WI-26500 Remote interpreter allow user to check path mappings inside configuration form

platform/platform-impl/src/com/intellij/remote/PathMappingProvider.java

@@ -28,6 +28,9 @@ public abstract class PathMappingProvider {
       }));
   }
 
+  @NotNull
+  public abstract String getProviderPresentableName(@NotNull RemoteSdkAdditionalData data);
+
   public abstract boolean accepts(@Nullable RemoteSdkAdditionalData data);
 
   @NotNull

platform/platform-impl/src/com/intellij/remote/PathMappingValidator.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2000-2015 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 com.intellij.remote;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.util.SmartList;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+/**
+ * @author Svetlana.Zemlyanskaya
+ */
+public class PathMappingValidator {
+  public static String validatePathMappings(@NotNull Project project, @NotNull RemoteSdkAdditionalData data) {
+    boolean found = false;
+    final List<String> locations = new SmartList<String>();
+    for (PathMappingProvider mappingProvider : PathMappingProvider.getSuitableMappingProviders(data)) {
+      found = found || !mappingProvider.getPathMappingSettings(project, data).isEmpty();
+      locations.add(mappingProvider.getProviderPresentableName(data));
+    }
+
+    if (!found) {
+      final StringBuilder builder = new StringBuilder();
+      builder.append("No path mappings were found.");
+      if (!locations.isEmpty()) {
+        builder.append(" Please, configure them at ").append(StringUtil.join(locations, " or "));
+      }
+      return builder.toString();
+    }
+    return null;
+  }
+}