org.apache.flink.runtime.util.FileOffsetRange 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.flink.runtime.util;
import org.apache.flink.util.Preconditions;
import java.io.Serializable;
import java.util.Objects;
/**
* To specify offset range of a file.
*/
public class FileOffsetRange implements Serializable {
private static final long serialVersionUID = 7069346824354308L;
private long start;
private long size;
public FileOffsetRange(long start, long size) {
this.start = Preconditions.checkNotNull(start);
this.size = Preconditions.checkNotNull(size);
}
public FileOffsetRange normalize(long fileLength) {
long count = this.size > fileLength ? fileLength : this.size;
long startTmp = this.start < 0 ? (fileLength + this.start) : this.start;
if (startTmp <= 0) {
startTmp = 0L;
} else if (startTmp >= fileLength){
startTmp = fileLength - count;
} else {
startTmp = startTmp;
}
long sizeTmp = Math.abs(this.size > fileLength || this.size == FileOffsetRange.getSizeDefaultValue() ? fileLength : this.size);
long end = sizeTmp + startTmp;
if (end > fileLength) {
sizeTmp = fileLength - startTmp;
} else {
sizeTmp = sizeTmp;
}
this.start = startTmp;
this.size = sizeTmp;
return this;
}
public long getStart() {
return this.start;
}
public long getSize() {
return this.size;
}
public static long getStartDefaultValue(){
return 0L;
}
public static long getSizeDefaultValue(){
return -1L;
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
} else if (obj != null && obj.getClass() == FileOffsetRange.class) {
FileOffsetRange that = (FileOffsetRange) obj;
return this.getStart() == that.getStart() && this.getSize() == that.getSize();
} else {
return false;
}
}
@Override
public final int hashCode() {
return Objects.hash(this.start, this.size);
}
@Override
public String toString() {
return "start=" + start + ", size=" + size;
}
}