fiftyone.mobile.detection.entities.stream.Profile Maven / Gradle / Ivy
/* *********************************************************************
* This Source Code Form is copyright of 51Degrees Mobile Experts Limited.
* Copyright © 2017 51Degrees Mobile Experts Limited, 5 Charlotte Close,
* Caversham, Reading, Berkshire, United Kingdom RG4 7BY
*
* This Source Code Form is the subject of the following patents and patent
* applications, owned by 51Degrees Mobile Experts Limited of 5 Charlotte
* Close, Caversham, Reading, Berkshire, United Kingdom RG4 7BY:
* European Patent No. 2871816;
* European Patent Application No. 17184134.9;
* United States Patent Nos. 9,332,086 and 9,350,823; and
* United States Patent Application No. 15/686,066.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0.
*
* If a copy of the MPL was not distributed with this file, You can obtain
* one at http://mozilla.org/MPL/2.0/.
*
* This Source Code Form is "Incompatible With Secondary Licenses", as
* defined by the Mozilla Public License, v. 2.0.
* ********************************************************************* */
package fiftyone.mobile.detection.entities.stream;
import fiftyone.mobile.detection.IndirectDataset;
import fiftyone.mobile.detection.entities.BaseEntity;
import fiftyone.mobile.detection.readers.BinaryReader;
import java.io.IOException;
/**
* Profile entity with stream specific data access implementation.
*
* Objects of this class should not be created directly as they are part of the
* internal logic.
*/
public class Profile extends fiftyone.mobile.detection.entities.Profile {
private final int position;
private final int valueIndexesCount;
private final int signatureIndexesCount;
private final Pool pool;
/**
* Constructs a new Profile object.
*
* @param dataSet the data set the profile is contained within.
* @param index the index in the data structure to the profile.
* @param reader BinaryReader object to be used.
*/
public Profile(IndirectDataset dataSet, int index, BinaryReader reader) {
super(dataSet, index, reader);
this.pool = dataSet.pool;
valueIndexesCount = reader.readInt32();
signatureIndexesCount = reader.readInt32();
position = reader.getPos();
}
/**
* @return Array of value indexes associated with the profile.
* @throws IOException if there was a problem reading from the data file.
*/
@Override
@SuppressWarnings("DoubleCheckedLocking")
public int[] getValueIndexes() throws IOException {
int[] localValueIndexes = valueIndexes;
if(localValueIndexes == null) {
synchronized(this) {
localValueIndexes = valueIndexes;
if(localValueIndexes == null) {
BinaryReader reader = pool.getReader();
try {
reader.setPos(position);
valueIndexes = localValueIndexes =
BaseEntity.readIntegerArray(reader, valueIndexesCount);
}
finally {
pool.release(reader);
}
}
}
}
return localValueIndexes;
}
/**
* @return Array of signature indexes associated with the profile.
* @throws IOException if there was a problem reading from the data file.
*/
@Override
@SuppressWarnings("DoubleCheckedLocking")
public int[] getSignatureIndexes() throws IOException {
int[] localSignatureIndexes = signatureIndexes;
if(localSignatureIndexes == null) {
synchronized(this) {
localSignatureIndexes = signatureIndexes;
if (localSignatureIndexes == null) {
BinaryReader reader = pool.getReader();
try {
int offset = valueIndexesCount *
(Integer.SIZE / Byte.SIZE);
reader.setPos(position + offset);
signatureIndexes = localSignatureIndexes =
BaseEntity.readIntegerArray(
reader,
signatureIndexesCount);
}
finally {
pool.release(reader);
}
}
}
}
return localSignatureIndexes;
}
}