com.sun.xml.ws.encoding.MIMEPartStreamingDataHandler Maven / Gradle / Ivy
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package com.sun.xml.ws.encoding;
import org.jvnet.mimepull.MIMEPart;
import javax.activation.DataSource;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.File;
import com.sun.xml.ws.developer.StreamingDataHandler;
/**
* Implementation of {@link StreamingDataHandler} to access MIME
* attachments efficiently. Applications can use the additional methods and decide
* on how to access the attachment data in JAX-WS applications.
*
*
* for e.g.:
*
* DataHandler dh = proxy.getData();
* StreamingDataHandler sdh = (StreamingDataHandler)dh;
* // readOnce() doesn't store attachment on the disk in some cases
* // for e.g when only one huge attachment after soap envelope part in MIME message
* InputStream in = sdh.readOnce();
* ...
* in.close();
* sdh.close();
*
* @author Jitendra Kotamraju
*/
public class MIMEPartStreamingDataHandler extends StreamingDataHandler {
private final StreamingDataSource ds;
public MIMEPartStreamingDataHandler(MIMEPart part) {
super(new StreamingDataSource(part));
ds = (StreamingDataSource)getDataSource();
}
public InputStream readOnce() throws IOException {
return ds.readOnce();
}
public void moveTo(File file) throws IOException {
ds.moveTo(file);
}
public void close() throws IOException {
ds.close();
}
private static final class StreamingDataSource implements DataSource {
private final MIMEPart part;
StreamingDataSource(MIMEPart part) {
this.part = part;
}
public InputStream getInputStream() throws IOException {
return part.read(); //readOnce() ??
}
InputStream readOnce() throws IOException {
try {
return part.readOnce();
} catch(Exception e) {
throw new MyIOException(e);
}
}
void moveTo(File file) throws IOException {
part.moveTo(file);
}
public OutputStream getOutputStream() throws IOException {
return null;
}
public String getContentType() {
return part.getContentType();
}
public String getName() {
return "";
}
public void close() throws IOException {
part.close();
}
}
private static final class MyIOException extends IOException {
private final Exception linkedException;
MyIOException(Exception linkedException) {
this.linkedException = linkedException;
}
@Override
public Throwable getCause() {
return linkedException;
}
}
}