1 files changed, 170 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/loader/PropertyLoader.java b/sca-java-1.x/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/loader/PropertyLoader.java
new file mode 100644
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--- /dev/null
+++ b/sca-java-1.x/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/loader/PropertyLoader.java
@@ -0,0 +1,170 @@
+/*
+ * 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.core.loader;
+
+import static org.osoa.sca.Constants.SCA_NS;
+
+import java.util.List;
+
+import javax.xml.namespace.QName;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+import org.apache.tuscany.spi.annotation.Autowire;
+import org.apache.tuscany.spi.component.CompositeComponent;
+import org.apache.tuscany.spi.deployer.DeploymentContext;
+import org.apache.tuscany.spi.extension.LoaderExtension;
+import org.apache.tuscany.spi.loader.LoaderRegistry;
+import org.apache.tuscany.spi.model.ModelObject;
+import org.apache.tuscany.spi.model.Property;
+import org.apache.tuscany.spi.util.stax.StaxUtil;
+import org.osoa.sca.annotations.Constructor;
+import org.w3c.dom.Element;
+
+/**
+ * Loads a property from an XML-based assembly file
+ * 
+ * @version $Rev$ $Date$
+ */
+public class PropertyLoader extends LoaderExtension<Property> {
+    public static final String PROPERTY_NAME_ATTR = "name";
+    public static final String PROPERTY_TYPE_ATTR = "type";
+    public static final String PROPERTY_ELEMENT_ATTR = "element";
+    public static final String PROPERTY_MANY_ATTR = "many";
+    public static final String PROPERTY_NO_DEFAULT_ATTR = "mustSupply";
+    public static final String DEFAULT_PREFIX = "xs";
+    public static final String DEFAULT_SCHEMA_NS = "http://www.w3.org/2001/XMLSchema";
+    public static final char COLON = ':';
+
+    public static final QName PROPERTY = new QName(SCA_NS, "property");
+    private final DocumentBuilder documentBuilder;
+
+    @Constructor( {"registry"})
+    public PropertyLoader(@Autowire
+    LoaderRegistry registry) {
+        super(registry);
+        try {
+            documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
+        } catch (ParserConfigurationException e) {
+            // we should be able to construct the default DocumentBuilder
+            throw new AssertionError(e);
+        }
+    }
+
+    public QName getXMLType() {
+        return PROPERTY;
+    }
+
+    public Property<?> load(CompositeComponent parent,
+                            ModelObject object,
+                            XMLStreamReader reader,
+                            DeploymentContext ctx) throws XMLStreamException,
+                                                  PropertyLoaderException {
+        assert PROPERTY.equals(reader.getName());
+        String name = reader.getAttributeValue(null, PROPERTY_NAME_ATTR);
+        String typeName = reader.getAttributeValue(null, PROPERTY_TYPE_ATTR);
+        String elementName = reader.getAttributeValue(null, PROPERTY_ELEMENT_ATTR);
+        QName xmlElement = null;
+        QName xmlType = null;
+        
+        if (typeName != null) {
+            int index = typeName.indexOf(COLON);
+            if (index != -1) {
+                String prefix = typeName.substring(0, index);
+                if (prefix == null || prefix.length() == 0) {
+                    prefix = DEFAULT_PREFIX;
+                }
+                
+                String localName = typeName.substring(index + 1);
+                String ns = reader.getNamespaceURI(prefix);
+                if (ns == null || ns.length() == 0) {
+                    ns = DEFAULT_SCHEMA_NS;
+                }
+                xmlType = new QName(ns, localName, prefix);
+            }
+        } else if (elementName != null) {
+            int index = elementName.indexOf(COLON);
+            if (index != -1) {
+                String prefix = elementName.substring(0, index);
+                String localName = elementName.substring(index + 1);
+                String ns = reader.getNamespaceURI(prefix);
+                xmlElement = new QName(ns, localName, prefix);
+                // FIXME :
+                // need to figure out how to determine the xmltype from this
+                // xmlelement
+                // this need access to the global xml element thro
+                // schemalocation or thro
+                // artifact repository
+                xmlType = null;
+            }
+        }
+        
+        if (xmlType == null && xmlElement == null) {
+            MissingTypePropertyLoaderException ex = new MissingTypePropertyLoaderException();
+            ex.setPropertyName(name);
+            ex.setLine(reader.getLocation().getLineNumber());
+            ex.setColumn(reader.getLocation().getColumnNumber());
+            throw ex; 
+        }
+
+        boolean many = false;
+        boolean mustSupply = false;
+        String attrValue = null;
+        attrValue = reader.getAttributeValue(null, PROPERTY_MANY_ATTR);
+        if (attrValue != null) {
+            many = Boolean.parseBoolean(attrValue);
+        }
+
+        attrValue = reader.getAttributeValue(null, PROPERTY_NO_DEFAULT_ATTR);
+        if (attrValue != null) {
+            mustSupply = Boolean.parseBoolean(attrValue);
+        }
+
+        List<Element> defaultValues =
+            StaxUtil.createPropertyValues(reader, xmlType, xmlElement, many, documentBuilder);
+
+        if (mustSupply && defaultValues.size() > 0) {
+            DefaultPropertyValueLoaderException ex = new DefaultPropertyValueLoaderException();
+            ex.setPropertyName(name);
+            ex.setLine(reader.getLocation().getLineNumber());
+            ex.setColumn(reader.getLocation().getColumnNumber());
+            throw ex;
+        }
+
+        if (!many && defaultValues.size() > 1) {
+            ManyPropertyValueLoaderException ex = new ManyPropertyValueLoaderException();
+            ex.setPropertyName(name);
+            ex.setLine(reader.getLocation().getLineNumber());
+            ex.setColumn(reader.getLocation().getColumnNumber());
+            throw ex;
+        }
+
+        Property<?> property = new Property();
+        property.setName(name);
+        property.setXmlType(xmlType);
+        property.setXmlElement(xmlElement);
+        property.setMany(many);
+        property.setMustSupply(mustSupply);
+        property.setDefaultValues(defaultValues);
+        return property;
+    }
+}