michael-o commented on code in PR #194:
URL: https://github.com/apache/maven-doxia/pull/194#discussion_r1460323417


##########
doxia-sink-api/src/main/java/org/apache/maven/doxia/sink/Locator.java:
##########
@@ -0,0 +1,48 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.maven.doxia.sink;
+
+/**
+ * Interface for associating a {@link Sink} event with a document location.
+ * @since 2.0.0
+ */
+public interface Locator {
+
+    /**
+     * Returns the line number for the sink event (starting from 1).
+     * If it is not known returns {@code -1}.
+     *
+     * @return the line number for the sink event
+     */
+    int getLineNumber();
+
+    /**
+     * Returns the column number for the sink event (starting from 1).
+     * If it is not known returns {@code -1}.
+     *
+     * @return the column number for the sink event
+     */
+    int getColumnNumber();
+
+    /**
+     * Returns the underlying source reference (for file based documents a 
relative file path, otherwise an arbitrary string or {@code null}).
+     * @return the source for the sink event (may be {@code null})
+     */
+    String getReference();

Review Comment:
   From logical PoV, shouldn't reference be listed first?



##########
doxia-core/src/main/java/org/apache/maven/doxia/sink/impl/AbstractLocator.java:
##########
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.maven.doxia.sink.impl;
+
+import org.apache.maven.doxia.sink.Locator;
+
+/**
+ * @since 2.0.0
+ */
+public abstract class AbstractLocator implements Locator {
+
+    private String reference;
+
+    protected AbstractLocator(String reference) {
+        super();

Review Comment:
   Why is super required if we have only an interface above?



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