Patcher with test

src/main/java/org/cqfn/astranaut/core/algorithms/patching/DefaultPatcher.java

@@ -0,0 +1,52 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2024 Ivan Kniazkov
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cqfn.astranaut.core.algorithms.patching;
+
+import java.util.Set;
+import org.cqfn.astranaut.core.DifferenceNode;
+import org.cqfn.astranaut.core.Node;
+import org.cqfn.astranaut.core.utils.deserializer.ActionList;
+
+/**
+ * Default algorithm that applies patches, i.e. makes some changes in the syntax tree
+ * based on patterns describing such changes. Patterns are differential trees.
+ *
+ * @since 1.1.5
+ */
+public final class DefaultPatcher implements Patcher {
+    @Override
+    public Node patch(final Node source, final DifferenceNode pattern) {
+        final PatternMatcher matcher = new PatternMatcher(source);
+        final Set<Node> nodes = matcher.match(pattern);
+        final Node result;
+        if (nodes.isEmpty()) {
+            result = source;
+        } else {
+            final ActionList actions = matcher.getActionList();
+            final DifferenceNode diff = actions.convertTreeToDifferenceTree(source);
+            result = diff.getAfter();
+        }
+        return result;
+    }
+}

src/test/java/org/cqfn/astranaut/core/algorithms/patching/PatcherTest.java

@@ -0,0 +1,55 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2024 Ivan Kniazkov
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cqfn.astranaut.core.algorithms.patching;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+import org.cqfn.astranaut.core.DifferenceNode;
+import org.cqfn.astranaut.core.DraftNode;
+import org.cqfn.astranaut.core.Node;
+import org.cqfn.astranaut.core.algorithms.DifferenceTreeBuilder;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Testing {@link Patcher} class.
+ *
+ * @since 1.1.5
+ */
+class PatcherTest {
+    @Test
+    void patchPatternWithReplacement() {
+        final Map<String, Set<Node>> nodes = new TreeMap<>();
+        final Node prepattern = DraftNode.createByDescription("A(B, D)", nodes);
+        final DifferenceTreeBuilder builder = new DifferenceTreeBuilder(prepattern);
+        builder.replaceNode(nodes.get("B").iterator().next(), DraftNode.createByDescription("C"));
+        final DifferenceNode pattern = builder.getRoot();
+        final Node tree = DraftNode.createByDescription("X(Y,A(B,D),Z)");
+        final Patcher patcher = new DefaultPatcher();
+        final Node result = patcher.patch(tree, pattern);
+        final Node expected = DraftNode.createByDescription("X(Y,A(C,D),Z)");
+        Assertions.assertTrue(expected.deepCompare(result));
+    }
+}