kafka ByteBufferInputStream 源码
kafka ByteBufferInputStream 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/utils/ByteBufferInputStream.java
/*
* 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.kafka.common.utils;
import java.io.InputStream;
import java.nio.ByteBuffer;
/**
* A byte buffer backed input inputStream
*/
public final class ByteBufferInputStream extends InputStream {
private final ByteBuffer buffer;
public ByteBufferInputStream(ByteBuffer buffer) {
this.buffer = buffer;
}
public int read() {
if (!buffer.hasRemaining()) {
return -1;
}
return buffer.get() & 0xFF;
}
public int read(byte[] bytes, int off, int len) {
if (len == 0) {
return 0;
}
if (!buffer.hasRemaining()) {
return -1;
}
len = Math.min(len, buffer.remaining());
buffer.get(bytes, off, len);
return len;
}
}
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