Examples of org.apache.cayenne.map.EntityResolver

org.apache.cayenne.map.EntityResolver
Represents a virtual shared namespace for zero or more DataMaps. Unlike DataMap, EntityResolver is intended to work as a runtime container of mapping. DataMaps can be added or removed dynamically at runtime.
EntityResolver is thread-safe.
@since 1.1 @author Andrus Adamchik

     * Removes current object from reverse relationship of object <code>val</code> to
     * this object.
     */
    protected void unsetReverseRelationship(String relName, DataObject val) {


        EntityResolver resolver = objectContext.getEntityResolver();
        ObjEntity entity = resolver.lookupObjEntity(objectId.getEntityName());


        if (entity == null) {
            throw new IllegalStateException("DataObject's entity is unmapped, objectId: "
                    + objectId);
        }

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     * Encodes object to XML using provided encoder.
     * 
     * @since 1.2
     */
    public void encodeAsXML(XMLEncoder encoder) {
        EntityResolver er = getDataContext().getEntityResolver();
        ObjEntity object = er.lookupObjEntity(getClass());


        String[] fields = this.getClass().getName().split("\\.");
        encoder.setRoot(fields[fields.length - 1], this.getClass().getName());


        for (Iterator it = object.getDeclaredAttributes().iterator(); it.hasNext();) {

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                .getDomain()
                .getDataNodes()
                .iterator(); it.hasNext();) {
            DataNode dn = (DataNode) it.next();


            EntityResolver er = dn.getEntityResolver();
            object = er.lookupObjEntity(getClass());


            if (null != object) {
                break;
            }
        }

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     * 
     * @since 3.0
     */
    protected Object getMapKey(String relationshipName, Object value) {


        EntityResolver resolver = objectContext.getEntityResolver();
        ClassDescriptor descriptor = resolver
                .getClassDescriptor(objectId.getEntityName());


        if (descriptor == null) {
            throw new IllegalStateException("DataObject's entity is unmapped, objectId: "
                    + objectId);

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     * 
     * @since 3.0
     */
    private Object getMapKey(String relationshipName, Object value) {


        EntityResolver resolver = objectContext.getEntityResolver();
        ClassDescriptor descriptor = resolver
                .getClassDescriptor(objectId.getEntityName());


        if (descriptor == null) {
            throw new IllegalStateException("DataObject's entity is unmapped, objectId: "
                    + objectId);

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     * Removes current object from reverse relationship of object <code>val</code> to
     * this object.
     */
    protected void unsetReverseRelationship(String relName, DataObject val) {


        EntityResolver resolver = objectContext.getEntityResolver();
        ObjEntity entity = resolver.getObjEntity(objectId.getEntityName());


        if (entity == null) {
            throw new IllegalStateException("DataObject's entity is unmapped, objectId: "
                    + objectId);
        }

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     * Encodes object to XML using provided encoder.
     * 
     * @since 1.2
     */
    public void encodeAsXML(XMLEncoder encoder) {
        EntityResolver er = getObjectContext().getEntityResolver();
        ObjEntity objectEntity = er.lookupObjEntity(getClass());


        String[] fields = this.getClass().getName().split("\\.");
        encoder.setRoot(fields[fields.length - 1], this.getClass().getName());


        for (final ObjAttribute att : objectEntity.getDeclaredAttributes()) {

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        // TODO: (andrus, long time ago) relying on singleton Configuration and a single
        // DataDomain is a very bad idea... Decoder itself can optionally store a
        // DataContext or an EntityResolver to provide the context appropriate for a given
        // environment
        EntityResolver resolver = Configuration
                .getSharedConfiguration()
                .getDomain()
                .getEntityResolver();
        ObjEntity objectEntity = resolver.lookupObjEntity(getClass());


        for (final ObjAttribute att : objectEntity.getDeclaredAttributes()) {
            String name = att.getName();
            writeProperty(name, decoder.decodeObject(name));
        }

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        // retain the object, as ObjectStore may have weak references to registered
        // objects and we can't allow it to deallocate dirty objects.
        this.object = object;


        EntityResolver entityResolver = object.getObjectContext().getEntityResolver();


        this.entityName = object.getObjectId().getEntityName();
        this.classDescriptor = entityResolver.getClassDescriptor(entityName);


        int state = object.getPersistenceState();


        // take snapshot of simple properties and arcs used for optimistic locking..


        if (state == PersistenceState.COMMITTED
                || state == PersistenceState.DELETED
                || state == PersistenceState.MODIFIED) {


            ObjEntity entity = entityResolver.getObjEntity(entityName);
            final boolean lock = entity.getLockType() == ObjEntity.LOCK_TYPE_OPTIMISTIC;


            this.snapshot = new HashMap<String, Object>();
            this.arcSnapshot = new HashMap<String, Object>();

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    }


    ClassDescriptor getClassDescriptor() {
        // class descriptor is initiated in constructor, but is nullified on serialization
        if (classDescriptor == null) {
            EntityResolver entityResolver = object.getObjectContext().getEntityResolver();
            this.classDescriptor = entityResolver.getClassDescriptor(entityName);
        }


        return classDescriptor;
    }

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