| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.axiom.mime; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.axiom.blob.MemoryBlob; |
| import org.apache.axiom.blob.WritableBlob; |
| import org.apache.axiom.blob.WritableBlobFactory; |
| |
| final class PartInputStream extends InputStream { |
| private WritableBlob content; |
| private InputStream in; |
| private WritableBlobFactory<?> blobFactory; |
| |
| PartInputStream(WritableBlob content) throws IOException { |
| this.content = content; |
| in = getInputStream(content); |
| } |
| |
| PartInputStream(InputStream in, WritableBlobFactory<?> blobFactory) { |
| this.in = in; |
| this.blobFactory = blobFactory; |
| } |
| |
| private static InputStream getInputStream(WritableBlob content) throws IOException { |
| if (content instanceof MemoryBlob) { |
| return ((MemoryBlob)content).readOnce(); |
| } else { |
| return content.getInputStream(); |
| } |
| } |
| |
| void detach() throws IOException { |
| if (blobFactory == null) { |
| throw new IllegalStateException(); |
| } |
| if (in != null) { |
| WritableBlob content = blobFactory.createBlob(); |
| content.readFrom(in); |
| this.content = content; |
| in = getInputStream(content); |
| } |
| blobFactory = null; |
| } |
| |
| @Override |
| public int available() throws IOException { |
| return in == null ? 0 : in.available(); |
| } |
| |
| @Override |
| public int read() throws IOException { |
| if (in == null) { |
| return -1; |
| } else { |
| int result = in.read(); |
| if (result == -1) { |
| close(); |
| } |
| return result; |
| } |
| } |
| |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| if (in == null) { |
| return -1; |
| } else { |
| int result = in.read(b, off, len); |
| if (result == -1) { |
| close(); |
| } |
| return result; |
| } |
| } |
| |
| @Override |
| public int read(byte[] b) throws IOException { |
| if (in == null) { |
| return -1; |
| } else { |
| int result = in.read(b); |
| if (result == -1) { |
| close(); |
| } |
| return result; |
| } |
| } |
| |
| @Override |
| public long skip(long n) throws IOException { |
| return in == null ? 0 : in.skip(n); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (in != null) { |
| in.close(); |
| in = null; |
| } |
| if (content != null) { |
| content.release(); |
| content = null; |
| } |
| } |
| } |