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/*
* Copyright (C) 2007 The Guava Authors
*
* Licensed 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 com.google.common.io;
import static com.google.common.base.Preconditions.checkNotNull;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Random;
/** Returns a random portion of the requested bytes on each call. */
class RandomAmountInputStream extends FilterInputStream {
private final Random random;
public RandomAmountInputStream(InputStream in, Random random) {
super(checkNotNull(in));
this.random = checkNotNull(random);
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
return super.read(b, off, random.nextInt(len) + 1);
}
}
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