Moving 2.x trunk

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@882795 13f79535-47bb-0310-9956-ffa450edef68

7 files changed, 898 insertions, 0 deletions

diff --git a/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/DefaultXSDFactory.java b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/DefaultXSDFactory.java
new file mode 100644
index 0000000000..92dce98fa1
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/DefaultXSDFactory.java
@@ -0,0 +1,30 @@
+/*
+ * 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.xsd;
+
+import org.apache.tuscany.sca.xsd.impl.XSDFactoryImpl;
+
+/**
+ * A factory for XSD definitions
+ * 
+ * @version $Rev$ $Date$
+ */
+public class DefaultXSDFactory extends XSDFactoryImpl implements XSDFactory {
+
+}
diff --git a/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/XSDFactory.java b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/XSDFactory.java
new file mode 100644
index 0000000000..08a1c8dd63
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/XSDFactory.java
@@ -0,0 +1,35 @@
+/*
+ * 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.xsd;
+
+/**
+ * Factory for XSD definitions
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface XSDFactory {
+    
+    /**
+     * Creates a new XML Schema definition.
+     * 
+     * @return a new XML Schema definition
+     */
+    XSDefinition createXSDefinition();
+
+}
diff --git a/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/XSDefinition.java b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/XSDefinition.java
new file mode 100644
index 0000000000..f9bf627655
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/XSDefinition.java
@@ -0,0 +1,117 @@
+/*
+ * 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.xsd;
+
+import java.net.URI;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Base;
+import org.apache.ws.commons.schema.XmlSchema;
+import org.apache.ws.commons.schema.XmlSchemaCollection;
+import org.apache.ws.commons.schema.XmlSchemaElement;
+import org.apache.ws.commons.schema.XmlSchemaType;
+import org.w3c.dom.Document;
+
+/**
+ * Represents an XML Schema definition.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface XSDefinition extends Base {
+    XmlSchemaCollection getSchemaCollection();
+
+    void setSchemaCollection(XmlSchemaCollection schemaCollection);
+
+    /**
+     * Returns the XmlSchema definition model
+     * @return the XmlSchema definition model
+     */
+    XmlSchema getSchema();
+
+    /**
+     * Sets the XmlSchema definition model
+     * @param definition the XmlSchema definition model
+     */
+    void setSchema(XmlSchema definition);
+
+    /**
+     * Returns the namespace of this XmlSchema definition.
+     * @return the namespace of this XmlSchema definition
+     */
+    String getNamespace();
+
+    /**
+     * Sets the namespace of this XmlSchema definition.
+     * @param namespace the namespace of this XmlSchema definition
+     */
+    void setNamespace(String namespace);
+
+    /**
+     * Get the location of the XSD
+     * @return
+     */
+    URI getLocation();
+
+    /**
+     * Set the location of the XSD
+     * @param uri
+     */
+    void setLocation(URI uri);
+
+    /**
+     * Get the DOM representation of the XSD
+     * @return
+     */
+    Document getDocument();
+
+    /**
+     * Set the DOM representation of the XSD
+     * @param document
+     */
+    void setDocument(Document document);
+
+    /**
+     * Get an XSD element by QName
+     * @param name The element name
+     * @return The XSD element
+     */
+    XmlSchemaElement getXmlSchemaElement(QName name);
+
+    /**
+     * Get an XSD type by QName
+     * @param name The type name
+     * @return The XSD type
+     */
+    XmlSchemaType getXmlSchemaType(QName name);
+
+    /**
+     * Get the aggregated definitions for a facade XSDefinition
+     * @return The aggregated definitions, or null if not a facade
+     */
+    List<XSDefinition> getAggregatedDefinitions();
+
+    /**
+     * Set the aggregated definitions for a facade XSDefinition
+     * @param name The aggregated definitions
+     */
+    void setAggregatedDefinitions(List<XSDefinition> definitions);
+}
