java5typecreator.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.type.java5;

import java.beans.PropertyDescriptor;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.WildcardType;
import java.util.Collection;

import javax.xml.namespace.QName;

import org.codehaus.xfire.aegis.type.AbstractTypeCreator;
import org.codehaus.xfire.aegis.type.Type;
import org.codehaus.xfire.aegis.type.basic.BeanType;
import org.codehaus.xfire.util.NamespaceHelper;
import org.codehaus.xfire.util.ServiceUtils;

public class Java5TypeCreator
    extends AbstractTypeCreator
{

    @Override
    public TypeClassInfo createClassInfo(Method m, int index)
    {
        if (index >= 0)
        {
            TypeClassInfo info;
            java.lang.reflect.Type genericType = m.getGenericParameterTypes()[index];
            if (genericType instanceof Class)
            {
                info = nextCreator.createClassInfo(m, index);
            }
            else
            {
                info = new TypeClassInfo();
                info.setGenericType(genericType);
            }
            info.setTypeClass(m.getParameterTypes()[index]);

            XmlParamType xmlParam = getXmlParamAnnotation(m, index);
            if (xmlParam != null)
            {
                if (xmlParam.type() != Type.class)
                    info.setType(xmlParam.type());

                info.setTypeName(createQName(m.getParameterTypes()[index],
                                             xmlParam.name(),
                                             xmlParam.namespace()));
            }

            return info;
        }
        else
        {
            java.lang.reflect.Type genericReturnType = m.getGenericReturnType();
            TypeClassInfo info;
            if (genericReturnType instanceof Class)
            {
                info = nextCreator.createClassInfo(m, index);
            }
            else
            {
                info = new TypeClassInfo();
                info.setGenericType(genericReturnType);
            }
            info.setTypeClass(m.getReturnType());
            if (m.getParameterAnnotations() != null && m.getAnnotations().length > 0)
                info.setAnnotations(m.getAnnotations());

            XmlReturnType xmlParam = m.getAnnotation(XmlReturnType.class);
            if (xmlParam != null)
            {
                if (xmlParam.type() != Type.class)
                    info.setType(xmlParam.type());

                info.setTypeName(createQName(m.getReturnType(), xmlParam.name(), xmlParam
                        .namespace()));
            }

            return info;
        }
    }

    public XmlParamType getXmlParamAnnotation(Method m, int index)
    {
        if (m.getParameterAnnotations() == null
                || m.getParameterAnnotations().length <= index
                || m.getParameterAnnotations()[index] == null)
            return null;

        Annotation[] annotations = m.getParameterAnnotations()[index];

        for (int i = 0; i < annotations.length; i++)
        {
            Annotation annotation = annotations[i];
            if (annotation.annotationType().equals(XmlParamType.class))
            {
                return (XmlParamType) annotations[i];
            }
        }

        return null;
    }

    @Override
    public TypeClassInfo createClassInfo(PropertyDescriptor pd)
    {
        TypeClassInfo info = createBasicClassInfo(pd.getPropertyType());
        info.setGenericType(pd.getReadMethod().getGenericReturnType());
        info.setAnnotations(pd.getReadMethod().getAnnotations());

        XmlElement el = pd.getReadMethod().getAnnotation(XmlElement.class);
        if (el != null && !el.type().equals(Type.class))
        {
            info.setType(el.type());
        }

        XmlAttribute att = pd.getReadMethod().getAnnotation(XmlAttribute.class);
        if (att != null && !att.type().equals(Type.class))
        {
            info.setType(att.type());
        }

        return info;
    }

    @Override
    public Type createCollectionType(TypeClassInfo info)
    {
        Object genericType = info.getGenericType();
        Class paramClass = getComponentType(genericType, 0);
        
        if (paramClass != null)
        {
            return createCollectionTypeFromGeneric(info);
        }
        else
        {
            return nextCreator.createCollectionType(info);
        }
    }

    protected Type getOrCreateGenericType(TypeClassInfo info)
    {
        return getOrCreateParameterizedType(info.getGenericType(), 0);
    }

    protected Type getOrCreateMapKeyType(TypeClassInfo info)
    {
        return getOrCreateParameterizedType(info.getGenericType(), 0);
    }

    protected Type getOrCreateMapValueType(TypeClassInfo info)
    {
        return getOrCreateParameterizedType(info.getGenericType(), 1);
    }

    protected Type getOrCreateParameterizedType(Object generic, int index)
    {
        Class clazz = getComponentType(generic, index);

        if (!Collection.class.isAssignableFrom(clazz)) {
        	return getTopCreator().createType(clazz);
        }
        
