aegisbindingprovider.java

Xfire文件 用于开发web service 的一个开源工具 很好用的

package org.codehaus.xfire.aegis;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.codehaus.xfire.MessageContext;
import org.codehaus.xfire.XFireRuntimeException;
import org.codehaus.xfire.aegis.stax.ElementReader;
import org.codehaus.xfire.aegis.stax.ElementWriter;
import org.codehaus.xfire.aegis.type.Configuration;
import org.codehaus.xfire.aegis.type.DefaultTypeMappingRegistry;
import org.codehaus.xfire.aegis.type.Type;
import org.codehaus.xfire.aegis.type.TypeCreator;
import org.codehaus.xfire.aegis.type.TypeMapping;
import org.codehaus.xfire.aegis.type.TypeMappingRegistry;
import org.codehaus.xfire.aegis.type.basic.BeanType;
import org.codehaus.xfire.aegis.type.basic.ObjectType;
import org.codehaus.xfire.fault.XFireFault;
import org.codehaus.xfire.service.MessagePartContainer;
import org.codehaus.xfire.service.MessagePartInfo;
import org.codehaus.xfire.service.OperationInfo;
import org.codehaus.xfire.service.Service;
import org.codehaus.xfire.service.binding.AbstractBindingProvider;
import org.codehaus.xfire.soap.SoapConstants;
import org.codehaus.xfire.util.ClassLoaderUtils;
import org.codehaus.xfire.util.NamespaceHelper;
import org.codehaus.xfire.wsdl.SchemaType;
import org.codehaus.xfire.wsdl11.builder.WSDLBuilder;

/**
 * A BindingProvider for the Aegis type system.
 * 
 * @author <a href="mailto:[e-mail]">Dan Diephouse</a>
 */
public class AegisBindingProvider
    extends AbstractBindingProvider
{
    public static final Log LOG = LogFactory.getLog(AegisBindingProvider.class);

    public static final String CURRENT_MESSAGE_PART = "currentMessagePart";

    public static final String TYPE_MAPPING_KEY = "type.mapping";

    public static final String ENCODING_URI_KEY = "type.encodingUri";

    public static final String WRITE_XSI_TYPE_KEY = "writeXsiType";

    public static final String READ_XSI_TYPE_KEY = "readXsiType";

    public static final String OVERRIDE_TYPES_KEY = "overrideTypesList";

    private TypeMappingRegistry registry;

    private Map part2type = new HashMap();

    public AegisBindingProvider()
    {
        this(new DefaultTypeMappingRegistry(true));
    }

    public AegisBindingProvider(TypeCreator creator)
    {
        this(new DefaultTypeMappingRegistry(creator, true));
    }
    
    public AegisBindingProvider(TypeCreator creator, Configuration config)
    {
        this(new DefaultTypeMappingRegistry(creator, true,config));
        
    }
    public AegisBindingProvider(TypeMappingRegistry registry)
    {
        this.registry = registry;
    }


	public TypeMappingRegistry getTypeMappingRegistry()
    {
        return registry;
    }

    public void setTypeMappingRegistry(TypeMappingRegistry registry)
    {
        this.registry = registry;
    }
    
    public void initialize(Service service)
    {
        List classes = (List) service.getProperty(OVERRIDE_TYPES_KEY);

        if (classes != null)
        {
            List types = new ArrayList();
            TypeMapping tm = getTypeMapping(service);
            for (Iterator it = classes.iterator(); it.hasNext();)
            {
                String typeName = (String) it.next();
                Class c;
                try
                {
                    c = ClassLoaderUtils.loadClass(typeName, AegisBindingProvider.class);
                }
                catch (ClassNotFoundException e)
                {
                    throw new XFireRuntimeException("Could not find override type class: " + typeName, e);
                }
                
                Type t = tm.getType(c);
                if (t == null)
                {
                    t = tm.getTypeCreator().createType(c);
                    tm.register(t);
                }
                if (t instanceof BeanType)
                {
                    BeanType bt = (BeanType) t;
                    bt.getTypeInfo().setExtension(true);
                    types.add(bt);
                }
            }
            service.setProperty(WSDLBuilder.OVERRIDING_TYPES, types);
        }
        
        super.initialize(service);
    }


    protected void initializeMessage(Service service, MessagePartContainer container, int type)
    {
        for (Iterator itr = container.getMessageParts().iterator(); itr.hasNext();)
        {
            MessagePartInfo part = (MessagePartInfo) itr.next();

            if (part.getSchemaType() == null)
            {
                part.setSchemaType(getParameterType(getTypeMapping(service), part, type));
            }
        }
    }

    public Object readParameter(MessagePartInfo p, XMLStreamReader xsr, MessageContext context)
        throws XFireFault
    {
        Type type = getTypeMapping(context.getService()).getType(xsr.getName());

        if (type == null)
            type = (Type) p.getSchemaType();
        
        type = getReadType(xsr, context, type);

        MessageReader reader = new ElementReader(xsr);

        if (reader.isXsiNil())
        {
            reader.readToEnd();
            return null;
        }

        context.setProperty(CURRENT_MESSAGE_PART, p);
        return type.readObject(reader, context);
    }

    public static Type getReadType(XMLStreamReader xsr, MessageContext context, Type type)
    {
    	return getReadType(xsr, context, type, type.getTypeMapping());
    }
    
    public static Type getReadType(XMLStreamReader xsr, MessageContext context, Type type, TypeMapping tm)
    {
    	if (context.getService() != null)
    	{
	    	Object readXsi = context.getService().getProperty(AegisBindingProvider.READ_XSI_TYPE_KEY);
	    	if ((Boolean.FALSE.equals(readXsi) || "false".equals(readXsi))) 
	    	{
	    		return type;
	    	}
    	}
    	