diff --git a/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/impl/XSDFactoryImpl.java b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/impl/XSDFactoryImpl.java
new file mode 100644
index 0000000000..60ff6b6fd9
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/impl/XSDFactoryImpl.java
@@ -0,0 +1,35 @@
+/*
+ * 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.xsd.impl;
+
+import org.apache.tuscany.sca.xsd.XSDefinition;
+import org.apache.tuscany.sca.xsd.XSDFactory;
+
+/**
+ * A factory for XSD definitions
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class XSDFactoryImpl implements XSDFactory {
+    
+    public XSDefinition createXSDefinition() {
+        return new XSDefinitionImpl();
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/impl/XSDefinitionImpl.java b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/impl/XSDefinitionImpl.java
new file mode 100644
index 0000000000..af8cbf12ab
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/impl/XSDefinitionImpl.java
@@ -0,0 +1,232 @@
+/*
+ * 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.xsd.impl;
+
+import java.net.URI;
+import java.util.Iterator;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.xsd.XSDefinition;
+import org.apache.ws.commons.schema.XmlSchema;
+import org.apache.ws.commons.schema.XmlSchemaCollection;
+import org.apache.ws.commons.schema.XmlSchemaElement;
+import org.apache.ws.commons.schema.XmlSchemaImport;
+import org.apache.ws.commons.schema.XmlSchemaInclude;
+import org.apache.ws.commons.schema.XmlSchemaObject;
+import org.apache.ws.commons.schema.XmlSchemaType;
+import org.w3c.dom.Document;
+
+/**
+ * Represents a XML schema definition.
+ *
+ * @version $Rev$ $Date$
+ */
+public class XSDefinitionImpl implements XSDefinition {
+    private XmlSchemaCollection schemaCollection = new XmlSchemaCollection();
+    private XmlSchema schema;
+    private String namespace;
+    private URI location;
+    private Document document;
+    private boolean unresolved;
+    private List<XSDefinition> definitions;
+
+    public XSDefinitionImpl() {
+    }
+
+    public XmlSchema getSchema() {
+        return schema;
+    }
+
+    public void setSchema(XmlSchema definition) {
+        this.schema = definition;
+    }
+
+    public boolean isUnresolved() {
+        return unresolved;
+    }
+
+    public void setUnresolved(boolean undefined) {
+        this.unresolved = undefined;
+    }
+
+    public String getNamespace() {
+        if (isUnresolved()) {
+            return namespace;
+        } else if (schema != null) {
+            return schema.getTargetNamespace();
+        } else {
+            return namespace;
+        }
+    }
+
+    public void setNamespace(String namespace) {
+        if (!isUnresolved()) {
+            throw new IllegalStateException();
+        } else {
+            this.namespace = namespace;
+        }
+    }
+
+    /**
+     * @return the location
+     */
+    public URI getLocation() {
+        return location;
+    }
+
+    /**
+     * @param location the location to set
+     */
+    public void setLocation(URI location) {
+        this.location = location;
+    }
+
+    /**
+     * @return the document
+     */
+    public Document getDocument() {
+        return document;
+    }
+
+    /**
+     * @param document the document to set
+     */
+    public void setDocument(Document document) {
+        this.document = document;
+    }
+
+    /**
+     * @return the schemaCollection
+     */
+    public XmlSchemaCollection getSchemaCollection() {
+        return schemaCollection;
+    }
+
+    /**
+     * @param schemaCollection the schemaCollection to set
+     */
+    public void setSchemaCollection(XmlSchemaCollection schemaCollection) {
+        this.schemaCollection = schemaCollection;
+    }
+
+    /**
+     * @see java.lang.Object#hashCode()
+     */
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((location == null) ? 0 : location.hashCode());
+        result = prime * result + ((namespace == null) ? 0 : namespace.hashCode());
+        return result;
+    }
+
+    /**
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (!(obj instanceof XSDefinitionImpl))
+            return false;
