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package atom.app.kie;

import atom.app.Activity;
import atom.app.KieActivity;
import atom.kie.AbstractTask;
import org.jbpm.workflow.core.node.DataAssociation;
import org.kie.api.runtime.process.WorkItem;
import org.kie.api.runtime.process.WorkItemManager;
import org.kie.internal.runtime.StatefulKnowledgeSession;

import javax.jcr.Node;
import javax.jcr.Property;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.Value;
import java.math.BigDecimal;
import java.util.Calendar;
import java.util.Map;

/**
 * Read entity work item handler with KIE session.
 *
 * @author Alex Voloshyn
 * @author Vladimir Ovcharov
 * @version 1.4 3/10/15
 */
public final class ReadEntityTaskWorkItemHandler extends AbstractTask {
    /**
     * Default constructor with KIE session.
     *
     * @param kieSession KIE session to use
     */
    public ReadEntityTaskWorkItemHandler(
            final StatefulKnowledgeSession kieSession) {
        super(kieSession);
    }

    @Override
    public void executeWorkItem(final WorkItem item,
                                final WorkItemManager manager) {
        final String identifier = (String) item.getParameters().remove("id");
        final Activity activity =
                (Activity) getVariable(item, KieActivity.ACTIVITY);
        try {
            final Session session = activity.getNewJcrSession();
            final Node entity = session.getNodeByIdentifier(identifier);
            final Map results = item.getResults();
            for (DataAssociation association : getOutAssociations(item)) {
                for (String source : association.getSources()) {
                    if (!entity.hasProperty(source)) {
                        continue;
                    }
                    final Property property = entity.getProperty(source);
                    switch (property.getType()) {
                        case PropertyType.STRING:
                            if (property.isMultiple()) {
                                final Value[] values = property.getValues();
                                final String[] result =
                                        new String[values.length];
                                for (int i = 0; i < values.length; i++) {
                                    result[i] = values[i].getString();
                                }
                                results.put(source, result);
                            } else {
                                results.put(source, property.getString());
                            }
                            break;
                        case PropertyType.BOOLEAN:
                            if (property.isMultiple()) {
                                final Value[] values = property.getValues();
                                final Boolean[] result =
                                        new Boolean[values.length];
                                for (int i = 0; i < values.length; i++) {
                                    result[i] = values[i].getBoolean();
                                }
                                results.put(source, result);
                            } else {
                                results.put(source, property.getBoolean());
                            }
                            break;
                        case PropertyType.LONG:
                            if (property.isMultiple()) {
                                final Value[] values = property.getValues();
                                final Long[] result = new Long[values.length];
                                for (int i = 0; i < values.length; i++) {
                                    result[i] = values[i].getLong();
                                }
                                results.put(source, result);
                            } else {
                                results.put(source, property.getLong());
                            }
                            break;
                        case PropertyType.DOUBLE:
                            if (property.isMultiple()) {
                                final Value[] values = property.getValues();
                                final Double[] result =
                                        new Double[values.length];
                                for (int i = 0; i < values.length; i++) {
                                    result[i] = values[i].getDouble();
                                }
                                results.put(source, result);
                            } else {
                                results.put(source, property.getDouble());
                            }
                            break;
                        case PropertyType.DATE:
                            if (property.isMultiple()) {
                                final Value[] values = property.getValues();
                                final Calendar[] result =
                                        new Calendar[values.length];
                                for (int i = 0; i < values.length; i++) {
                                    result[i] = values[i].getDate();
                                }
                                results.put(source, result);
                            } else {
                                results.put(source, property.getDate());
                            }
                            break;
                        case PropertyType.DECIMAL:
                            if (property.isMultiple()) {
                                final Value[] values = property.getValues();
                                final BigDecimal[] result =
                                        new BigDecimal[values.length];
                                for (int i = 0; i < values.length; i++) {
                                    result[i] = values[i].getDecimal();
                                }
                                results.put(source, result);
                            } else {
                                results.put(source, property.getDecimal());
                            }
                            break;
                        case PropertyType.REFERENCE:
                            if (property.isMultiple()) {
                                final Value[] values = property.getValues();
                                final String[] result =
                                        new String[values.length];
                                for (int i = 0; i < values.length; i++) {
                                    result[i] = values[i].getString();
                                }
                                results.put(source, result);
                            } else {
                                results.put(source,
                                        property.getNode().getIdentifier());
                            }
                            break;
                        default:
                            break;
                    }
                }
            }
            session.logout();
        } catch (RepositoryException e) {
            e.printStackTrace();
        }
        manager.completeWorkItem(item.getId(), item.getResults());
    }

    @Override
    public void abortWorkItem(final WorkItem item,
                              final WorkItemManager manager) {
        manager.abortWorkItem(item.getId());
    }
}




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