org.apache.axiom.blob.IOUtil 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.blob;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.axiom.ext.io.ReadFromSupport;
import org.apache.axiom.ext.io.StreamCopyException;
final class IOUtil {
private IOUtil() {}
static long copy(InputStream in, OutputStream out, long length) throws StreamCopyException {
if (out instanceof ReadFromSupport) {
return ((ReadFromSupport)out).readFrom(in, length);
} else {
byte[] buffer = new byte[4096];
long read = 0;
long toRead = length == -1 ? Long.MAX_VALUE : length;
while (toRead > 0) {
int c;
try {
c = in.read(buffer, 0, (int)Math.min(toRead, buffer.length));
} catch (IOException ex) {
throw new StreamCopyException(StreamCopyException.READ, ex);
}
if (c == -1) {
break;
}
try {
out.write(buffer, 0, c);
} catch (IOException ex) {
throw new StreamCopyException(StreamCopyException.WRITE, ex);
}
read += c;
toRead -= c;
}
return read;
}
}
}