[java] navigation, presentation, and "go to symbol" provider for modules

java/java-impl/src/com/intellij/ide/util/gotoByName/JavaModuleNavigationContributor.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2000-2016 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 com.intellij.ide.util.gotoByName
+
+import com.intellij.navigation.ChooseByNameContributor
+import com.intellij.navigation.NavigationItem
+import com.intellij.openapi.project.Project
+import com.intellij.psi.impl.java.stubs.index.JavaModuleNameIndex
+import com.intellij.psi.search.ProjectScope
+import com.intellij.util.ArrayUtil
+
+class JavaModuleNavigationContributor : ChooseByNameContributor {
+  private val index = JavaModuleNameIndex.getInstance()
+
+  override fun getNames(project: Project, includeNonProjectItems: Boolean): Array<out String> {
+    val result = index.getAllKeys(project)
+    return if (result.isEmpty()) ArrayUtil.EMPTY_STRING_ARRAY else result.toTypedArray()
+  }
+
+  override fun getItemsByName(name: String, pattern: String, project: Project, includeNonProjectItems: Boolean): Array<out NavigationItem> {
+    val scope = if (includeNonProjectItems) ProjectScope.getAllScope(project) else ProjectScope.getProjectScope(project)
+    val result = index.get(name, project, scope)
+    return if (result.isEmpty()) NavigationItem.EMPTY_NAVIGATION_ITEM_ARRAY else result.toTypedArray()
+  }
+}