1 files changed, 74 insertions, 0 deletions
diff --git a/vpp-integration/api-docs/core/src/main/java/io/fd/hc2vpp/docs/core/CoverageScanner.java b/vpp-integration/api-docs/core/src/main/java/io/fd/hc2vpp/docs/core/CoverageScanner.java
new file mode 100644
index 000000000..c1c67d77b
--- /dev/null
+++ b/vpp-integration/api-docs/core/src/main/java/io/fd/hc2vpp/docs/core/CoverageScanner.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.hc2vpp.docs.core;
+
+
+import static java.lang.String.format;
+
+import io.fd.hc2vpp.docs.api.Operation;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+import org.objectweb.asm.ClassReader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Scans provided class for reference under specified crud method
+ */
+public class CoverageScanner {
+
+    private static final Logger LOG = LoggerFactory.getLogger(CoverageScanner.class);
+
+    private final Class<?> classToScan;
+    private final Operation.CrudOperation crudOperation;
+    private final Class<?> referenceClass;
+
+    public CoverageScanner(final Class<?> classToScan,
+                           final Operation.CrudOperation crudOperation,
+                           final Class<?> referenceClass) {
+        this.classToScan = classToScan;
+        this.crudOperation = crudOperation;
+        this.referenceClass = referenceClass;
+    }
+
+    static ClassReader loadClass(String className) {
+        try (InputStream classStream =
+                     CoverageScanner.class.getClassLoader().getResourceAsStream(className + ".class")) {
+            return new ClassReader(classStream);
+        } catch (IOException e) {
+            throw new IllegalStateException(format("Unable to load bytecode for class %s", className), e);
+        }
+    }
+
+    public Set<PluginMethodReference> scan() {
+        LOG.debug("Scanning class {}", classToScan.getName());
+        final ClassReader classReader = loadClass(byteCodeStyleReference(classToScan.getName()));
+        final Set<PluginMethodReference> foundReferences = Collections.synchronizedSet(new HashSet<>());
+        classReader.accept(new MethodDelegatingClassVisitor(byteCodeStyleReference(classToScan.getName()),
+                crudOperation.getMethodReference(), byteCodeStyleReference(referenceClass.getPackage().getName()),
+                foundReferences, null), ClassReader.SKIP_DEBUG);
+        return foundReferences;
+    }
+
+    // converts java style reference to bytecode-style name(with slashes instead of dots)
+    private static String byteCodeStyleReference(final String javaStyleName) {
+        return javaStyleName.replace(".", "/");
+    }
+}