1 files changed, 136 insertions, 0 deletions
diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/typeEnhancers/MapEntryOrKeyValueHintProcessor.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/typeEnhancers/MapEntryOrKeyValueHintProcessor.java
new file mode 100644
index 000000000000..799d02a50dd0
--- /dev/null
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/typeEnhancers/MapEntryOrKeyValueHintProcessor.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2000-2014 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.plugins.groovy.lang.psi.typeEnhancers;
+
+import com.intellij.openapi.util.Pair;
+import com.intellij.openapi.util.text.StringUtilRt;
+import com.intellij.psi.*;
+import com.intellij.psi.util.InheritanceUtil;
+import com.intellij.psi.util.PsiUtil;
+import com.intellij.util.containers.ContainerUtil;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+/**
+ * Created by Max Medvedev on 28/02/14
+ */
+public class MapEntryOrKeyValueHintProcessor extends SignatureHintProcessor {
+  @Override
+  public String getHintName() {
+    return "groovy.transform.stc.MapEntryOrKeyValue";
+  }
+
+  @NotNull
+  @Override
+  public List<PsiType[]> inferExpectedSignatures(@NotNull PsiMethod method,
+                                                 @NotNull PsiSubstitutor substitutor,
+                                                 @NotNull String[] options) {
+    int argNum = extractArgNum(options);
+    boolean index = extractIndex(options);
+
+    PsiParameter[] parameters = method.getParameterList().getParameters();
+
+    if (argNum >= parameters.length) return ContainerUtil.emptyList();
+
+    PsiParameter parameter = parameters[argNum];
+    PsiType type = parameter.getType();
+    PsiType substituted = substitutor.substitute(type);
+
+    if (!InheritanceUtil.isInheritor(substituted, CommonClassNames.JAVA_UTIL_MAP)) return ContainerUtil.emptyList();
+
+    PsiType key = PsiUtil.substituteTypeParameter(substituted, CommonClassNames.JAVA_UTIL_MAP, 0, true);
+    PsiType value = PsiUtil.substituteTypeParameter(substituted, CommonClassNames.JAVA_UTIL_MAP, 1, true);
+
+    PsiClass mapEntry = JavaPsiFacade.getInstance(method.getProject()).findClass(CommonClassNames.JAVA_UTIL_MAP_ENTRY, method.getResolveScope());
+    if (mapEntry == null) return ContainerUtil.emptyList();
+
+    PsiClassType mapEntryType = JavaPsiFacade.getElementFactory(method.getProject()).createType(mapEntry, key, value);
+
+    PsiType[] keyValueSignature = index ? new PsiType[]{key, value, PsiType.INT} : new PsiType[]{key, value};
+    PsiType[] mapEntrySignature = index ? new PsiType[]{mapEntryType, PsiType.INT} : new PsiType[]{mapEntryType};
+
+    return ContainerUtil.newArrayList(keyValueSignature, mapEntrySignature);
+  }
+
+  private static int extractArgNum(String[] options) {
+
+
+    for (String value : options) {
+      Integer parsedValue = parseArgNum(value);
+      if (parsedValue != null) {
+        return parsedValue;
+      }
+    }
+
+    if (options.length == 1) {
+      return StringUtilRt.parseInt(options[0], 0);
+    }
+
+    return 0;
+  }
+
+  private static boolean extractIndex(String[] options) {
+    for (String value : options) {
+      Boolean parsedValue = parseIndex(value);
+      if (parsedValue != null) {
+        return parsedValue;
+      }
+    }
+
+    if (options.length == 1) {
+      return StringUtilRt.parseBoolean(options[0], false);
+    }
+
+    return false;
+  }
+
+  private static Boolean parseIndex(String value) {
+    Pair<String, String> pair = parseValue(value);
+    if (pair == null) return null;
+
+    Boolean parsedValue = StringUtilRt.parseBoolean(pair.getSecond(), false);
+    if ("index".equals(pair.getFirst())) {
+      return parsedValue;
+    }
+
+    return null;
+  }
+
+  private static Integer parseArgNum(String value) {
+    Pair<String, String> pair = parseValue(value);
+    if (pair == null) return null;
+
+    Integer parsedValue = StringUtilRt.parseInt(pair.getSecond(), 0);
+    if ("argNum".equals(pair.getFirst())) {
+      return parsedValue;
+    }
+
+    return null;
+  }
+
+  @Nullable
+  private static Pair<String, String> parseValue(String value) {
+    String[] splitted = value.split("=");
+
+    if (splitted.length == 2) {
+      return Pair.create(splitted[0].trim(), splitted[1].trim());
+    }
+
+    return null;
+  }
+}