        Object component = getGenericComponent(generic, index);
        
        TypeClassInfo info = createBasicClassInfo(clazz);
        info.setDescription(clazz.toString());
        info.setGenericType(component);
        
        Type type = createTypeForClass(info);
        
        return type;
    }

    private Object getGenericComponent(Object genericType, int index)
    {
        if (genericType instanceof ParameterizedType)
        {
            ParameterizedType type = (ParameterizedType) genericType;

            if (type.getActualTypeArguments()[index] instanceof WildcardType)
            {
                WildcardType wildcardType = (WildcardType) type.getActualTypeArguments()[index];

                return wildcardType;
            }
            else if (type.getActualTypeArguments()[index] instanceof ParameterizedType)
            {
                ParameterizedType ptype = (ParameterizedType) type.getActualTypeArguments()[index];
                
                return ptype;
            }
        }
        
        return null;
    }

    protected Class getComponentType(Object genericType, int index)
    {
        Class paramClass = null;

        if (genericType instanceof ParameterizedType)
        {
            ParameterizedType type = (ParameterizedType) genericType;

            if (type.getActualTypeArguments()[index] instanceof Class)
            {
                paramClass = (Class) type.getActualTypeArguments()[index];
            }

            else if (type.getActualTypeArguments()[index] instanceof WildcardType)
            {
                WildcardType wildcardType = (WildcardType) type.getActualTypeArguments()[index];

                if (wildcardType.getUpperBounds()[index] instanceof Class)
                {
                    paramClass = (Class) wildcardType.getUpperBounds()[index];
                }
            }
            else if (type.getActualTypeArguments()[index] instanceof ParameterizedType)
            {
                ParameterizedType ptype = (ParameterizedType) type.getActualTypeArguments()[index];
                paramClass = (Class) ptype.getRawType();
            }
        }
        return paramClass;
    }

    @SuppressWarnings("unchecked")
    @Override
    public Type createDefaultType(TypeClassInfo info)
    {
        QName typeName = info.getTypeName();
        if (typeName == null)
            typeName = createQName(info.getTypeClass());

        AnnotatedTypeInfo typeInfo = new AnnotatedTypeInfo(getTypeMapping(), info.getTypeClass(),
                typeName.getNamespaceURI());
        XmlType xtype = (XmlType) info.getTypeClass().getAnnotation(XmlType.class);
        if (xtype != null)
        {
            typeInfo.setExtensibleElements(xtype.extensibleElements());
            typeInfo.setExtensibleAttributes(xtype.extensibleAttributes());
        }
        else
        {
            typeInfo.setExtensibleElements(getConfiguration().isDefaultExtensibleElements());
            typeInfo.setExtensibleAttributes(getConfiguration().isDefaultExtensibleAttributes());
        }
        
        typeInfo.setDefaultMinOccurs( getConfiguration().getDefaultMinOccurs() );
        typeInfo.setDefaultNillable( getConfiguration().isDefaultNillable() );

        BeanType type = new BeanType(typeInfo);
        type.setTypeMapping(getTypeMapping());
        type.setSchemaType(typeName);
        
        return type;
    }

    @Override
    public Type createEnumType(TypeClassInfo info)
    {
        EnumType type = new EnumType();

        type.setSchemaType(createQName(info.getTypeClass()));
        type.setTypeClass(info.getTypeClass());
        type.setTypeMapping(getTypeMapping());

        return type;
    }

    @SuppressWarnings("unchecked")
    @Override
    public QName createQName(Class typeClass)
    {
        String name = null;
        String ns = null;

        XmlType xtype = (XmlType) typeClass.getAnnotation(XmlType.class);
        if (xtype != null)
        {
            name = xtype.name();
            ns = xtype.namespace();
        }

        return createQName(typeClass, name, ns);
    }

    private QName createQName(Class typeClass, String name, String ns)
    {
        String clsName = typeClass.getName();
        if (name == null || name.length() == 0)
            name = ServiceUtils.makeServiceNameFromClassName(typeClass);

        if (ns == null || ns.length() == 0)
            ns = NamespaceHelper.makeNamespaceFromClassName(clsName, "http");

        return new QName(ns, name);
    }

    @Override
    protected boolean isEnum(Class javaType)
    {
        return javaType.isEnum();
    }
}