+        final XSDefinitionImpl other = (XSDefinitionImpl)obj;
+        if (location == null) {
+            if (other.location != null)
+                return false;
+        } else if (!location.equals(other.location))
+            return false;
+        if (namespace == null) {
+            if (other.namespace != null)
+                return false;
+        } else if (!namespace.equals(other.namespace))
+            return false;
+        return true;
+    }
+
+    private static <T extends XmlSchemaObject> T getXmlSchemaObject(XmlSchema schema, QName name, Class<T> type) {
+        if (schema != null) {
+            XmlSchemaObject object = null;
+            if (type == XmlSchemaElement.class) {
+                object = schema.getElementByName(name);
+            } else if (type == XmlSchemaType.class) {
+                object = schema.getTypeByName(name);
+            }
+            if (object != null) {
+                return type.cast(object);
+            }
+            for (Iterator<?> i = schema.getIncludes().getIterator(); i.hasNext();) {
+                XmlSchemaObject obj = (XmlSchemaObject)i.next();
+                XmlSchema ext = null;
+                if (obj instanceof XmlSchemaInclude) {
+                    ext = ((XmlSchemaInclude)obj).getSchema();
+                }
+                if (obj instanceof XmlSchemaImport) {
+                    ext = ((XmlSchemaImport)obj).getSchema();
+                }
+                object = getXmlSchemaObject(ext, name, type);
+                if (object != null) {
+                    return type.cast(object);
+                }
+            }
+        }
+        return null;
+    }
+
+    public XmlSchemaElement getXmlSchemaElement(QName name) {
+        if (schema != null) {
+            XmlSchemaElement element = getXmlSchemaObject(schema, name, XmlSchemaElement.class);
+            if (element != null) {
+                return element;
+            }
+        }
+
+        if (schemaCollection != null) {
+            return schemaCollection.getElementByQName(name);
+        }
+        return null;
+    }
+
+    public XmlSchemaType getXmlSchemaType(QName name) {
+        if (schema != null) {
+            XmlSchemaType type = getXmlSchemaObject(schema, name, XmlSchemaType.class);
+            if (type != null) {
+                return type;
+            }
+        }
+        if (schemaCollection != null) {
+            return schemaCollection.getTypeByQName(name);
+        }
+        return null;
+    }
+ 
+    public List<XSDefinition> getAggregatedDefinitions() {
+        return definitions;
+    }
+
+    public void setAggregatedDefinitions(List<XSDefinition> definitions) {
+        this.definitions = definitions;
+    }
+
+}
diff --git a/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/xml/XSDDocumentProcessor.java b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/xml/XSDDocumentProcessor.java
new file mode 100644
index 0000000000..1166567bcc
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/xml/XSDDocumentProcessor.java
@@ -0,0 +1,106 @@
+/*
+ * 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.xsd.xml;
+
+import java.net.URI;
+import java.net.URL;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLInputFactory;
+
+import org.apache.tuscany.sca.common.xml.stax.StAXHelper;
+import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+import org.apache.tuscany.sca.xsd.XSDFactory;
+import org.apache.tuscany.sca.xsd.XSDefinition;
+
+/**
+ * An ArtifactProcessor for XSD documents.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class XSDDocumentProcessor implements URLArtifactProcessor<XSDefinition> {
+    private StAXHelper helper;
+    private XSDFactory factory;
+    private XMLInputFactory inputFactory;
+    
+
+    public XSDDocumentProcessor(ExtensionPointRegistry registry, StAXArtifactProcessor processor) {
+        FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class);
+        this.factory = modelFactories.getFactory(XSDFactory.class);
+        this.inputFactory = modelFactories.getFactory(XMLInputFactory.class);
+        this.helper = StAXHelper.getInstance(registry);
+    }
+    
+    /**
+     * Report a exception.
