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Core Implementation of LD Path a simple path-based query language similar to XPath or SPARQL Property Paths that is particularly well-suited for querying and retrieving resources from the Linked Data Cloud by following RDF links between resources and servers.

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/*
 * Copyright (c) 2011 Salzburg Research.
 *
 * Licensed 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 at.newmedialab.ldpath.model.transformers;

import at.newmedialab.ldpath.api.backend.RDFBackend;
import at.newmedialab.ldpath.api.transformers.NodeTransformer;

/**
 * A very simple transformer that only returns the node itself. Used in case no transformer is given in a
 * field mapping.
 * 
 * Author: Sebastian Schaffert
 */
public class IdentityTransformer implements NodeTransformer {

    /**
     * Transform the KiWiNode node into the datatype T. In case the node cannot be transformed to
     * the respective datatype, throws an IllegalArgumentException that needs to be caught by the class
     * carrying out the transformation.
     *
     * @param node
     * @return
     */
    @Override
    public Node transform(RDFBackend nodeRDFBackend, Node node) throws IllegalArgumentException {
        return node;
    }
}