Initial revision

From-SVN: r102074

libjava/classpath/javax/xml/namespace/QName.java

@@ -0,0 +1,171 @@
+/*
+ * QName.java
+ * Copyright (C) 2004 The Free Software Foundation
+ * 
+ * This file is part of GNU JAXP, a library.
+ *
+ * GNU JAXP is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * GNU JAXP is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Linking this library statically or dynamically with other modules is
+ * making a combined work based on this library.  Thus, the terms and
+ * conditions of the GNU General Public License cover the whole
+ * combination.
+ *
+ * As a special exception, the copyright holders of this library give you
+ * permission to link this library with independent modules to produce an
+ * executable, regardless of the license terms of these independent
+ * modules, and to copy and distribute the resulting executable under
+ * terms of your choice, provided that you also meet, for each linked
+ * independent module, the terms and conditions of the license of that
+ * module.  An independent module is a module which is not derived from
+ * or based on this library.  If you modify this library, you may extend
+ * this exception to your version of the library, but you are not
+ * obliged to do so.  If you do not wish to do so, delete this
+ * exception statement from your version. 
+ */
+
+package javax.xml.namespace;
+
+import javax.xml.XMLConstants;
+
+/**
+ * An XML
+ * <a href='http://www.w3.org/TR/REC-xml-names/#ns-qualnames'>qualified name</a>.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ * @since 1.3
+ */
+public class QName
+{
+
+  private final String namespaceURI;
+  private final String localPart;
+  private final String prefix;
+  private final String qName;
+  int hashCode = -1;
+
+  public QName(String namespaceURI, String localPart)
+  {
+    this(namespaceURI, localPart, null);
+  }
+
+  public QName(String namespaceURI, String localPart, String prefix)
+  {
+    if (namespaceURI == null)
+      {
+        namespaceURI = XMLConstants.NULL_NS_URI;
+      }
+    if (localPart == null)
+      {
+        throw new IllegalArgumentException();
+      }
+    if (prefix == null)
+      {
+        prefix = XMLConstants.DEFAULT_NS_PREFIX;
+      }
+    this.namespaceURI = namespaceURI;
+    this.localPart = localPart;
+    this.prefix = prefix;
+    
+    StringBuffer buf = new StringBuffer();
+    if (namespaceURI != null && namespaceURI.length() > 0)
+      {
+        buf.append('{');
+        buf.append(namespaceURI);
+        buf.append('}');
+      }
+    if (prefix != null && prefix.length() > 0)
+      {
+        buf.append(prefix);
+        buf.append(':');
+      }
+    buf.append(localPart);
+    qName = buf.toString();
+  }
+
+  public QName(String localPart)
+  {
+    this(null, localPart, null);
+  }
+
+  public String getNamespaceURI()
+  {
+    return namespaceURI;
+  }
+
+  public String getLocalPart()
+  {
+    return localPart;
+  }
+
+  public String getPrefix()
+  {
+    return prefix;
+  }
+
+  public boolean equals(Object obj)
+  {
+    if (obj instanceof QName)
+      {
+        QName qname = (QName) obj;
+        return qname.getLocalPart().equals(localPart) &&
+          qname.getNamespaceURI().equals(namespaceURI);
+      }
+    return false;
+  }
+
+  public final int hashCode()
+  {
+    if (hashCode == -1)
+      {
+        StringBuffer buf = new StringBuffer();
+        buf.append('{');
+        buf.append(namespaceURI);
+        buf.append('}');
+        buf.append(localPart);
+        hashCode = buf.toString().hashCode();
+      }
+    return hashCode;
+  }
+
+  public String toString()
+  {
+    return qName;
+  }
+
+  public static QName valueOf(String qNameAsString)
+  {
+    String namespaceUri = "", prefix = null;
+    int start = qNameAsString.indexOf('{');
+    int end = qNameAsString.indexOf('}');
+    if (start != -1)
+      {
+        if (end < start)
+          {
+            throw new IllegalArgumentException(qNameAsString);
+          }
+        namespaceUri = qNameAsString.substring(start + 1, end);
+        qNameAsString = qNameAsString.substring(end + 1);
+      }
+    start = qNameAsString.indexOf(':');
+    if (start != -1)
+      {
+        prefix = qNameAsString.substring(0, start);
+        qNameAsString = qNameAsString.substring(start + 1);
+      }
+    return new QName(namespaceUri, qNameAsString, prefix);
+  }
+  
+}