| // Copyright 2016 Google Inc. All rights reserved. |
| // |
| // 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.archivepatcher.shared; |
| |
| /** |
| * A range, annotated with metadata, that is represented as an offset and a length. Comparison is |
| * performed based on the natural ordering of the offset field. |
| * @param <T> the type of the metadata |
| */ |
| public class TypedRange<T> implements Comparable<TypedRange<T>> { |
| /** |
| * The offset at which the range starts. |
| */ |
| private final long offset; |
| |
| /** |
| * The length of the range. |
| */ |
| private final long length; |
| |
| /** |
| * Optional metadata associated with this range. |
| */ |
| private final T metadata; |
| |
| /** |
| * Constructs a new range with the specified parameters. |
| * @param offset the offset at which the range starts |
| * @param length the length of the range |
| * @param metadata optional metadata associated with this range |
| */ |
| public TypedRange(long offset, long length, T metadata) { |
| this.offset = offset; |
| this.length = length; |
| this.metadata = metadata; |
| } |
| |
| @Override |
| public String toString() { |
| return "offset " + offset + ", length " + length + ", metadata " + metadata; |
| } |
| |
| /** |
| * Returns the offset at which the range starts. |
| * @return as described |
| */ |
| public long getOffset() { |
| return offset; |
| } |
| |
| /** |
| * Returns the length of the range. |
| * @return as described |
| */ |
| public long getLength() { |
| return length; |
| } |
| |
| /** |
| * Returns the metadata associated with the range, or null if no metadata has been set. |
| * @return as described |
| */ |
| public T getMetadata() { |
| return metadata; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + (int) (length ^ (length >>> 32)); |
| result = prime * result + ((metadata == null) ? 0 : metadata.hashCode()); |
| result = prime * result + (int) (offset ^ (offset >>> 32)); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) return true; |
| if (obj == null) return false; |
| if (getClass() != obj.getClass()) return false; |
| TypedRange<?> other = (TypedRange<?>) obj; |
| if (length != other.length) return false; |
| if (metadata == null) { |
| if (other.metadata != null) return false; |
| } else if (!metadata.equals(other.metadata)) return false; |
| if (offset != other.offset) return false; |
| return true; |
| } |
| |
| @Override |
| public int compareTo(TypedRange<T> other) { |
| if (getOffset() < other.getOffset()) { |
| return -1; |
| } else if (getOffset() > other.getOffset()) { |
| return 1; |
| } |
| return 0; |
| } |
| } |