/**
* 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.cxf.io;
import java.io.ByteArrayInputStream;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.cxf.helpers.IOUtils;
public class DelegatingInputStream extends FilterInputStream {
protected boolean cached;
public DelegatingInputStream(InputStream is) {
super(is);
}
public void setInputStream(InputStream inputStream) {
in = inputStream;
}
public InputStream getInputStream() {
return in;
}
/**
* Read the entire original input stream and cache it. Useful
* if switching threads or doing something where the original
* stream may not be valid by the time the next read() occurs
*/
public void cacheInput() {
if (!cached) {
CachedOutputStream cache = new CachedOutputStream();
try {
InputStream origIn = in;
IOUtils.copy(in, cache);
if (cache.size() > 0) {
in = cache.getInputStream();
} else {
in = new ByteArrayInputStream(new byte[0]);
}
cache.close();
origIn.close();
} catch (IOException e) {
//ignore
}
cached = true;
}
}
}
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