/*
* Copyright 2000-2015 JetBrains s.r.o.
*
* 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.intellij.util.io;
import com.intellij.util.containers.ShareableKey;
import org.jetbrains.annotations.NotNull;
class FileChunkKey<OwnerType> implements Comparable<FileChunkKey<OwnerType>>, ShareableKey {
private OwnerType owner;
private long offset;
public FileChunkKey(OwnerType owner, long offset) {
this.owner = owner;
this.offset = offset;
}
public int hashCode() {
return (int)(owner.hashCode() * 31 + offset);
}
public OwnerType getOwner() {
return owner;
}
public long getOffset() {
return offset;
}
public boolean equals(final Object obj) {
if (getClass() != obj.getClass()) return false;
FileChunkKey<OwnerType> k = (FileChunkKey<OwnerType>)obj;
return k.owner == owner && k.offset == offset;
}
public void setup(OwnerType owner, long offset) {
this.owner = owner;
this.offset = offset;
}
@Override
public int compareTo(@NotNull final FileChunkKey<OwnerType> o) {
if (owner != o.owner) {
return owner.hashCode() - o.owner.hashCode();
}
return offset == o.offset ? 0 : offset - o.offset < 0 ? -1 : 1;
}
@Override
public ShareableKey getStableCopy() {
return new FileChunkKey<OwnerType>(owner, offset);
}
}