1 files changed, 135 insertions, 0 deletions
diff --git a/builder/src/main/java/com/android/builder/compiling/BuildConfigGenerator.java b/builder/src/main/java/com/android/builder/compiling/BuildConfigGenerator.java
new file mode 100644
index 0000000..1e298b4
--- /dev/null
+++ b/builder/src/main/java/com/android/builder/compiling/BuildConfigGenerator.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed 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.android.builder.compiling;
+
+import com.android.annotations.NonNull;
+import com.android.annotations.Nullable;
+import com.android.builder.AndroidBuilder;
+import com.android.builder.model.ClassField;
+import com.google.common.collect.Lists;
+import com.squareup.javawriter.JavaWriter;
+
+import javax.lang.model.element.Modifier;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.Collection;
+import java.util.EnumSet;
+import java.util.List;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Class able to generate a BuildConfig class in Android project.
+ * The BuildConfig class contains constants related to the build target.
+ */
+public class BuildConfigGenerator {
+
+    public final static String BUILD_CONFIG_NAME = "BuildConfig.java";
+
+    private final String mGenFolder;
+    private final String mBuildConfigPackageName;
+
+    private final List<ClassField> mFields = Lists.newArrayList();
+    private List<Object> mItems = Lists.newArrayList();
+
+    /**
+     * Creates a generator
+     * @param genFolder the gen folder of the project
+     * @param buildConfigPackageName the package in which to create the class.
+     */
+    public BuildConfigGenerator(@NonNull String genFolder, @NonNull String buildConfigPackageName) {
+        mGenFolder = checkNotNull(genFolder);
+        mBuildConfigPackageName = checkNotNull(buildConfigPackageName);
+    }
+
+    public BuildConfigGenerator addField(
+            @NonNull String type, @NonNull String name, @NonNull String value) {
+        mFields.add(AndroidBuilder.createClassField(type, name, value));
+        return this;
+    }
+
+    public BuildConfigGenerator addItems(@Nullable Collection<Object> items) {
+        if (items != null) {
+            mItems.addAll(items);
+        }
+        return this;
+    }
+
+    /**
+     * Returns a File representing where the BuildConfig class will be.
+     */
+    public File getFolderPath() {
+        File genFolder = new File(mGenFolder);
+        return new File(genFolder, mBuildConfigPackageName.replace('.', File.separatorChar));
+    }
+
+    public File getBuildConfigFile() {
+        File folder = getFolderPath();
+        return new File(folder, BUILD_CONFIG_NAME);
+    }
+
+    /**
+     * Generates the BuildConfig class.
+     */
+    public void generate() throws IOException {
+        File pkgFolder = getFolderPath();
+        if (!pkgFolder.isDirectory()) {
+            if (!pkgFolder.mkdirs()) {
+                throw new RuntimeException("Failed to create " + pkgFolder.getAbsolutePath());
+            }
+        }
+
+        File buildConfigJava = new File(pkgFolder, BUILD_CONFIG_NAME);
+        FileWriter out = new FileWriter(buildConfigJava);
+
+        JavaWriter writer = new JavaWriter(out);
+
+        Set<Modifier> publicFinal = EnumSet.of(Modifier.PUBLIC, Modifier.FINAL);
+        Set<Modifier> publicFinalStatic = EnumSet.of(Modifier.PUBLIC, Modifier.FINAL, Modifier.STATIC);
+
+        writer.emitJavadoc("Automatically generated file. DO NOT MODIFY")
+                .emitPackage(mBuildConfigPackageName)
+                .beginType("BuildConfig", "class", publicFinal);
+
+        for (ClassField field : mFields) {
+            writer.emitField(
+                    field.getType(),
+                    field.getName(),
+                    publicFinalStatic,
+                    field.getValue());
+        }
+
+        for (Object item : mItems) {
+            if (item instanceof ClassField) {
+                ClassField field = (ClassField)item;
+                writer.emitField(
+                        field.getType(),
+                        field.getName(),
+                        publicFinalStatic,
+                        field.getValue());
+
+            } else if (item instanceof String) {
+                writer.emitSingleLineComment((String) item);
+            }
+        }
+
+        writer.endType();
+
+        out.close();
+    }
+}