hboutemy commented on code in PR #37:
URL: https://github.com/apache/maven-help-plugin/pull/37#discussion_r1546854847


##########
src/main/java/org/apache/maven/plugins/help/ImportedFromLocationFormatter.java:
##########
@@ -0,0 +1,125 @@
+/*
+ * 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.plugins.help;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.maven.model.Dependency;
+import org.apache.maven.model.InputLocation;
+import org.apache.maven.model.InputSource;
+import org.apache.maven.project.MavenProject;
+import org.codehaus.plexus.util.StringUtils;
+
+/**
+ * Implementation of {@link InputLocation.StringFormatter}. Enhances the 
default implementation with support for
+ * following "references" (caused by e.g. dependency management imports).
+ */
+public class ImportedFromLocationFormatter extends 
InputLocation.StringFormatter {
+    private final Method getImportedFromMethod;
+    private final MavenProject project;
+
+    public ImportedFromLocationFormatter(final Method getImportedFromMethod, 
final MavenProject project) {
+        this.getImportedFromMethod = getImportedFromMethod;
+        this.project = project;
+    }
+
+    @Override
+    public String toString(InputLocation location) {
+        InputSource source = location.getSource();
+
+        String s = source.getModelId(); // by default, display modelId
+
+        if (StringUtils.isBlank(s) || s.contains("[unknown-version]")) {
+            // unless it is blank or does not provide version information
+            s = source.toString();
+        }
+
+        InputLocation importedFrom = getImportedFrom(location);
+
+        StringBuilder p = new StringBuilder();
+
+        while (importedFrom != null
+                && 
!source.toString().equals(importedFrom.getSource().toString())) {
+            p.append(" from ").append(importedFrom.getSource().getModelId());

Review Comment:
   we also need the line, to know where the import has been done: there may be 
multiple ones in a source



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