1 files changed, 102 insertions, 0 deletions
diff --git a/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/performance/DynamicRegexReplaceableByCompiledPatternInspectionBase.java b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/performance/DynamicRegexReplaceableByCompiledPatternInspectionBase.java
new file mode 100644
index 000000000000..86e5f9c3cfe2
--- /dev/null
+++ b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/performance/DynamicRegexReplaceableByCompiledPatternInspectionBase.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2000-2013 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.performance;
+
+import com.intellij.psi.*;
+import com.intellij.psi.util.PsiUtil;
+import com.siyeh.InspectionGadgetsBundle;
+import com.siyeh.ig.BaseInspection;
+import com.siyeh.ig.BaseInspectionVisitor;
+import org.jetbrains.annotations.Nls;
+import org.jetbrains.annotations.NonNls;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collection;
+import java.util.HashSet;
+
+public class DynamicRegexReplaceableByCompiledPatternInspectionBase extends BaseInspection {
+  @NonNls
+  protected static final Collection<String> regexMethodNames = new HashSet<String>(4);
+  static {
+    regexMethodNames.add("matches");
+    regexMethodNames.add("replaceFirst");
+    regexMethodNames.add("replaceAll");
+    regexMethodNames.add("split");
+  }
+
+  @Override
+  @Nls
+  @NotNull
+  public String getDisplayName() {
+    return InspectionGadgetsBundle.message(
+      "dynamic.regex.replaceable.by.compiled.pattern.display.name");
+  }
+
+  @Override
+  @NotNull
+  protected String buildErrorString(Object... infos) {
+    return InspectionGadgetsBundle.message(
+      "dynamic.regex.replaceable.by.compiled.pattern.problem.descriptor");
+  }
+
+  @Override
+  protected boolean buildQuickFixesOnlyForOnTheFlyErrors() {
+    return true;
+  }
+
+  @Override
+  public BaseInspectionVisitor buildVisitor() {
+    return new DynamicRegexReplaceableByCompiledPatternVisitor();
+  }
+
+  private static class DynamicRegexReplaceableByCompiledPatternVisitor extends BaseInspectionVisitor {
+
+    @Override
+    public void visitMethodCallExpression(PsiMethodCallExpression expression) {
+      super.visitMethodCallExpression(expression);
+      if (!isCallToRegexMethod(expression)) {
+        return;
+      }
+      registerMethodCallError(expression);
+    }
+
+
+    private static boolean isCallToRegexMethod(PsiMethodCallExpression expression) {
+      final PsiReferenceExpression methodExpression = expression.getMethodExpression();
+      final String name = methodExpression.getReferenceName();
+      if (!regexMethodNames.contains(name)) {
+        return false;
+      }
+      final PsiExpressionList argumentList = expression.getArgumentList();
+      final PsiExpression[] arguments = argumentList.getExpressions();
+      for (PsiExpression argument : arguments) {
+        if (!PsiUtil.isConstantExpression(argument)) {
+          return false;
+        }
+      }
+      final PsiMethod method = expression.resolveMethod();
+      if (method == null) {
+        return false;
+      }
+      final PsiClass containingClass = method.getContainingClass();
+      if (containingClass == null) {
+        return false;
+      }
+      final String className = containingClass.getQualifiedName();
+      return CommonClassNames.JAVA_LANG_STRING.equals(className);
+    }
+  }
+}