138 lines
4.0 KiB
Java
138 lines
4.0 KiB
Java
/*
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.xml.internal.ws.encoding;
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import com.sun.xml.internal.org.jvnet.mimepull.MIMEPart;
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import javax.activation.DataSource;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.File;
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import com.sun.xml.internal.ws.developer.StreamingDataHandler;
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/**
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* Implementation of {@link StreamingDataHandler} to access MIME
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* attachments efficiently. Applications can use the additional methods and decide
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* on how to access the attachment data in JAX-WS applications.
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*
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* <p>
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* for e.g.:
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*
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* DataHandler dh = proxy.getData();
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* StreamingDataHandler sdh = (StreamingDataHandler)dh;
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* // readOnce() doesn't store attachment on the disk in some cases
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* // for e.g when only one huge attachment after soap envelope part in MIME message
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* InputStream in = sdh.readOnce();
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* ...
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* in.close();
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* sdh.close();
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*
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* @author Jitendra Kotamraju
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*/
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public class MIMEPartStreamingDataHandler extends StreamingDataHandler {
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private final StreamingDataSource ds;
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public MIMEPartStreamingDataHandler(MIMEPart part) {
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super(new StreamingDataSource(part));
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ds = (StreamingDataSource)getDataSource();
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}
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@Override
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public InputStream readOnce() throws IOException {
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return ds.readOnce();
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}
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@Override
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public void moveTo(File file) throws IOException {
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ds.moveTo(file);
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}
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@Override
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public void close() throws IOException {
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ds.close();
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}
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private static final class StreamingDataSource implements DataSource {
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private final MIMEPart part;
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StreamingDataSource(MIMEPart part) {
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this.part = part;
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}
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@Override
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public InputStream getInputStream() throws IOException {
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return part.read(); //readOnce() ??
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}
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InputStream readOnce() throws IOException {
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try {
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return part.readOnce();
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} catch(Exception e) {
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throw new MyIOException(e);
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}
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}
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void moveTo(File file) throws IOException {
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part.moveTo(file);
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}
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@Override
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public OutputStream getOutputStream() throws IOException {
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return null;
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}
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@Override
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public String getContentType() {
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return part.getContentType();
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}
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@Override
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public String getName() {
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return "";
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}
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public void close() throws IOException {
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part.close();
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}
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}
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private static final class MyIOException extends IOException {
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private final Exception linkedException;
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MyIOException(Exception linkedException) {
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this.linkedException = linkedException;
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}
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@Override
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public Throwable getCause() {
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return linkedException;
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}
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}
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}
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