org.apache.axiom.attachments.ReadOnceInputStreamWrapper Maven / Gradle / Ivy
/*
* 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.attachments;
import java.io.IOException;
import java.io.InputStream;
/**
* Input stream wrapper that automatically calls {@link PartImpl#releaseContent()} when the content
* has been consumed.
*/
class ReadOnceInputStreamWrapper extends InputStream {
private final PartImpl part;
private InputStream in;
ReadOnceInputStreamWrapper(PartImpl part, InputStream in) {
this.part = part;
this.in = in;
}
public int available() throws IOException {
return in == null ? 0 : in.available();
}
public int read() throws IOException {
if (in == null) {
return -1;
} else {
int result = in.read();
if (result == -1) {
close();
}
return result;
}
}
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;
}
}
public int read(byte[] b) throws IOException {
if (in == null) {
return -1;
} else {
int result = in.read(b);
if (result == -1) {
close();
}
return result;
}
}
public long skip(long n) throws IOException {
return in == null ? 0 : in.skip(n);
}
public void close() throws IOException {
if (in != null) {
in.close();
part.releaseContent();
in = null;
}
}
}