1 files changed, 143 insertions, 0 deletions
diff --git a/libjava/javax/imageio/spi/ImageOutputStreamSpi.java b/libjava/javax/imageio/spi/ImageOutputStreamSpi.java
new file mode 100644
index 0000000..aa287c3
--- /dev/null
+++ b/libjava/javax/imageio/spi/ImageOutputStreamSpi.java
@@ -0,0 +1,143 @@
+/* ImageOutputStreamSpi.java -- Service provider for image output streams.
+   Copyright (C) 2004 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
+the Free Software Foundation; either version 2, or (at your option)
+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.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+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
+conditions of the GNU General Public License cover the whole
+combination.
+
+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
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.imageio.spi;
+
+import java.io.File;
+import java.io.IOException;
+import javax.imageio.stream.ImageOutputStream;
+
+
+/**
+ * An abstract superclass for service providers that create
+ * {@linkplain javax.imageio.stream.ImageOutputStream image output
+ * streams} for a file, URL, byte array or any other target.
+ *
+ * @since 1.4
+ *
+ * @author <a href="mailto:brawer@dandelis.ch">Sascha Brawer</a>
+ */
+public abstract class ImageOutputStreamSpi
+  extends IIOServiceProvider
+{
+  /**
+   * Indicates which kind of output is produced by the streams
+   * created by {@link #createOutputStreamInstance(Object)}.
+   */
+  protected Class outputClass;
+
+
+  /**
+   * Constructs a service provider for image output streams, given no
+   * parameters. It is up to the sub-class to set {@link #vendorName},
+   * {@link #version} and {@link #outputClass} to non-null values.
+   */
+  protected ImageOutputStreamSpi()
+  {
+  }
+
+
+  /**
+   * Constructs a service provider for image output streams, given the
+   * vendor name, a version string and the kind of producable output.
+   *
+   * @throws IllegalArgumentException if <code>vendorName</code>
+   * or <code>version</code> is <code>null</code>.
+   */
+  public ImageOutputStreamSpi(String vendorName, String version,
+                              Class outputClass)
+  {
+    super(vendorName, version);
+    this.outputClass = outputClass;
+  }
+
+
+  /**
+   * Determines which kind of output is produced by the streams
+   * created by {@link #createOutputStreamInstance(Object)}.
+   */
+  public Class getOutputClass()
+  {
+    return outputClass;
+  }
+
+
+  /**
+   * Determines whether <code>ImageOutputStreams</code> created
+   * by this service provider benefit from using a cache file.
+   *
+   * <p>The default behavior is to return <code>false</code>.
+   *
+   * @return <code>true</code> if the created streams are faster or
+   * need less memory when a cache file is being used;
+   * <code>false</code> if no positive effect results from the cache
+   * file.
+   */
+  public boolean canUseCacheFile()
+  {
+    return false;
+  }
+
+
+  /**
+   * Determines whether <code>ImageOutputStreams</code> created
+   * by this service provider require the use of a cache file.
+   *
+   * <p>The default behavior is to return <code>false</code>.
+   *
+   * @return <code>true</code> if the created streams can only work
+   * when a cache file is being used; <code>false</code> if no cache
+   * file is needed.
+   */
+  public boolean needsCacheFile()
+  {
+    return false;
+  }
+
+
+  public abstract ImageOutputStream createOutputStreamInstance(
+    Object output, boolean useCache, File cacheDir)
+    throws IOException;
+
+
+  public ImageOutputStream createOutputStreamInstance(Object output)
+    throws IOException
+  {
+    return createOutputStreamInstance(output, canUseCacheFile(), null);
+  }
+}