linter: sparse-array
diff --git a/linter/src/main/java/org/apache/royale/linter/LINTER.java b/linter/src/main/java/org/apache/royale/linter/LINTER.java
index 03d6c05..e8ca277 100644
--- a/linter/src/main/java/org/apache/royale/linter/LINTER.java
+++ b/linter/src/main/java/org/apache/royale/linter/LINTER.java
@@ -79,6 +79,7 @@
import org.apache.royale.linter.rules.NumericLeadingZeroesRule;
import org.apache.royale.linter.rules.OverrideContainsOnlySuperCallRule;
import org.apache.royale.linter.rules.PackageNameRule;
+import org.apache.royale.linter.rules.SparseArrayRule;
import org.apache.royale.linter.rules.StaticConstantsRule;
import org.apache.royale.linter.rules.StrictEqualityRule;
import org.apache.royale.linter.rules.StringEventNameRule;
@@ -347,6 +348,9 @@
if (configuration.getPackageName()) {
rules.add(new PackageNameRule());
}
+ if (configuration.getSparseArray()) {
+ rules.add(new SparseArrayRule());
+ }
if (configuration.getStaticConstants()) {
rules.add(new StaticConstantsRule());
}
diff --git a/linter/src/main/java/org/apache/royale/linter/config/Configuration.java b/linter/src/main/java/org/apache/royale/linter/config/Configuration.java
index 7aac037..0e02a0e 100644
--- a/linter/src/main/java/org/apache/royale/linter/config/Configuration.java
+++ b/linter/src/main/java/org/apache/royale/linter/config/Configuration.java
@@ -715,6 +715,22 @@
}
//
+ // 'sparse-array' option
+ //
+
+ private boolean sparseArray = false;
+
+ public boolean getSparseArray() {
+ return sparseArray;
+ }
+
+ @Config
+ @Mapping("sparse-array")
+ public void setSparseArray(ConfigurationValue cv, boolean b) {
+ this.sparseArray = b;
+ }
+
+ //
// 'static-constants' option
//
diff --git a/linter/src/main/java/org/apache/royale/linter/rules/SparseArrayRule.java b/linter/src/main/java/org/apache/royale/linter/rules/SparseArrayRule.java
new file mode 100644
index 0000000..a6a7236
--- /dev/null
+++ b/linter/src/main/java/org/apache/royale/linter/rules/SparseArrayRule.java
@@ -0,0 +1,75 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You 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.apache.royale.linter.rules;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.royale.compiler.internal.tree.as.ContainerNode;
+import org.apache.royale.compiler.problems.CompilerProblem;
+import org.apache.royale.compiler.problems.ICompilerProblem;
+import org.apache.royale.compiler.tree.ASTNodeID;
+import org.apache.royale.compiler.tree.as.IASNode;
+import org.apache.royale.compiler.tree.as.ILiteralContainerNode;
+import org.apache.royale.compiler.tree.as.ILiteralNode.LiteralType;
+import org.apache.royale.linter.LinterRule;
+import org.apache.royale.linter.NodeVisitor;
+import org.apache.royale.linter.TokenQuery;
+
+/**
+ * Check that an array literal contains no empty slots (multiple repeating commas with no values).
+ */
+public class SparseArrayRule extends LinterRule {
+ @Override
+ public Map<ASTNodeID, NodeVisitor> getNodeVisitors() {
+ Map<ASTNodeID, NodeVisitor> result = new HashMap<>();
+ result.put(ASTNodeID.ArrayLiteralID, (node, tokenQuery, problems) -> {
+ checkLiteralContainerNode((ILiteralContainerNode) node, tokenQuery, problems);
+ });
+ return result;
+ }
+
+ private void checkLiteralContainerNode(ILiteralContainerNode arrayLiteralNode, TokenQuery tokenQuery, Collection<ICompilerProblem> problems) {
+ if (!LiteralType.ARRAY.equals(arrayLiteralNode.getLiteralType())) {
+ return;
+ }
+ ContainerNode contentsNode = arrayLiteralNode.getContentsNode();
+ if (contentsNode == null) {
+ return;
+ }
+ for (int i = 0; i < contentsNode.getChildCount(); i++) {
+ IASNode child = contentsNode.getChild(i);
+ if (ASTNodeID.NilID.equals(child.getNodeID())) {
+ problems.add(new SparseArrayLinterProblem(arrayLiteralNode));
+ return;
+ }
+ }
+ }
+
+ public static class SparseArrayLinterProblem extends CompilerProblem {
+ public static final String DESCRIPTION = "Array literals must not be sparse";
+
+ public SparseArrayLinterProblem(ILiteralContainerNode node)
+ {
+ super(node);
+ }
+ }
+}
