Merge branch 'master' into trifonov/console-log-release

Author: vtrifonov

test-app/build-tools/static-binding-generator/src/main/java/org/nativescript/staticbindinggenerator/Generator.java

@@ -8,6 +8,7 @@
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.PrintStream;
+import java.nio.charset.Charset;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.ArrayDeque;
@@ -17,6 +18,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Queue;
+import java.util.Scanner;
 import java.util.Set;
 import java.util.jar.JarInputStream;
 import java.util.zip.ZipEntry;
@@ -33,6 +35,15 @@ public class Generator {
 
     private static final String DEFAULT_PACKAGE_NAME = "com.tns.gen";
 
+    private static final String LINE_SEPARATOR = System.getProperty("line.separator");
+
+    private static final String AUTO_GENERATED_FILE_PROLOGUE =
+        "/* AUTO-GENERATED FILE. DO NOT MODIFY." + LINE_SEPARATOR +
+        " * This class was automatically generated by the" + LINE_SEPARATOR +
+        " * static binding generator from the resources it found." + LINE_SEPARATOR +
+        " * Please do not modify by hand." + LINE_SEPARATOR +
+        " */" + LINE_SEPARATOR;
+
     private final File outputDir;
     private final List<DataRow>  libs;
     private final Map<String, JavaClass> classes;
@@ -48,11 +59,13 @@ public Generator(File outputDir, List<DataRow> libs, boolean throwOnError) throw
     }
 
     public void writeBindings(String filename) throws IOException, ClassNotFoundException {
+        this.cleanPreviouslyAutoGeneratedFiles(this.outputDir);
         Binding[] bindings = generateBindings(filename);
         Set<File> writtenFiles = new HashSet<File>();
         for (Binding b : bindings) {
             if (writtenFiles.add(b.getFile())) {
                 try (PrintStream ps = new PrintStream(b.getFile())) {
+                    ps.append(AUTO_GENERATED_FILE_PROLOGUE);
                     ps.append(b.getContent());
                 }
                 // A file with that name has already been written
@@ -747,4 +760,55 @@ public List<Method> getList() {
             return this.methods;
         }
     }
+
+    private void cleanPreviouslyAutoGeneratedFiles(File folder) {
+        // Recursively traverse all files in the output folder and
+        // remove them if they were auto-generated from a previous run
+        // of the static binding generator. This will ensure that if
+        // some javascript files containing native extends are removed,
+        // their corresponding java classes will also be removed.
+        File[] files = folder.listFiles();
+        for (File file: files) {
+            if (file.isDirectory()) {
+                this.cleanPreviouslyAutoGeneratedFiles(file);
+            } else if ("java".equalsIgnoreCase(this.getFileExtension(file.toString()))) {
+                String fileContents = this.readFile(file);
+                if (fileContents.startsWith(AUTO_GENERATED_FILE_PROLOGUE)) {
+                    file.delete();
+                }
+            }
+        }
+    }
+
+    private String getFileExtension(String filename) {
+        String extension = "";
+
+        int i = filename.lastIndexOf('.');
+        if (i > 0) {
+            extension = filename.substring(i + 1);
+        }
+
+        return extension;
+    }
+
+    private String readFile(File file) {
+        Scanner scanner = null;
+        try {
+            StringBuilder fileContents = new StringBuilder((int) file.length());
+            scanner = new Scanner(file);
+
+            while (scanner.hasNextLine()) {
+                fileContents.append(scanner.nextLine() + LINE_SEPARATOR);
+            }
+
+            return fileContents.toString();
+        } catch (IOException e) {
+            e.printStackTrace();
+            return "";
+        } finally {
+            if (scanner != null) {
+                scanner.close();
+            }
+        }
+    }
 }