        String overrideType = xsr.getAttributeValue(SoapConstants.XSI_NS, "type");
        if (overrideType != null)
        {
            QName overrideTypeName = NamespaceHelper.createQName(xsr.getNamespaceContext(),
                                                                 overrideType);
            if (!overrideTypeName.equals(type.getSchemaType()))
            {
                Type type2 = type.getTypeMapping().getType(overrideTypeName);
                if (type2 == null)
                {
                    LOG.info("xsi:type=\"" + overrideTypeName
                             + "\" was specified, but no corresponding Type was registered; defaulting to "
                             + type.getSchemaType());
                }
                else
                {
                    type = type2;
                }
            }
        }
        return type;
    }

    public void writeParameter(MessagePartInfo p,
                               XMLStreamWriter writer,
                               MessageContext context,
                               Object value)
        throws XFireFault
    {
        Type type = (Type) p.getSchemaType();

        type = getWriteType(context, value, type);
        MessageWriter mw = new ElementWriter(writer);

        if (type.isNillable() && type.isWriteOuter() && value == null)
        {
            mw.writeXsiNil();
            return;
        }

        context.setProperty(CURRENT_MESSAGE_PART, p);
        type.writeObject(value, mw, context);
    }

    public static Type getWriteType(MessageContext context, Object value, Type type)
    {
        if (value != null && type != null && type.getTypeClass() != value.getClass()
                && context.getService() != null)
        {
            List l = (List) context.getService().getProperty(OVERRIDE_TYPES_KEY);
            if (l != null && l.contains(value.getClass().getName()))
            {
                type = type.getTypeMapping().getType(value.getClass());
            }
        }
        return type;
    }

    public QName getSuggestedName(Service service, OperationInfo op, int param)
    {
        TypeMapping tm = getTypeMapping(service);
        QName name = tm.getTypeCreator().getElementName(op.getMethod(), param);

        // No mapped name was specified, so if its a complex type use that name
        // instead
        if (name == null)
        {
            Type type = tm.getTypeCreator().createType(op.getMethod(), param);

            if (type.isComplex() && !type.isAbstract())
                name = type.getSchemaType();
        }

        return name;
    }

    private Type getParameterType(TypeMapping tm, MessagePartInfo param, int paramtype)
    {
        Type type = tm.getType(param.getName());

        if (type == null)
        {
            type = (Type) part2type.get(param);
        }

        /*
         * if (type == null && tm.isRegistered(param.getTypeClass())) { type =
         * tm.getType(param.getTypeClass()); part2type.put(param, type); }
         */

        if (type == null)
        {
            OperationInfo op = param.getContainer().getOperation();

            if (paramtype != FAULT_PARAM)
            {
                /*
                 * Note: we are not registering the type here, because it is an
                 * anonymous type. Potentially there could be many schema types
                 * with this name. For example, there could be many ns:in0
                 * paramters.
                 */
                type = tm.getTypeCreator().createType(op.getMethod(), param.getIndex());
            }
            else
            {
                type = tm.getTypeCreator().createType(param.getTypeClass());
            }

            type.setTypeMapping(tm);
            part2type.put(param, type);
        }

        return type;
    }

    public TypeMapping getTypeMapping(Service service)
    {
        TypeMapping tm = (TypeMapping) service.getProperty(TYPE_MAPPING_KEY);

        if (tm == null)
            tm = createTypeMapping(service);

        return tm;
    }

    protected TypeMapping createTypeMapping(Service endpoint)
    {
        // TypeMapping tm =
        // registry.getTypeMapping(endpoint.getTargetNamespace());
        // if (tm != null) return tm;

        String encodingStyle = (String) endpoint.getProperty(ENCODING_URI_KEY);

        if (encodingStyle == null)
        {
            encodingStyle = SoapConstants.XSD;
        }

        endpoint.setProperty(ENCODING_URI_KEY, encodingStyle);
        TypeMapping tm = registry.createTypeMapping(encodingStyle, true);

        endpoint.setProperty(TYPE_MAPPING_KEY, tm);
        registry.register(endpoint.getName().getNamespaceURI(), tm);

        return tm;
    }

    public Class getTypeClass(QName name, Service service)
    {
        TypeMapping tm;
        if (service != null)
            tm = getTypeMapping(service);
        else
            tm = registry.getDefaultTypeMapping();

        Type type = tm.getType(name);

        if (type == null)
            return null;

        return type.getTypeClass();
    }

    public SchemaType getSchemaType(QName name, Service service)
    {
        TypeMapping tm;
        if (service != null)
            tm = getTypeMapping(service);
        else
            tm = registry.getDefaultTypeMapping();

        Type type = tm.getType(name);

        if (type == null)
        {
            ObjectType ot = new ObjectType();
            ot.setTypeMapping(tm);
            ot.setSchemaType(name);
            type = ot;
        }

        return type;
    }

    public Type getType(Service service, Class clazz)
    {
        TypeMapping tm = getTypeMapping(service);
        Type type = tm.getType(clazz);

        if (type == null)
        {
            type = tm.getTypeCreator().createType(clazz);
            tm.register(type);
        }

        return type;
    }
}