Initial gradle build configuration.

This commit contains an initial gradle configuration that allows for the
worldwind.jar and worldwindx.jar files to be built. The tests are run
and the javadoc can also be built.

Author: wcmatthysen

.gitignore

@@ -16,4 +16,6 @@ worldwind.jar
 
 worldwindx.jar
 
-/nbproject/private/
+/nbproject/private/
+
+.gradle

build.gradle

@@ -0,0 +1,108 @@
+apply plugin: 'java'
+
+group = 'gov.nasa'
+version = '2.2.0'
+
+sourceCompatibility = '1.8'
+targetCompatibility = '1.8'
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+    jcenter()
+}
+
+dependencies {
+    def joglVersion = '2.3.2'
+    implementation "org.jogamp.jogl:jogl-all-main:$joglVersion"
+    implementation "org.jogamp.gluegen:gluegen-rt-main:$joglVersion"
+
+    implementation files('gdal.jar')
+
+    implementation 'org.codehaus.jackson:jackson-core-asl:1.9.13'
+
+    testImplementation 'junit:junit:4.5'
+}
+
+sourceSets {
+    main {
+        java {
+            srcDirs = ['src']
+        }
+    }
+    test {
+        java {
+            srcDirs = ['test']
+        }
+    }
+}
+
+// Compile worldwind jar.
+jar {
+    dependsOn classes
+    version = null
+    from sourceSets.main.output
+    exclude 'gov/nasa/worldwindx/**'
+    from(sourceSets.main.allSource) {
+        include 'gov/nasa/worldwind/util/**/*.properties'
+        include 'config/**'
+        include 'images/**'
+    }
+}
+// Copy worldwind jar to project-directory.
+jar.doLast {
+    copy {
+        from "$buildDir/libs/${jar.archiveName}"
+        into "${project.projectDir}"
+    }
+}
+
+// Compile worldwindx jar.
+task extensionsJar(type: Jar) {
+    archiveBaseName = 'worldwindx'
+    version = null
+    from sourceSets.main.output
+    include 'gov/nasa/worldwindx/**/*.class'
+    from(sourceSets.main.allSource) {
+        include 'gov/nasa/worldwindx/applications/sar/*.html'
+        include 'gov/nasa/worldwindx/applications/sar/config/**'
+        include 'gov/nasa/worldwindx/applications/sar/data/**'
+        include 'gov/nasa/worldwindx/applications/sar/images/**'
+        include 'gov/nasa/worldwindx/applications/worldwindow/config/**'
+        include 'gov/nasa/worldwindx/applications/worldwindow/images/**'
+        include 'gov/nasa/worldwindx/examples/data/**'
+        include 'gov/nasa/worldwindx/examples/images/**'
+    }
+}
+// Copy worldwindx jar to project-directory.
+extensionsJar.doLast {
+    copy {
+        from "$buildDir/libs/${extensionsJar.archiveName}"
+        into "${project.projectDir}"
+    }
+}
+
+artifacts {
+    archives extensionsJar
+}
+
+test {
+    dependsOn jar
+    classpath += project.files("$buildDir/libs/${jar.archiveName}", configurations.runtime)
+}
+
+javadoc {
+    options {
+        overview = "${project.projectDir}/src/overview.html"
+        windowTitle = 'WorldWindJava API'
+        title = 'NASA WorldWind Java-Community Edition'
+        header = 'NASA WorldWind-CE'
+        splitIndex = true
+        noDeprecated = true
+        version = false
+        author = false
+        use = true
+    }
+    exclude 'com/**'
+    exclude 'gov/nasa/worldwind/formats/**'
+}

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'worldwind'