1 files changed, 122 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-0.91/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/XAttr.java b/sca-java-1.x/branches/sca-java-0.91/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/XAttr.java
new file mode 100644
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+++ b/sca-java-1.x/branches/sca-java-0.91/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/XAttr.java
@@ -0,0 +1,122 @@
+/*
+ * 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.tuscany.sca.assembly.xml;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamWriter;
+
+
+/**
+ * Represents an XML attribute that needs to be written to a document.
+ *
+ * @version $Rev$ $Date$
+ */
+class XAttr {
+
+    String uri = Constants.SCA10_NS;
+    String name;
+    Object value;
+
+    public XAttr(String uri, String name, String value) {
+        this.uri = uri;
+        this.name = name;
+        this.value = value;
+    }
+
+    public XAttr(String name, String value) {
+        this.name = name;
+        this.value = value;
+    }
+
+    public XAttr(String uri, String name, boolean value) {
+        this.uri = uri;
+        this.name = name;
+        this.value = value;
+    }
+
+    public XAttr(String name, boolean value) {
+        this.name = name;
+        this.value = value;
+    }
+
+    public XAttr(String uri, String name, QName value) {
+        this.uri = uri;
+        this.name = name;
+        this.value = value;
+    }
+
+    public XAttr(String name, QName value) {
+        this.name = name;
+        this.value = value;
+    }
+
+    /**
+     * Writes a string from a qname and registers a prefix for its namespace.  
+     * @param reader
+     * @param value
+     * @return
+     */
+    protected String writeQNameValue(XMLStreamWriter writer, QName qname) throws XMLStreamException {
+        if (qname != null) {
+            String prefix = qname.getPrefix();
+            String uri = qname.getNamespaceURI();
+            prefix = writer.getPrefix(uri);
+            if (prefix != null) {
+
+                // Use the prefix already bound to the given uri
+                return prefix + ":" + qname.getLocalPart();
+            } else {
+                
+                // Find an available prefix and bind it to the given uri 
+                NamespaceContext nsc = writer.getNamespaceContext();
+                for (int i=1; ; i++) {
+                    prefix = "ns" + i;
+                    if (nsc.getNamespaceURI(prefix) == null) {
+                        break;
+                    }
+                }
+                writer.setPrefix(prefix, uri);
+                writer.writeNamespace(prefix, uri);
+                return prefix + ":" + qname.getLocalPart();
+            }
+        } else {
+            return null;
+        }
+    }
+
+    void write(XMLStreamWriter writer) throws XMLStreamException {
+        if (value != null) {
+            String str;
+            if (value instanceof QName) {
+                str = writeQNameValue(writer, (QName)value);
+            } else {
+                str = String.valueOf(value);
+            }
+            if (uri != null && !uri.equals(Constants.SCA10_NS)) {
+                writer.writeAttribute(uri, name, str);
+            } else {
+                writer.writeAttribute(name,str);
+            }
+        }
+    }
+
+}