fiftyone.mobile.detection.entities.ComponentV31 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;
import fiftyone.mobile.detection.Dataset;
import fiftyone.mobile.detection.readers.BinaryReader;
import fiftyone.properties.DetectionConstants;
import java.io.IOException;
/**
* Extends {@link Component} by providing implementation for the
* {@link #getHttpheaders()} method. Headers for version 3.1 are hard coded
* into the Constants.
*
* Objects of this class should not be created directly as they are part of the
* internal logic. Use the relevant {@link Dataset} method to access these
* objects.
*
* For more information see:
*
* 51Degrees pattern data model.
*/
public class ComponentV31 extends Component {
/**
* Constructs a new instance of ComponentV31. Reads the string offsets to
* the HTTP Headers during the constructor.
*
* @param dataSet The Dataset being created.
* @param index Index of the component within the list.
* @param reader Reader connected to the source data structure and
* positioned to start reading.
*/
public ComponentV31(Dataset dataSet, int index, BinaryReader reader) {
super(dataSet, index, reader);
this.httpHeaders = null;
}
/**
* Implements {@code getHttpheaders()} method. For version 3.1 a list of
* HTTP headers is retrieved from {@link DetectionConstants}.
*
* @return List of HTTP headers as strings.
* @throws java.io.IOException if there was a problem accessing data file.
*/
@SuppressWarnings("DoubleCheckedLocking")
@Override
public String[] getHttpheaders() throws IOException {
String[] localHttpHeaders = httpHeaders;
if (localHttpHeaders == null) {
synchronized(this) {
localHttpHeaders = httpHeaders;
if (localHttpHeaders == null) {
// Implemented as "if else" for 1.6 compatibility.
String cName = super.getName();
if (cName.equals("HardwarePlatform")) {
httpHeaders = localHttpHeaders =
DetectionConstants.DEVICE_USER_AGENT_HEADERS;
} else if (cName.equals("SoftwarePlatform")) {
httpHeaders = localHttpHeaders =
DetectionConstants.DEVICE_USER_AGENT_HEADERS;
} else if (cName.equals("BrowserUA")) {
httpHeaders = localHttpHeaders =
new String[] {
DetectionConstants.USER_AGENT_HEADER
};
} else if (cName.equals("Crawler")) {
httpHeaders = localHttpHeaders =
new String[] {
DetectionConstants.USER_AGENT_HEADER
};
}
}
}
}
return localHttpHeaders;
}
@SuppressWarnings("VolatileArrayField")
private volatile String[] httpHeaders;
}