DevTools: [JsDocValidator] Refactor JsDoc annotation checkers

Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingState.java

Index: Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingState.java
diff --git a/Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingState.java b/Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingState.java
new file mode 100644
index 0000000000000000000000000000000000000000..5bb88a127f4fb5c217389ea54b6f89d6d3724346
--- /dev/null
+++ b/Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/checks/ContextTrackingState.java
@@ -0,0 +1,66 @@
+package org.chromium.devtools.jsdoc.checks;
+
+import com.google.javascript.rhino.head.ast.AstNode;
+
+import org.chromium.devtools.jsdoc.ValidatorContext;
+import org.chromium.devtools.jsdoc.checks.TypeRecord.InheritanceEntry;
+
+import java.util.ArrayDeque;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ContextTrackingState {
+    private final ValidatorContext context;
+
+    ContextTrackingState(ValidatorContext context) {
+        this.context = context;
+    }
+
+    private final TypeRecord NULL_TYPE_RECORD = new TypeRecord(
+            null,
+            false,
+            Collections.<InheritanceEntry>emptyList(),
+            Collections.<InheritanceEntry>emptyList());
+    private final FunctionRecord NULL_FUNCTION_RECORD =
+            new FunctionRecord(null, false, null, null, null);
+
+    final Map<String, TypeRecord> typeRecordsByTypeName = new HashMap<>();
+    final Deque<TypeRecord> typeRecords = new ArrayDeque<>();
+    final Deque<FunctionRecord> functionRecords = new ArrayDeque<>();
+
+    TypeRecord getCurrentTypeRecord() {
+        TypeRecord result = typeRecords.isEmpty()
+                ? NULL_TYPE_RECORD
+                : typeRecords.peekLast();
+        return result == NULL_TYPE_RECORD ? null : result;
+    }
+
+    FunctionRecord getCurrentFunctionRecord() {
+        FunctionRecord result = functionRecords.isEmpty()
+                ? NULL_FUNCTION_RECORD
+                : functionRecords.peekLast();
+        return result == NULL_FUNCTION_RECORD ? null : result;
+    }
+
+    ValidatorContext getContext() {
+        return context;
+    }
+
+    Map<String, TypeRecord> getTypeRecordsByTypeName() {
+        return typeRecordsByTypeName;
+    }
+
+    String getNodeText(AstNode node) {
+        return getContext().getNodeText(node);
+    }
+
+    void addTypeRecord(TypeRecord record) {
+        typeRecords.addLast(record == null ? NULL_TYPE_RECORD : record);
+    }
+
+    void addFunctionRecord(FunctionRecord record) {
+        functionRecords.addLast(record == null ? NULL_FUNCTION_RECORD : record);
+    }
+}