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/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*
*/
package org.apache.hc.client5.http.entity;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UncheckedIOException;
import org.apache.hc.core5.io.Closer;
/**
* Lazy initializes from an {@link InputStream} wrapper.
*/
class LazyDecompressingInputStream extends FilterInputStream {
private final InputStreamFactory inputStreamFactory;
private InputStream wrapperStream;
public LazyDecompressingInputStream(
final InputStream wrappedStream,
final InputStreamFactory inputStreamFactory) {
super(wrappedStream);
this.inputStreamFactory = inputStreamFactory;
}
private InputStream initWrapper() throws IOException {
if (wrapperStream == null) {
wrapperStream = inputStreamFactory.create(in);
}
return wrapperStream;
}
@Override
public int read() throws IOException {
return initWrapper().read();
}
@Override
public int read(final byte[] b) throws IOException {
return initWrapper().read(b);
}
@Override
public int read(final byte[] b, final int off, final int len) throws IOException {
return initWrapper().read(b, off, len);
}
@Override
public long skip(final long n) throws IOException {
return initWrapper().skip(n);
}
@Override
public boolean markSupported() {
return false;
}
@Override
public int available() throws IOException {
return initWrapper().available();
}
@Override
public void close() throws IOException {
try {
Closer.close(wrapperStream);
} finally {
super.close();
}
}
@Override
public void mark(final int readlimit) {
try {
initWrapper().mark(readlimit);
} catch (final IOException e) {
throw new UncheckedIOException(e);
}
}
@Override
public void reset() throws IOException {
initWrapper().reset();
}
}
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