/*
* @(#)InputStreamImageInputStreamSpi.java 1.20 05/11/17
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package com.sun.imageio.spi;
import java.io.File;
import java.io.InputStream;
import java.io.IOException;
import java.util.Locale;
import javax.imageio.spi.ImageInputStreamSpi;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.FileCacheImageInputStream;
import javax.imageio.stream.MemoryCacheImageInputStream;
public class InputStreamImageInputStreamSpi extends ImageInputStreamSpi {
private static final String vendorName = "Sun Microsystems, Inc.";
private static final String version = "1.0";
private static final Class inputClass = InputStream.class;
public InputStreamImageInputStreamSpi() {
super(vendorName, version, inputClass);
}
public String getDescription(Locale locale) {
return "Service provider that instantiates a FileCacheImageInputStream or MemoryCacheImageInputStream from an InputStream";
}
public boolean canUseCacheFile() {
return true;
}
public boolean needsCacheFile() {
return false;
}
public ImageInputStream createInputStreamInstance(Object input,
boolean useCache,
File cacheDir)
throws IOException {
if (input instanceof InputStream) {
InputStream is = (InputStream)input;
if (useCache) {
return new FileCacheImageInputStream(is, cacheDir);
} else {
return new MemoryCacheImageInputStream(is);
}
} else {
throw new IllegalArgumentException();
}
}
}