/*
 * ModeShape (http://www.modeshape.org)
 *
 * 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 org.modeshape.jboss.subsystem;

import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP_ADDR;
import javax.jcr.RepositoryException;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.PathElement;
import org.jboss.dmr.ModelNode;
import org.modeshape.jboss.service.RepositoryService;

/**
 * An {@link OperationStepHandler} implementation that handles changes to the model values for an index definitions submodel's
 * {@link AttributeDefinition attribute definitions}. Those attributes that can be changed
 * {@link org.jboss.as.controller.registry.AttributeAccess.Flag#RESTART_NONE RESTART_NONE without restarting} will be immediately
 * reflected in the repository's configuration; other attributes will be changed in the submodel and used upon the next restart.
 */
public class IndexDefinitionWriteAttributeHandler extends AbstractRepositoryConfigWriteAttributeHandler {

    static final IndexDefinitionWriteAttributeHandler INSTANCE = new IndexDefinitionWriteAttributeHandler();

    private IndexDefinitionWriteAttributeHandler() {
        super(ModelAttributes.INDEX_PROVIDER_ATTRIBUTES);
    }

    @Override
    protected boolean changeField( OperationContext context,
                                   ModelNode operation,
                                   RepositoryService repositoryService,
                                   MappedAttributeDefinition defn,
                                   ModelNode newValue ) throws RepositoryException, OperationFailedException {
        String sequencerName = providerName(operation);
        repositoryService.changeIndexDefinitionField(defn, newValue, sequencerName);
        return true;
    }

    protected final String providerName( ModelNode operation ) {
        PathAddress address = PathAddress.pathAddress(operation.get(OP_ADDR));
        PathElement element = address.getElement(2);
        return element.getValue();
    }

}