+     * 
+     * @param problems
+     * @param message
+     * @param model
+     */
+    private void error(Monitor monitor, String message, Object model, Exception ex) {
+        if (monitor != null) {
+            Problem problem = monitor.createProblem(this.getClass().getName(), "xsd-xml-validation-messages", Severity.ERROR, model, message, ex);
+            monitor.problem(problem);
+        }        
+    }
+
+    public XSDefinition read(URL contributionURL, URI artifactURI, URL artifactURL, ProcessorContext context) throws ContributionReadException {
+        try {
+            return indexRead(artifactURL);
+        } catch (Exception e) {
+            ContributionReadException ce = new ContributionReadException(e);
+            error(context.getMonitor(), "ContributionReadException", artifactURL, ce);
+            throw ce;
+        }
+    }
+
+    public void resolve(XSDefinition model, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
+    }
+
+    public String getArtifactType() {
+        return ".xsd";
+    }
+
+    public Class<XSDefinition> getModelType() {
+        return XSDefinition.class;
+    }
+
+    public static final QName XSD = new QName("http://www.w3.org/2001/XMLSchema", "schema");
+
+    protected XSDefinition indexRead(URL doc) throws Exception {
+        XSDefinition xsd = factory.createXSDefinition();
+        xsd.setUnresolved(true);
+        xsd.setNamespace(helper.readAttribute(doc, XSD, "targetNamespace"));
+        xsd.setLocation(doc.toURI());
+        xsd.setUnresolved(false);
+        return xsd;
+    }
+}
diff --git a/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/xml/XSDModelResolver.java b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/xml/XSDModelResolver.java
new file mode 100644
index 0000000000..2ae37bc520
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/xsd/src/main/java/org/apache/tuscany/sca/xsd/xml/XSDModelResolver.java
@@ -0,0 +1,343 @@
+/*
+ * 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.xsd.xml;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.sca.common.xml.XMLDocumentHelper;
+import org.apache.tuscany.sca.contribution.Artifact;
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.DefaultImport;
+import org.apache.tuscany.sca.contribution.Import;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.processor.ContributionRuntimeException;
+import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.xsd.DefaultXSDFactory;
+import org.apache.tuscany.sca.xsd.XSDFactory;
+import org.apache.tuscany.sca.xsd.XSDefinition;
+import org.apache.tuscany.sca.xsd.impl.XSDefinitionImpl;
+import org.apache.ws.commons.schema.XmlSchema;
+import org.apache.ws.commons.schema.XmlSchemaCollection;
+import org.apache.ws.commons.schema.XmlSchemaInclude;
+import org.apache.ws.commons.schema.resolver.URIResolver;
+import org.xml.sax.InputSource;
+
+/**
+ * A Model Resolver for XSD models.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class XSDModelResolver implements ModelResolver {
+    private static final String AGGREGATED_XSD = "http://tuscany.apache.org/aggregated.xsd";
+    private XSDFactory factory;
+    private Contribution contribution;
+    private Map<String, List<XSDefinition>> map = new HashMap<String, List<XSDefinition>>();
+    private XmlSchemaCollection schemaCollection;
+
+    public XSDModelResolver(Contribution contribution, FactoryExtensionPoint modelFactories) {
+        this.contribution = contribution;
+        this.schemaCollection = new XmlSchemaCollection();
+        this.factory = new DefaultXSDFactory();
+    }
+
+    public void addModel(Object resolved, ProcessorContext context) {
+        XSDefinition definition = (XSDefinition)resolved;
+        List<XSDefinition> list = map.get(definition.getNamespace());
+        if (list == null) {
+            list = new ArrayList<XSDefinition>();
+            map.put(definition.getNamespace(), list);
+        }
+        list.add(definition);
+    }
+
+    public Object removeModel(Object resolved, ProcessorContext context) {
+        XSDefinition definition = (XSDefinition)resolved;
+        List<XSDefinition> list = map.get(definition.getNamespace());
+        if (list == null) {
+            return null;
+        } else {
+            return list.remove(definition);
+        }
+    }
+
+    public <T> T resolveModel(Class<T> modelClass, T unresolved, ProcessorContext context) {
+        schemaCollection.setSchemaResolver(new URIResolverImpl(contribution, context));
+    	XSDefinition definition = (XSDefinition)unresolved;        
+        String namespace = definition.getNamespace();
+        XSDefinition resolved = null;
+        
+        // Lookup a definition for the given namespace, within the contribution
+        List<XSDefinition> list = map.get(namespace);
+        XSDefinition modelXSD = null;
+        if (list != null && definition.getDocument() != null) {
+            // Set the document for the inline schema
+            int index = list.indexOf(definition);
+            if (index != -1) {  // a matching (not identical) document was found
+                modelXSD = list.get(index);
+                modelXSD.setDocument(definition.getDocument());
+            }
+        }
+        if (list == null && definition.getDocument() != null) {
+            // Hit for the 1st time
+            list = new ArrayList<XSDefinition>();
+            list.add(definition);
+            map.put(namespace, list);
+        }        
+        try {
+            resolved = aggregate(list);
+        } catch (IOException e) {
+            throw new ContributionRuntimeException(e);
+        }
+        if (resolved != null && !resolved.isUnresolved()) {
+            if (definition.isUnresolved() && definition.getSchema() == null && modelXSD != null) {
+                // Update the unresolved model with schema information and mark it
+                // resolved.  This information in the unresolved model is needed when
+                // this method is called by WSDLModelResolver.readInlineSchemas().
