Implementation of Kotlin's 'target' annotation mapping to Java's 'Target' annotation + tests

core/descriptors/src/org/jetbrains/kotlin/descriptors/annotations/AnnotationTarget.kt

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+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.kotlin.descriptors.annotations
+
+import java.util.*
+import kotlin.annotation
+
+// NOTE: this enum must have the same entries with kotlin.annotation.AnnotationTarget
+public enum class AnnotationTarget(val description: String, val isDefault: Boolean = true) {
+    PACKAGE("package"),
+    CLASSIFIER("classifier"),
+    ANNOTATION_CLASS("annotation class"),
+    TYPE_PARAMETER("type parameter", false),
+    PROPERTY("property"),
+    FIELD("field"),
+    LOCAL_VARIABLE("local variable"),
+    VALUE_PARAMETER("value parameter"),
+    CONSTRUCTOR("constructor"),
+    FUNCTION("function"),
+    PROPERTY_GETTER("getter"),
+    PROPERTY_SETTER("setter"),
+    TYPE("type usage", false),
+    EXPRESSION("expression", false),
+    FILE("file", false);
+
+    companion object {
+
+        private val map = HashMap<String, AnnotationTarget>()
+
+        init {
+            for (target in AnnotationTarget.values()) {
+                map[target.name()] = target
+            }
+        }
+
+        public fun valueOrNull(name: String): AnnotationTarget? = map[name]
+
+        public val DEFAULT_TARGET_SET: Set<AnnotationTarget> = values().filter { it.isDefault }.toSet()
+
+        public val ALL_TARGET_SET: Set<AnnotationTarget> = values().toSet()
+
+    }
+}