org.jboss.resteasy.plugins.providers.jaxb.XmlAdapterWrapper Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of resteasy-jaxb-provider Show documentation
There is a newer version: 7.0.0.Alpha4
Show newest version
package org.jboss.resteasy.plugins.providers.jaxb;

import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;

import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

import org.jboss.resteasy.spi.util.FindAnnotation;
import org.jboss.resteasy.spi.util.Types;

/**
 *
 * @author Ron Sigal
 * @version $Revision: 1.1 $
 *
 *          Copyright Apr 8, 2015
 */
class XmlAdapterWrapper extends XmlAdapter {
    private XmlAdapter delegate;
    private Class clazz;

    XmlAdapterWrapper(final XmlAdapter delegate, final Class clazz) {
        this.delegate = delegate;
        this.clazz = clazz;
    }

    @Override
    public Object unmarshal(Object v) throws Exception {
        return delegate.unmarshal(v);
    }

    @Override
    public Object marshal(Object v) throws Exception {
        return delegate.marshal(v);
    }

    public Class getValueType() {
        return clazz;
    }

    protected static Class xmlAdapterValueType(Class baseType, Annotation[] annotations) {
        Class clazz = baseType;
        if (baseType.isAnnotationPresent(XmlJavaTypeAdapter.class)) {
            XmlJavaTypeAdapter xmlJavaTypeAdapter = FindAnnotation.findAnnotation(baseType, annotations,
                    XmlJavaTypeAdapter.class);
            Class adapterClass = xmlJavaTypeAdapter.value();
            ParameterizedType xmlAdapterType = ParameterizedType.class.cast(adapterClass.getGenericSuperclass());
            Class valueType = Types.getArgumentType(xmlAdapterType, 0);
            Class boundType = Types.getArgumentType(xmlAdapterType, 1);
            if (boundType.isAssignableFrom(baseType)) {
                clazz = valueType;
            }
        }
        return clazz;
    }

    @SuppressWarnings("unchecked")
    protected static XmlAdapterWrapper getXmlAdapter(Class baseType, Annotation[] annotations) {
        if (baseType.isAnnotationPresent(XmlJavaTypeAdapter.class)) {
            XmlJavaTypeAdapter xmlJavaTypeAdapter = FindAnnotation.findAnnotation(baseType, annotations,
                    XmlJavaTypeAdapter.class);
            Class adapterClass = xmlJavaTypeAdapter.value();
            ParameterizedType xmlAdapterType = ParameterizedType.class.cast(adapterClass.getGenericSuperclass());
            Class boundType = Types.getArgumentType(xmlAdapterType, 1);
            if (boundType.isAssignableFrom(baseType)) {
                try {
                    Class valueType = Types.getArgumentType(xmlAdapterType, 0);
                    return new XmlAdapterWrapper(adapterClass.newInstance(), valueType);
                } catch (Exception e) {
                    throw new JAXBMarshalException(e);
                }
            }
        }
        return null;
    }
}