1 files changed, 195 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6.1-TUSCANY-3909/extension-helper/src/main/java/org/apache/tuscany/sca/extension/helper/impl/BindingSCDLProcessor.java b/sca-java-1.x/tags/1.6.1-TUSCANY-3909/extension-helper/src/main/java/org/apache/tuscany/sca/extension/helper/impl/BindingSCDLProcessor.java
new file mode 100644
index 0000000000..8b99701baa
--- /dev/null
+++ b/sca-java-1.x/tags/1.6.1-TUSCANY-3909/extension-helper/src/main/java/org/apache/tuscany/sca/extension/helper/impl/BindingSCDLProcessor.java
@@ -0,0 +1,195 @@
+/*
+ * 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.extension.helper.impl;
+
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionReadException;
+import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
+import org.apache.tuscany.sca.extension.helper.utils.AbstractBinding;
+
+/**
+ * An SCDL ArtifactProcessor which uses the Binding class getters/setters
+ * to define the SCDL attributes.
+ *
+ * TODO: merge this with SCDLProcessor
+ *
+ * @version $Rev$ $Date$
+ */
+public class BindingSCDLProcessor implements StAXArtifactProcessor {
+
+    protected QName scdlQName;
+    protected Class<Binding> bindingClass;
+
+    protected Map<String, Method> attributeSetters;
+    protected Method elementTextSetter;
+
+    public BindingSCDLProcessor(QName scdlQName, Class<Binding> implementationClass) {
+        this.scdlQName = scdlQName;
+        this.bindingClass = implementationClass;
+        initAttributes();
+    }
+
+    protected void initAttributes() {
+        attributeSetters = new HashMap<String, Method>();
+        Set<Method> methods = new HashSet<Method>(Arrays.asList(bindingClass.getMethods()));
+        methods.removeAll(Arrays.asList(AbstractBinding.class.getMethods()));
+        for (Method m : methods) {
+            if ("setElementText".equals(m.getName())) {
+                elementTextSetter = m;
+            } else if ((m.getName().startsWith("set"))) {
+                attributeSetters.put(getFieldName(m), m);
+            }
+        }
+    }
+
+    /**
+     * Remove get/set from method name, set 1st char to lowercase and
+     * remove any trailing underscore character
+     */
+    protected String getFieldName(Method m) {
+        StringBuilder sb = new StringBuilder(m.getName().substring(3));
+        sb.setCharAt(0, Character.toLowerCase(sb.charAt(0)));
+        String name = sb.toString();
+        if (name.endsWith("_")) {
+            name = name.substring(0,name.length()-1);
+        }
+        return name;
+    }
+
+    public QName getArtifactType() {
+        return scdlQName;
+    }
+
+    public Class getModelType() {
+        //FIXME Having two different bindings, PojoBinding wrapping
+        // the real binding is pretty confusing, looks like if you don't return
+        // PojoBinding here, the write and resolve methods will never be
+        // called, returning PojoBinding.class seems to fix that issue without
+        // breaking anything else
+        return PojoBinding.class;
+    }
+
+    public Binding read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
+        Object impl;
+        try {
+            impl = bindingClass.newInstance();
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+
+        for (String attribute : attributeSetters.keySet()) {
+            String value = reader.getAttributeValue(null, attribute);
+            if (value != null && value.length() > 0) {
+                try {
+                    attributeSetters.get(attribute).invoke(impl, new Object[] {value});
+                } catch (Exception e) {
+                    throw new RuntimeException(e);
+                }
+            }
+        }
+
+        //FIXME: none of the attributes of Binding seem to be working with PojoBinding
+        // For now at least read the binding URI
+        String uri = reader.getAttributeValue(null, "uri");
+
+        if (elementTextSetter != null) {
+            try {
+                String value = reader.getElementText();
+                if (value != null && value.length() > 0) {
+                    elementTextSetter.invoke(impl, value);
+                }
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        while (!(reader.getEventType() == END_ELEMENT && scdlQName.equals(reader.getName())) && reader.hasNext()) {
+            reader.next();
+        }
+
+        if (!(impl instanceof Binding)) {
+            impl = new PojoBinding(impl);
+
+            //FIXME: none of the attributes of Binding seem to be working with PojoBinding
+            // For now at least read the binding URI
+            if (uri != null) {
+                ((PojoBinding)impl).setURI(uri);
+            }
+        }
+        return (Binding)impl;
+    }
+
+    public void resolve(Object model, ModelResolver resolver) throws ContributionResolveException {
+    }
+
+    public void write(Object model, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
+
+        //FIXME: none of the attributes of Binding seem to be working with PojoBinding
+        // For now at least write the binding URI
+
+        // Find a namespace prefix and write the element
+        String prefix = writer.getPrefix(scdlQName.getNamespaceURI());
+        if (prefix == null) {
+            NamespaceContext nsc = writer.getNamespaceContext();
+            for (int i=1; ; i++) {
+                prefix = "ns" + i;
+                if (nsc.getNamespaceURI(prefix) == null) {
+                    break;
+                }
+            }
+            // writer.setPrefix(prefix, scdlQName.getNamespaceURI());
+        }
+        writer.writeStartElement(scdlQName.getNamespaceURI(), scdlQName.getLocalPart());
+        writer.writeNamespace(prefix, scdlQName.getNamespaceURI());
+
+        // Write the binding URI attribute
+        String uri;
+        try {
+            uri = (String)model.getClass().getMethod("getURI").invoke(model);
+        } catch (Exception e) {
+            uri = null;
+        }
+        if (uri != null) {
+            writer.writeAttribute("uri", uri);
+        }
+
+        writer.writeEndElement();
+
+    }
+
+}