1 files changed, 74 insertions, 0 deletions
diff --git a/vpp-integration/api-docs/core/src/main/java/io/fd/hc2vpp/docs/core/ClassPathTypeIndex.java b/vpp-integration/api-docs/core/src/main/java/io/fd/hc2vpp/docs/core/ClassPathTypeIndex.java
new file mode 100644
index 000000000..e204d6321
--- /dev/null
+++ b/vpp-integration/api-docs/core/src/main/java/io/fd/hc2vpp/docs/core/ClassPathTypeIndex.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 java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+
+/**
+ * Index of java classes to relative absolute paths within repository. Used to generate Git links for binding classes of
+ * VPP apis
+ */
+public class ClassPathTypeIndex implements LinkGenerator {
+
+    private static final String JAVA_SOURCE_FOLDER = "src/main/java";
+    private static final int JAVA_SOURCE_FOLDER_NAME_LENGTH = JAVA_SOURCE_FOLDER.length() + 1;
+
+    /**
+     * <li>key - fully qualified class name value</li><li>value - path within codebase/repository</li>
+     */
+    private final Map<String, String> index;
+
+    public ClassPathTypeIndex(final String projectRoot, final String version) {
+        index = buildIndex(projectRoot, version);
+    }
+
+    /**
+     * <li>input format - LOCAL_ROOT/hc2vpp/module/src/main/java/fully/qualified/class/name/Class.java</li><li>output
+     * format - fully.qualified.class.name.Class</li>
+     */
+    private static String key(String raw) {
+        return raw.substring(raw.indexOf(JAVA_SOURCE_FOLDER) + JAVA_SOURCE_FOLDER_NAME_LENGTH)
+                .replace("/", ".")
+                .replace(".java", "");
+    }
+
+    public String linkForClass(final String clazz) {
+        return index.get(clazz.replace("/", "."));
+    }
+
+    private Map<String, String> buildIndex(final String projectRoot, final String version) {
+        try {
+            return Files.walk(Paths.get(projectRoot))
+                    .filter(path -> path.toString().contains("src/main/java"))
+                    .filter(path -> path.toString().endsWith(".java"))
+                    .map(Path::toString)
+                    .map(s -> s.replace(projectRoot, ""))
+                    .distinct()
+                    .collect(Collectors.toMap(ClassPathTypeIndex::key, o -> generateLink(o, version)));
+        } catch (IOException e) {
+            throw new IllegalStateException(format("%s not found", projectRoot), e);
+        }
+    }
+}