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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.lang;

import java.util.List;
import java.util.Map;

import org.plasma.sdo.PlasmaProperty;
import org.plasma.sdo.PlasmaType;
import org.plasma.sdo.access.DataAccessException;
import org.plasma.sdo.access.provider.common.PropertyPair;
import org.plasma.sdo.profile.KeyType;

import commonj.sdo.Property;

/**
 * Common graph assembler functionality resulting from initial re-factoring and
 * addition of parallel assembly across RDB and Cassandra services.
 * 
 * @author Scott Cinnamond
 * @since 0.6.2
 */
public class StatementUtil {

  public PlasmaProperty getOppositePriKeyProperty(Property targetProperty) {
    PlasmaProperty opposite = (PlasmaProperty) targetProperty.getOpposite();
    PlasmaType oppositeType = null;

    if (opposite != null) {
      oppositeType = (PlasmaType) opposite.getContainingType();
    } else {
      oppositeType = (PlasmaType) targetProperty.getType();
    }

    List pkeyProps = oppositeType.findProperties(KeyType.primary);
    if (pkeyProps.size() == 0) {
      throw new DataAccessException("no opposite pri-key properties found"
          + " - cannot map from reference property, " + targetProperty.toString());
    }
    PlasmaProperty supplier = ((PlasmaProperty) targetProperty).getKeySupplier();
    if (supplier != null) {
      return supplier;
    } else if (pkeyProps.size() == 1) {
      return (PlasmaProperty) pkeyProps.get(0);
    } else {
      throw new DataAccessException("multiple opposite pri-key properties found"
          + " - cannot map from reference property, " + targetProperty.toString()
          + " - please add a derivation supplier");
    }
  }

  public boolean hasUpdatableProperties(Map values) {

    for (PropertyPair pair : values.values()) {
      PlasmaProperty prop = pair.getProp();
      if (prop.isMany() && !prop.getType().isDataType())
        continue; // no such thing as updatable many reference property
      // in RDBMS
      if (prop.isKey(KeyType.primary))
        if (pair.getOldValue() == null) // key not modified, we're not
          // updating it
          continue;
      return true;
    }
    return false;
  }

  public String getQualifiedPhysicalName(PlasmaType type) {
    String packageName = type.getPackagePhysicalName();
    if (packageName != null)
      return packageName + "." + type.getPhysicalName();
    else
      return type.getPhysicalName();
  }

}