+                definition.setSchema(modelXSD.getSchema());
+                definition.setSchemaCollection(modelXSD.getSchemaCollection());
+                definition.setUnresolved(false);
+            }
+            return modelClass.cast(resolved);
+        }
+        
+        return modelClass.cast(unresolved);
+    }
+
+    private void loadOnDemand(XSDefinition definition) throws IOException {
+        if (definition.getSchema() != null) {
+            return;
+        }
+        if (definition.getDocument() != null) {
+            String uri = null;
+            if (definition.getLocation() != null) {
+                uri = definition.getLocation().toString();
+            }
+            XmlSchema schema = null;
+            try {
+                schema = schemaCollection.read(definition.getDocument(), uri, null);
+            } catch (RuntimeException e) {
+                // find original cause of the problem
+                Throwable cause = e;
+                while (cause.getCause() != null && cause != cause.getCause()) {
+                    cause = cause.getCause();
+                }
+                throw new ContributionRuntimeException(cause);
+            }
+            definition.setSchemaCollection(schemaCollection);
+            definition.setSchema(schema);
+            definition.setUnresolved(false);
+        } else if (definition.getLocation() != null) {
+            if (definition.getLocation().getFragment() != null) {
+                // It's an inline schema
+                return;
+            }
+            // Read an XSD document
+            XmlSchema schema = null;
+            for (XmlSchema d : schemaCollection.getXmlSchemas()) {
+                if (isSameNamespace(d.getTargetNamespace(), definition.getNamespace()))  {
+                    if (d.getSourceURI().equals(definition.getLocation().toString())) {
+                        schema = d;
+                        break;
+                    }
+                }
+            }
+            if (schema == null) {
+                InputSource xsd = null;
+                try {
+                    xsd = XMLDocumentHelper.getInputSource(definition.getLocation().toURL());
+                } catch (IOException e) {
+                    throw new ContributionRuntimeException(e);
+                }
+
+                try {
+                    schema = schemaCollection.read(xsd, null);
+                } catch (RuntimeException e) {
+                    // find original cause of the problem
+                    Throwable cause = e;
+                    while (cause.getCause() != null && cause != cause.getCause()) {
+                        cause = cause.getCause();
+                    }
+                    throw new ContributionRuntimeException(cause);
+                }
+            }
+            definition.setSchemaCollection(schemaCollection);
+            definition.setSchema(schema);
+        }
+    }
+
+    private boolean isSameNamespace(String ns1, String ns2) {
+        if (ns1 == null) {
+            return ns2 == null;
+        } else {
+            return ns1.equals(ns2);
+        }
+    }
+    /**
+     * Create a facade XmlSchema which includes all the definitions
+     * 
+     * @param definitions A list of the XmlSchema under the same target
+     *                namespace
+     * @return The aggregated XmlSchema
+     */
+    private XSDefinition aggregate(List<XSDefinition> definitions) throws IOException {
+        if (definitions == null || definitions.size() == 0) {
+            return null;
+        }
+        if (definitions.size() == 1) {
+            XSDefinition d = definitions.get(0);
+            loadOnDemand(d);
+            return d;
+        }
+        XSDefinition aggregated = factory.createXSDefinition();
+        for (XSDefinition d : definitions) {
+            loadOnDemand(d);
+        }
+        String ns = definitions.get(0).getNamespace();
+        
+        XmlSchema facade = null;
+        // Check if the facade XSD is already in the collection
+        for (XmlSchema s : schemaCollection.getXmlSchema(AGGREGATED_XSD)) {
+            if (ns.equals(s.getTargetNamespace())) {
+                facade = s;
+                break;
+            }
+        }
+        if (facade == null) {
+            // This will add the facade into the collection
+            facade = new XmlSchema(ns, AGGREGATED_XSD, schemaCollection);
+        }
+
+        for (XmlSchema d : schemaCollection.getXmlSchemas()) {
+            if (ns.equals(d.getTargetNamespace())) {
+                if (d == facade) {
+                    continue;
+                }
+                XmlSchemaInclude include = new XmlSchemaInclude();
+                include.setSchema(d);
