Constants.java

/*
 *  Licensed to GraphHopper GmbH under one or more contributor
 *  license agreements. See the NOTICE file distributed with this work for 
 *  additional information regarding copyright ownership.
 * 
 *  GraphHopper GmbH 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 com.graphhopper.util;

import com.graphhopper.GraphHopper;

import java.io.InputStreamReader;
import java.util.List;

import static com.graphhopper.util.Helper.readFile;

/**
 * Defining several important constants for GraphHopper. Partially taken from Lucene.
 */
public class Constants {
    /**
     * The value of <tt>System.getProperty("java.version")</tt>. *
     */
    public static final String JAVA_VERSION = System.getProperty("java.version");
    /**
     * The value of <tt>System.getProperty("os.name")</tt>. *
     */
    public static final String OS_NAME = System.getProperty("os.name");
    /**
     * True iff running on Linux.
     */
    public static final boolean LINUX = OS_NAME.startsWith("Linux");
    /**
     * True iff running on Android.
     */
    public static final boolean ANDROID = System.getProperty("java.vendor").contains("Android");
    /**
     * True iff running on Windows.
     */
    public static final boolean WINDOWS = OS_NAME.startsWith("Windows");
    /**
     * True iff running on SunOS.
     */
    public static final boolean SUN_OS = OS_NAME.startsWith("SunOS");
    /**
     * True iff running on Mac OS X
     */
    public static final boolean MAC_OS_X = OS_NAME.startsWith("Mac OS X");
    public static final String OS_ARCH = System.getProperty("os.arch");
    public static final String OS_VERSION = System.getProperty("os.version");
    public static final String JAVA_VENDOR = System.getProperty("java.vendor");
    public static final int VERSION_NODE = 5;
    public static final int VERSION_EDGE = 14;
    public static final int VERSION_SHORTCUT = 2;
    public static final int VERSION_GEOMETRY = 4;
    public static final int VERSION_LOCATION_IDX = 3;
    public static final int VERSION_NAME_IDX = 3;
    /**
     * The version without the snapshot string
     */
    public static final String VERSION;
    public static final String BUILD_DATE;
    public static final boolean SNAPSHOT;

    static {
        String version = "0.0";
        try {
            // see com/graphhopper/version file in resources which is modified in the maven packaging process
            // to contain the current version
            List<String> v = readFile(new InputStreamReader(GraphHopper.class.getResourceAsStream("version"), Helper.UTF_CS));
            version = v.get(0);
        } catch (Exception ex) {
            System.err.println("GraphHopper Initialization ERROR: cannot read version!? " + ex.getMessage());
        }
        int indexM = version.indexOf("-");
        if ("${project.version}".equals(version)) {
            VERSION = "0.0";
            SNAPSHOT = true;
            System.err.println("GraphHopper Initialization WARNING: maven did not preprocess the version file! Do not use the jar for a release!");
        } else if ("0.0".equals(version)) {
            VERSION = "0.0";
            SNAPSHOT = true;
            System.err.println("GraphHopper Initialization WARNING: cannot get version!?");
        } else {
            String tmp = version;
            // throw away the "-SNAPSHOT"
            if (indexM >= 0)
                tmp = version.substring(0, indexM);

            SNAPSHOT = version.toLowerCase().contains("-snapshot");
            VERSION = tmp;
        }
        String buildDate = "";
        try {
            List<String> v = readFile(new InputStreamReader(GraphHopper.class.getResourceAsStream("builddate"), Helper.UTF_CS));
            buildDate = v.get(0);
        } catch (Exception ex) {
        }
        BUILD_DATE = buildDate;
    }

    public static String getVersions() {
        return VERSION_NODE + "," + VERSION_EDGE + "," + VERSION_GEOMETRY + "," + VERSION_LOCATION_IDX
                + "," + VERSION_NAME_IDX + "," + VERSION_SHORTCUT;
    }

    public static String getMajorVersion() {
        int firstIdx = VERSION.indexOf(".");
        if (firstIdx < 0)
            throw new IllegalStateException("Cannot extract major version from version " + VERSION);

        int sndIdx = VERSION.indexOf(".", firstIdx + 1);
        if (sndIdx < 0)
            return VERSION;
        return VERSION.substring(0, sndIdx);
    }
}