes;
  }


  /**
   * Returns the MIME types of the supported image formats, for
   * example <code>[&#x201c;image/tiff&#x201d;,
   * &#x201c;image/png&#x201d;]</code>.
   *
   * @return an array of MIME type strings, or <code>null</code> if
   * none of the supported formats has an associated MIME type.
   */
  public String[] getMIMETypes()
  {
    return MIMETypes;
  }


  /**
   * Returns the fully qualified name of the class that implements the
   * {@link javax.imageio.ImageReader} or {@link
   * javax.imageio.ImageWriter} interface.
   */
  public String getPluginClassName()
  {
    return pluginClassName;
  }


  /**
   * Returns whether the per-stream {@linkplain
   * javax.imageio.metadata.IIOMetadata metadata objects} associated
   * with this plug-in support format
   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
   * <code>getAsTree</code> and <code>setAsTree</code> methods.
   */
  public boolean isStandardStreamMetadataFormatSupported()
  {
    return supportsStandardStreamMetadataFormat;
  }


  /**
   * Returns the name of the format that allows encoding all stream
   * metadata without loss, or <code>null</code> if this plug-in does
   * not provide a format that preserves all stream metadata.
   *
   * @see #getNativeImageMetadataFormatName()
   */
  public String getNativeStreamMetadataFormatName()
  {
    return nativeStreamMetadataFormatName;
  }


  /**
   * Returns the names of additional formats for encoding stream
   * metadata, other than the {@linkplain
   * #isStandardStreamMetadataFormatSupported() standard} and the
   * {@linkplain #getNativeStreamMetadataFormatName() native} formats,
   * or <code>null</code> if this plug-in does not provide any extra
   * formats.
   *
   * @see #getExtraImageMetadataFormatNames()
   */
  public String[] getExtraStreamMetadataFormatNames()
  {
    return extraStreamMetadataFormatNames;
  }


  /**
   * Returns whether the per-image {@linkplain
   * javax.imageio.metadata.IIOMetadata metadata objects} associated
   * with this plug-in support format
   * <code>&#x201c;javax_imageio_1.0&#x201d;</code> in their
   * <code>getAsTree</code> and <code>setAsTree</code> methods.
   */
  public boolean isStandardImageMetadataFormatSupported()
  {
    return supportsStandardImageMetadataFormat;
  }


  /**
   * Returns the name of the format that allows encoding all image
   * metadata without loss, or <code>null</code> if this plug-in does
   * not provide a format that preserves all image metadata.
   *
   * @see #getNativeStreamMetadataFormatName()
   */
  public String getNativeImageMetadataFormatName()
  {
    return nativeImageMetadataFormatName;
  }


  /**
   * Returns the names of additional formats for encoding image
   * metadata, other than the {@linkplain
   * #isStandardImageMetadataFormatSupported() standard} and the
   * {@linkplain #getNativeImageMetadataFormatName() native} formats,
   * or <code>null</code> if this plug-in does not provide any extra
   * formats.
   *
   * @see #getExtraStreamMetadataFormatNames()
   */
  public String[] getExtraImageMetadataFormatNames()
  {
    return extraImageMetadataFormatNames;
  }
}