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Apache CXF example source code file (SDODataBinding.java)

This example Apache CXF source code file (SDODataBinding.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

class, class, dataobject, datawriter, dom, exception, io, list, list, method, object, object, qname, reflection, sdowrapperhelper, string, string, util

The Apache CXF SDODataBinding.java source code

/**
 * 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.cxf.sdo;

import java.io.StringReader;
import java.io.StringWriter;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;

import org.w3c.dom.Node;

import org.apache.cxf.common.xmlschema.XmlSchemaConstants;
import org.apache.cxf.databinding.AbstractDataBinding;
import org.apache.cxf.databinding.DataReader;
import org.apache.cxf.databinding.DataWriter;
import org.apache.cxf.databinding.WrapperCapableDatabinding;
import org.apache.cxf.databinding.WrapperHelper;
import org.apache.cxf.interceptor.Fault;
import org.apache.cxf.service.Service;
import org.apache.cxf.service.model.ServiceInfo;
import org.apache.tuscany.sdo.api.SDOUtil;
import org.apache.ws.commons.schema.XmlSchema;

import commonj.sdo.DataObject;
import commonj.sdo.Type;
import commonj.sdo.helper.HelperContext;
import commonj.sdo.impl.HelperProvider;


/**
 * 
 */
public class SDODataBinding extends AbstractDataBinding 
    implements WrapperCapableDatabinding { 

    private final class SDOWrapperHelper implements WrapperHelper {
        private final List<String> partNames;
        private Method fact;
        private Object factory;
        private QName wrapperName;

        private SDOWrapperHelper(List<String> partNames, Class wrapperType, QName wrapperName) {
            this.partNames = partNames;
            if (DataObject.class != wrapperType) {
                try {
                    String s = wrapperType.getPackage().getName() + ".SdoFactory";
                    Class<?> cls = Class.forName(s, false, wrapperType.getClassLoader());
                    for (Method m : cls.getMethods()) {
                        if (m.getReturnType() == wrapperType) {
                            fact = m;
                            break;
                        }
                    }
                    factory = cls.getField("INSTANCE").get(null);
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
            this.wrapperName = wrapperName;
        }

        public Object createWrapperObject(List<?> lst) throws Fault {
            DataObject o;
            if (fact != null) {
                try {
                    o = (DataObject)fact.invoke(factory);
                } catch (Exception e) {
                    throw new Fault(e); 
                }
            } else {
                o = context.getDataFactory().create(wrapperName.getNamespaceURI(), 
                                                    wrapperName.getLocalPart());
            }
            for (int x = 0; x < lst.size(); x++) {
                o.set(partNames.get(x), lst.get(x));
            }
            return o;
        }

        public String getSignature() {
            return "" + System.identityHashCode(this);
        }

        public List<Object> getWrapperParts(Object o) throws Fault {
            List<Object> lst = new ArrayList();
            DataObject obj = (DataObject)o;
            for (String s : partNames) {
                lst.add(obj.get(s));
            }
            return lst;
        }
    }



    private static final Class<?> SUPPORTED_READER_FORMATS[] = new Class[] {XMLStreamReader.class};
    private static final Class<?> SUPPORTED_WRITER_FORMATS[]
        = new Class<?>[] {XMLStreamWriter.class, Node.class};
    HelperProvider provider;
    HelperContext context;
    
    public void initialize(Service service) {
        context = SDOUtil.createHelperContext();
        
        Set<String> pkgs = new HashSet();
        for (ServiceInfo serviceInfo : service.getServiceInfos()) {
            SDOClassCollector cc = new SDOClassCollector(serviceInfo);
            cc.walk();
            
            for (Class<?> cls : cc.getClasses()) {
                if (DataObject.class == cls) {
                    continue;
                }
                String pkg = cls.getPackage().getName();
                if (!pkgs.contains(pkg)) {
                    try {
                        Class fact = Class.forName(pkg + ".SdoFactory", false, cls.getClassLoader());
                        registerFactory(fact);
                        pkgs.add(pkg);
                    } catch (Throwable t) {
                        //ignore, register the class itself
                        register(cls);
                    }
                }
            }
        }
        for (ServiceInfo serviceInfo : service.getServiceInfos()) {
            for (XmlSchema schema : serviceInfo.getXmlSchemaCollection().getXmlSchemas()) {
                if (schema.getTargetNamespace().equals(XmlSchemaConstants.XSD_NAMESPACE_URI)) {
                    continue;
                }
                StringWriter writer = new StringWriter();
                schema.write(writer);
                context.getXSDHelper().define(new StringReader(writer.toString()), schema.getSourceURI());
            }
        }        
    }
    void registerFactory(Class<?> factoryClass) throws Exception {
        Field field = factoryClass.getField("INSTANCE");
        Object factory = field.get(null);
        Method method = factory.getClass().getMethod("register", new Class[] {HelperContext.class});
        method.invoke(factory, new Object[] {context});
    }
    boolean register(Class javaType) {
        if (javaType == null || DataObject.class == javaType) {
            return false;
        }
        try {
            Type type = context.getTypeHelper().getType(javaType);
            if (type != null && (!type.isDataType())) {
                Method method = type.getClass().getMethod("getEPackage");
                Object factory = method.invoke(type, new Object[] {});
                method = factory.getClass().getMethod("register", HelperContext.class);
                method.invoke(factory, new Object[] {context});
                return true;
            }
            return false;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }
    @SuppressWarnings("unchecked")
    public <T> DataReader createReader(Class c) {
        DataReader<T> dr = null;
        if (c == XMLStreamReader.class) {
            dr = (DataReader<T>)new DataReaderImpl(context);
        }
        return dr;
    }
    @SuppressWarnings("unchecked")
    public <T> DataWriter createWriter(Class c) {
        if (c == XMLStreamWriter.class) {
            return (DataWriter<T>)new DataWriterImpl(context);
        } else if (c == Node.class) {
            return (DataWriter<T>)new NodeDataWriterImpl(context);
        }
        return null;
    }
    public Class<?>[] getSupportedReaderFormats() {
        return SUPPORTED_READER_FORMATS;
    }

    public Class<?>[] getSupportedWriterFormats() {
        return SUPPORTED_WRITER_FORMATS;
    }

    
    
    public WrapperHelper createWrapperHelper(final Class<?> wrapperType,
                                             final QName wrapperName, 
                                             final List<String> partNames,
                                             final List<String> elTypeNames,
                                             final List<Class partClasses) {
        
        
        return new SDOWrapperHelper(partNames, wrapperType, wrapperName);
    }
}

Other Apache CXF examples (source code examples)

Here is a short list of links related to this Apache CXF SDODataBinding.java source code file:

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