[jvm-lang] add JvmClass#findMethodsByName

java/java-psi-api/src/com/intellij/lang/jvm/JvmClass.java

@@ -1,21 +1,8 @@
-/*
- * Copyright 2000-2017 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.
- */
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.lang.jvm;
 
 import com.intellij.lang.jvm.types.JvmReferenceType;
+import com.intellij.lang.jvm.util.JvmClassDefaults;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -70,6 +57,15 @@ public interface JvmClass extends JvmTypeParametersOwner, JvmTypeDeclaration {
   @NotNull
   JvmMethod[] getMethods();
 
+  /**
+   * @return methods (excluding inherited) with the specified name
+   * @see Class#getDeclaredMethod
+   */
+  @NotNull
+  default JvmMethod[] findMethodsByName(@NotNull String methodName) {
+    return JvmClassDefaults.findMethodsByName(this, methodName);
+  }
+
   /**
    * @return all (static, private, etc) fields declared by this class but excluding inherited ones
    * @see Class#getDeclaredFields

java/java-psi-api/src/com/intellij/lang/jvm/JvmMethod.java

@@ -15,6 +15,8 @@ import org.jetbrains.annotations.Nullable;
  */
 public interface JvmMethod extends JvmTypeParametersOwner {
 
+  JvmMethod[] EMPTY_ARRAY = new JvmMethod[0];
+
   /**
    * @return {@code true} if this method is a constructor
    */

java/java-psi-api/src/com/intellij/lang/jvm/util/JvmClassDefaults.java

@@ -0,0 +1,24 @@
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package com.intellij.lang.jvm.util;
+
+import com.intellij.lang.jvm.JvmClass;
+import com.intellij.lang.jvm.JvmMethod;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+import static com.intellij.util.containers.ContainerUtil.filter;
+
+/**
+ * This class holds default implementations of {@link JvmClass} methods.
+ */
+public class JvmClassDefaults {
+
+  private JvmClassDefaults() {}
+
+  @NotNull
+  public static JvmMethod[] findMethodsByName(@NotNull JvmClass clazz, @NotNull String methodName) {
+    List<JvmMethod> result = filter(clazz.getMethods(), it -> it.getName().equals(methodName));
+    return result.toArray(JvmMethod.EMPTY_ARRAY);
+  }
+}

java/java-psi-api/src/com/intellij/psi/PsiClass.java

@@ -1,22 +1,9 @@
-/*
- * Copyright 2000-2017 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.
- */
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.psi;
 
 import com.intellij.lang.jvm.JvmClass;
 import com.intellij.lang.jvm.JvmClassKind;
+import com.intellij.lang.jvm.JvmMethod;
 import com.intellij.lang.jvm.types.JvmReferenceType;
 import com.intellij.openapi.util.Pair;
 import com.intellij.pom.PomRenameableTarget;
@@ -244,6 +231,12 @@ public interface PsiClass
   @NotNull
   PsiMethod[] findMethodsBySignature(PsiMethod patternMethod, boolean checkBases);
 
+  @NotNull
+  @Override
+  default JvmMethod[] findMethodsByName(@NotNull String methodName) {
+    return findMethodsByName(methodName, false);
+  }
+
   /**
    * Searches the class (and optionally its superclasses) for the methods with the specified name.
    *