/*
* 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.isis.core.commons.lang;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
public final class InputStreamExtensions {
private static final int DEFAULT_BUFFER_SIZE = 1024;
private InputStreamExtensions() {
}
/**
* Copy bytes from an <code>InputStream</code> to an
* <code>OutputStream</code>.
* <p>
* This method buffers the input internally, so there is no need to use a
* <code>BufferedInputStream</code>.
*
* @param extendee
* the <code>InputStream</code> to read from
* @param output
* the <code>OutputStream</code> to write to
* @return the number of bytes copied
* @throws IllegalArgumentException
* if the input or output is null
* @throws IOException
* if an I/O error occurs
* @since Commons IO 1.1
*/
public static int copyTo(final InputStream extendee, final OutputStream output) throws IOException {
if (extendee == null) {
throw new IllegalArgumentException("InputStream cannot be null");
}
if (output == null) {
throw new IllegalArgumentException("OutputStream cannot be null");
}
final byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
int count = 0;
int n = 0;
while (-1 != (n = extendee.read(buffer))) {
output.write(buffer, 0, n);
count += n;
}
return count;
}
public static InputStream asUtf8ByteStream(final String string) throws UnsupportedEncodingException {
final byte[] data = string.getBytes("utf-8");
final InputStream in = new ByteArrayInputStream(data);
return in;
}
}