[ClavaAst] Adds utility class ClavaData for #pragma clava data (#41)

ClavaAst/src/pt/up/fe/specs/clava/ast/pragma/ClavaData.java

@@ -0,0 +1,82 @@
+/**
+ * Copyright 2021 SPeCS.
+ * 
+ * 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. under the License.
+ */
+
+package pt.up.fe.specs.clava.ast.pragma;
+
+import java.util.Arrays;
+
+import pt.up.fe.specs.clava.ClavaNode;
+import pt.up.fe.specs.clava.ClavaNodes;
+import pt.up.fe.specs.util.stringsplitter.StringSplitter;
+import pt.up.fe.specs.util.stringsplitter.StringSplitterRules;
+import pt.up.fe.specs.util.treenode.NodeInsertUtils;
+
+/**
+ * Methods related with the #pragma clava data
+ * 
+ * @author JBispo
+ *
+ */
+public class ClavaData {
+
+    private static final String KEYWORD_DATA = "data";
+
+    /**
+     * 
+     * 
+     * @param node
+     * @return if a pragma clava data exists that is associated with this node, returns it; otherwise returns null.
+     */
+    public static Pragma getClavaData(ClavaNode node) {
+
+        for (var pragma : ClavaNodes.getPragmas(node)) {
+
+            if (!pragma.getName().toLowerCase().equals("clava")) {
+                continue;
+            }
+
+            // Parse content
+            StringSplitter splitter = new StringSplitter(pragma.getContent());
+            boolean isDataDirective = splitter.parseTry(StringSplitterRules::string)
+                    .filter(string -> string.toLowerCase().equals(KEYWORD_DATA))
+                    .isPresent();
+
+            if (!isDataDirective) {
+                continue;
+            }
+
+            return pragma;
+        }
+
+        return null;
+    }
+
+    /**
+     * 
+     * @param node
+     * @return if node can accept a pragma, builds a new pragma clava data and inserts it before the node, returning the
+     *         pragma. Otherwise, returns null
+     */
+    public static Pragma buildClavaData(ClavaNode node) {
+        if (!ClavaNodes.acceptsPragmas(node)) {
+            return null;
+        }
+
+        var pragma = node.getFactory().genericPragma(Arrays.asList("clava data"));
+
+        NodeInsertUtils.insertBefore(node, pragma);
+
+        return pragma;
+    }
+
+}