Allow use of map for qualifiers in constructor

src/main/java/com/github/packageurl/PackageURL.java

@@ -105,7 +105,25 @@ public PackageURL(final String type, final String namespace, final String name,
     }
 
     /**
-     * The PackageURL scheme constant.
+     * Constructs a new PackageURL object.
+     *
+     * @param type the type of package (i.e. maven, npm, gem, etc)
+     * @param namespace the name prefix (i.e. group, owner, organization)
+     * @param name the name of the package
+     * @param version the version of the package
+     * @param qualifiers an array of key/value pair qualifiers
+     * @param subpath the subpath string
+     * @throws MalformedPackageURLException if parsing fails
+     * @since 1.6.0
+     */
+    public PackageURL(final String type, final String namespace, final String name, final String version,
+                      final Map<String, String> qualifiers, final String subpath)
+            throws MalformedPackageURLException {
+        this(type, namespace, name, version, (qualifiers != null) ? new TreeMap<>(qualifiers) : null, subpath);
+    }
+
+    /**
+     * The PackageURL scheme constant
      */
     public static final String SCHEME = "pkg";
 

src/test/java/com/github/packageurl/PackageURLTest.java

@@ -23,6 +23,8 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Locale;
 import java.util.TreeMap;
 
@@ -138,14 +140,18 @@ public void testConstructorParameters() throws MalformedPackageURLException {
             final String subpath = testDefinition.optString("subpath", null);
 
             TreeMap<String, String> map = null;
+            Map<String, String> hashMap = null;
             if (qualifiers != null) {
                 map = qualifiers.toMap().entrySet().stream().collect(
                         TreeMap<String, String>::new,
                         (qmap, entry) -> qmap.put(entry.getKey(), (String) entry.getValue()),
                         TreeMap<String, String>::putAll
                 );
+                hashMap = new HashMap<>(map);
             }
 
+
+
             if (invalid) {
                 try {
                     PackageURL purl = new PackageURL(type, namespace, name, version, map, subpath);
@@ -173,6 +179,8 @@ public void testConstructorParameters() throws MalformedPackageURLException {
                     Assert.assertTrue(purl.getQualifiers().containsKey(key));
                     Assert.assertEquals(value, purl.getQualifiers().get(key));
                 });
+                PackageURL purl2 = new PackageURL(type, namespace, name, version, hashMap, subpath);
+                Assert.assertEquals(purl.getQualifiers(), purl2.getQualifiers());
             }
         }
     }