+                include.setSourceURI(d.getSourceURI());
+                include.setSchemaLocation(d.getSourceURI());
+                facade.getIncludes().add(include);
+                facade.getItems().add(include);
+            }
+        }
+        aggregated.setUnresolved(true);
+        aggregated.setSchema(facade);
+        aggregated.setNamespace(ns);
+        aggregated.setAggregatedDefinitions(definitions);
+        aggregated.setUnresolved(false);
+
+        // FIXME: [rfeng] This is hacky
+        //definitions.clear();
+        //definitions.add(aggregated);
+        return aggregated;
+    }
+
+    /**
+     * URI resolver implementation for XML schema
+     */
+    public static class URIResolverImpl implements URIResolver {
+        private Contribution contribution;
+        private ProcessorContext context;
+
+        public URIResolverImpl(Contribution contribution, ProcessorContext context) {
+            this.contribution = contribution;
+            this.context = context;
+        }
+
+        public org.xml.sax.InputSource resolveEntity(java.lang.String targetNamespace,
+                                                     java.lang.String schemaLocation,
+                                                     java.lang.String baseUri) {
+            try {
+                if (schemaLocation == null) {
+                    return null;
+                }
+                URL url = null;
+                
+                // Delegate the resolution to namespace imports
+                XSDefinition resolved = null;                
+                XSDefinition unresolved = new XSDefinitionImpl();
+                unresolved.setUnresolved(true);
+                unresolved.setLocation(new URI(schemaLocation));
+                unresolved.setNamespace(targetNamespace);
+                                
+                for (Import import_ : this.contribution.getImports()) {
+                    if (import_ instanceof NamespaceImport) {
+                        NamespaceImport namespaceImport = (NamespaceImport)import_;
+                        if (namespaceImport.getNamespace().equals(targetNamespace)) {                        	
+                        	// Delegate the resolution to the namespace import resolver
+        	                resolved =
+        	                    namespaceImport.getModelResolver().resolveModel(XSDefinition.class, (XSDefinition)unresolved, context);
+        	                if (!resolved.isUnresolved()) {
+        	                	return XMLDocumentHelper.getInputSource(resolved.getLocation().toURL());
+        	                }
+                        }
+                    } else if (import_ instanceof DefaultImport) {
+                        // Delegate the resolution to the default import resolver
+                        resolved =
+                            import_.getModelResolver().resolveModel(XSDefinition.class, (XSDefinition)unresolved, context);
+                        if (!resolved.isUnresolved()) {
+                        	return XMLDocumentHelper.getInputSource(resolved.getLocation().toURL());
+                        }
+                    }
+                }
+                
+                // Not found, lookup a definition for the given namespace
+                // within the current contribution.
+                if (schemaLocation.startsWith("/")) {
+                    // The URI is relative to the contribution
+                    String uri = schemaLocation.substring(1);
+                    for (Artifact a : contribution.getArtifacts()) {
+                        if (a.getURI().equals(uri)) {
+                            url = new URL(a.getLocation());
+                            break;
+                        }
+                    }
+                    if (url == null) {
+                        // URI not found in the contribution; return a default InputSource
+                        // so that the XmlSchema code will produce a useful diagnostic
+                        return new InputSource(schemaLocation);
+                    }
+                } else {
+                    url = new URL(new URL(baseUri), schemaLocation);
+                }
+                return XMLDocumentHelper.getInputSource(url);
+            } catch (IOException e) {
+            	// Invalid URI; return a default InputSource so that the
+                // XmlSchema code will produce a useful diagnostic
+                return new InputSource(schemaLocation);
+            } catch (URISyntaxException e) {
+            	// Invalid URI; return a default InputSource so that the
+                // XmlSchema code will produce a useful diagnostic
+                return new InputSource(schemaLocation);
+            }
+        }
+    }
+
+}