org.cloudgraph.store.service.CommitComparator Maven / Gradle / Ivy

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/**
 * Copyright 2017 TerraMeta Software, Inc.
 * 
 * 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.cloudgraph.store.service;

import java.io.Serializable;
import java.util.Comparator;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.plasma.sdo.AssociationPath;
import org.plasma.sdo.PlasmaNode;
import org.plasma.sdo.PlasmaType;
import org.plasma.sdo.core.CoreDataObject;

import commonj.sdo.DataObject;
import commonj.sdo.Property;

public abstract class CommitComparator implements Comparator, Serializable {

  private static final long serialVersionUID = 1L;
  private static Log log = LogFactory.getFactory().getInstance(CommitComparator.class);

  protected boolean isSingularRelation(DataObject target, DataObject source) {
    return (((PlasmaType) target.getType()).isRelation((PlasmaType) source.getType(),
        AssociationPath.singular));
  }

  protected boolean hasChildLink(DataObject target, DataObject source) {

    if (log.isDebugEnabled())
      log.debug("comparing " + target.toString() + "/" + source.toString());

    for (Property property : target.getType().getProperties()) {
      if (property.getType().isDataType())
        continue;
      if (property.isMany())
        continue;

      Object value = target.get(property);
      if (value == null)
        continue;

      if (log.isDebugEnabled())
        log.debug("checking property " + target.getType().getName() + "." + property.getName());

      if (isLinked(source, value)) {
        if (log.isDebugEnabled())
          log.debug("found child data link " + target.getType().getName() + "."
              + property.getName() + "->" + source.getType().getName());
        return true;
      }
    }
    return false;
  }

  protected boolean isLinked(DataObject other, Object value) {
    if (value instanceof List) {
      List list = (List) value;
      for (DataObject dataObject : list) {
        PlasmaNode dataNode = (PlasmaNode) dataObject;
        if (dataNode.getUUIDAsString().equals(((PlasmaNode) other).getUUIDAsString())) {
          return true;
        }
      }
    } else {
      DataObject dataObject = (DataObject) value;
      PlasmaNode dataNode = (PlasmaNode) dataObject;
      if (dataNode.getUUIDAsString().equals(((PlasmaNode) other).getUUIDAsString())) {
        return true;
      }
    }
    return false;
  }
}