Objects.#ref() on arrays should probably be 'Arrays.equals()' #loc
array.objects.deep.equals.problem.descriptor=Objects.#ref() on arrays should probably be 'Arrays.deepEquals()' #loc
extends.throwable.display.name=Class directly extends 'java.lang.Throwable'
-anonymous.extends.throwable.problem.descriptor=Anonymous class directly extends 'java.lang.Throwable' \#loc
-extends.throwable.problem.descriptor=class \#ref directly extends 'java.lang.Throwable' \#loc
\ No newline at end of file
+anonymous.extends.throwable.problem.descriptor=Anonymous class directly extends 'java.lang.Throwable' #loc
+extends.throwable.problem.descriptor=class #ref directly extends 'java.lang.Throwable' #loc
+lambda.parameter.naming.convention.display.name=Lambda parameter naming convention
+lambda.parameter.naming.convention.problem.descriptor.short=Lambda parameter name #ref is too short #loc
+lambda.parameter.naming.convention.problem.descriptor.long=Lambda parameter name #ref is too long #loc
+lambda.parameter.naming.convention.problem.descriptor.regex.mismatch=Lambda parameter name #ref doesn''t match regex ''{0}'' #loc
+
diff --git a/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/naming/LambdaParameterNamingConventionInspectionBase.java b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/naming/LambdaParameterNamingConventionInspectionBase.java
new file mode 100644
index 000000000000..6434ba6a21bc
--- /dev/null
+++ b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/naming/LambdaParameterNamingConventionInspectionBase.java
@@ -0,0 +1,98 @@
+/*
+ * 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.siyeh.ig.naming;
+
+import com.intellij.psi.*;
+import com.siyeh.InspectionGadgetsBundle;
+import com.siyeh.ig.BaseInspectionVisitor;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author Bas Leijdekkers
+ */
+public class LambdaParameterNamingConventionInspectionBase extends ConventionInspection {
+
+ private static final int DEFAULT_MIN_LENGTH = 1;
+ private static final int DEFAULT_MAX_LENGTH = 20;
+
+ @Override
+ @NotNull
+ public String getID() {
+ return "LambdaParameterNamingConvention";
+ }
+
+ @Override
+ @NotNull
+ public String getDisplayName() {
+ return InspectionGadgetsBundle.message("lambda.parameter.naming.convention.display.name");
+ }
+
+ @Override
+ protected boolean buildQuickFixesOnlyForOnTheFlyErrors() {
+ return true;
+ }
+
+ @Override
+ @NotNull
+ public String buildErrorString(Object... infos) {
+ final String parameterName = (String)infos[0];
+ if (parameterName.length() < getMinLength()) {
+ return InspectionGadgetsBundle.message("lambda.parameter.naming.convention.problem.descriptor.short");
+ }
+ else if (parameterName.length() > getMaxLength()) {
+ return InspectionGadgetsBundle.message("lambda.parameter.naming.convention.problem.descriptor.long");
+ }
+ else {
+ return InspectionGadgetsBundle.message("lambda.parameter.naming.convention.problem.descriptor.regex.mismatch", getRegex());
+ }
+ }
+
+ @Override
+ protected String getDefaultRegex() {
+ return "[a-z][A-Za-z\\d]*";
+ }
+
+ @Override
+ protected int getDefaultMinLength() {
+ return DEFAULT_MIN_LENGTH;
+ }
+
+ @Override
+ protected int getDefaultMaxLength() {
+ return DEFAULT_MAX_LENGTH;
+ }
+
+ @Override
+ public BaseInspectionVisitor buildVisitor() {
+ return new NamingConventionsVisitor();
+ }
+
+ private class NamingConventionsVisitor extends BaseInspectionVisitor {
+
+ @Override
+ public void visitParameter(@NotNull PsiParameter variable) {
+ final PsiElement scope = variable.getDeclarationScope();
+ if (!(scope instanceof PsiLambdaExpression)) {
+ return;
+ }
+ final String name = variable.getName();
+ if (name == null || isValid(name)) {
+ return;
+ }
+ registerVariableError(variable, name);
+ }
+ }
+}
diff --git a/plugins/InspectionGadgets/src/com/siyeh/ig/naming/LambdaParameterNamingConventionInspection.java b/plugins/InspectionGadgets/src/com/siyeh/ig/naming/LambdaParameterNamingConventionInspection.java
new file mode 100644
index 000000000000..036aeda24bb2
--- /dev/null
+++ b/plugins/InspectionGadgets/src/com/siyeh/ig/naming/LambdaParameterNamingConventionInspection.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2003-2015 Dave Griffith, Bas Leijdekkers
+ *
+ * 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.siyeh.ig.naming;
+
+import com.siyeh.ig.InspectionGadgetsFix;
+import com.siyeh.ig.fixes.RenameFix;
+
+/**
+ * @author Bas Leijdekkers
+ */
+public class LambdaParameterNamingConventionInspection extends LambdaParameterNamingConventionInspectionBase {
+
+ @Override
+ protected InspectionGadgetsFix buildFix(Object... infos) {
+ return new RenameFix();
+ }
+}
\ No newline at end of file
diff --git a/plugins/InspectionGadgets/src/inspectionDescriptions/LambdaParameterNamingConvention.html b/plugins/InspectionGadgets/src/inspectionDescriptions/LambdaParameterNamingConvention.html
new file mode 100644
index 000000000000..79adb48a71d9
--- /dev/null
+++ b/plugins/InspectionGadgets/src/inspectionDescriptions/LambdaParameterNamingConvention.html
@@ -0,0 +1,13 @@
+
+
+Reports lambda parameters whose names are either too short, too long, or do not follow
+the specified regular expression pattern.
+
++Use the fields below to specify minimum length, maximum length and regular expression expected for method parameter names. +Specify 0 to not check the length of names. Regular expressions are in standard java.util.regex format. +
+New in 15 +
+
+
\ No newline at end of file
diff --git a/plugins/InspectionGadgets/test/com/siyeh/igtest/naming/lambda_parameter_naming_convention/LambdaParameterNamingConvention.java b/plugins/InspectionGadgets/test/com/siyeh/igtest/naming/lambda_parameter_naming_convention/LambdaParameterNamingConvention.java
new file mode 100644
index 000000000000..02fd7e3fd974
--- /dev/null
+++ b/plugins/InspectionGadgets/test/com/siyeh/igtest/naming/lambda_parameter_naming_convention/LambdaParameterNamingConvention.java
@@ -0,0 +1,12 @@
+public class LambdaParameterNamingConvention {
+
+ void m(int a) {}
+ void n(int abcd) {
+ F f = (