Issue #23. Added QNameUtils.

Author: highsource

runtime/src/main/java/org/jvnet/jaxb2_commons/xml/namespace/util/QNameUtils.java

@@ -0,0 +1,29 @@
+package org.jvnet.jaxb2_commons.xml.namespace.util;
+
+import javax.xml.XMLConstants;
+import javax.xml.namespace.QName;
+
+import org.jvnet.jaxb2_commons.lang.Validate;
+
+public class QNameUtils {
+
+	private QNameUtils() {
+	}
+
+	public static String getKey(QName name) {
+		Validate.notNull(name);
+		final StringBuilder sb = new StringBuilder();
+		final String namespaceURI = name.getNamespaceURI();
+		if (!namespaceURI.equals(XMLConstants.NULL_NS_URI)) {
+			sb.append("{").append(namespaceURI).append("}");
+		}
+		final String prefix = name.getPrefix();
+		if (!XMLConstants.DEFAULT_NS_PREFIX.equals(prefix)) {
+			sb.append(prefix).append(":");
+		}
+		final String localPart = name.getLocalPart();
+		sb.append(localPart);
+		return sb.toString();
+
+	}
+}

runtime/src/test/java/org/jvnet/jaxb2_commons/xml/namespace/util/tests/QNameUtilsTest.java

@@ -0,0 +1,19 @@
+package org.jvnet.jaxb2_commons.xml.namespace.util.tests;
+
+import javax.xml.namespace.QName;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.jvnet.jaxb2_commons.xml.namespace.util.QNameUtils;
+
+public class QNameUtilsTest {
+
+	@Test
+	public void producesCorrectKey()
+	{
+		Assert.assertEquals("a", QNameUtils.getKey(new QName("a")));
+		Assert.assertEquals("{b}a", QNameUtils.getKey(new QName("b", "a")));
+		Assert.assertEquals("{b}c:a", QNameUtils.getKey(new QName("b", "a", "c")));
+		Assert.assertEquals("c:a", QNameUtils.getKey(new QName("", "a", "c")));
+	}
+}