com.avaje.ebeaninternal.server.persist.dmlbind.BindableIdEmbedded Maven / Gradle / Ivy

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/**
 * Copyright (C) 2006  Robin Bygrave
 * 
 * This file is part of Ebean.
 * 
 * Ebean is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *  
 * Ebean is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with Ebean; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA  
 */
package com.avaje.ebeaninternal.server.persist.dmlbind;

import java.sql.SQLException;
import java.util.Arrays;
import java.util.List;

import javax.persistence.PersistenceException;

import com.avaje.ebeaninternal.server.core.PersistRequestBean;
import com.avaje.ebeaninternal.server.deploy.BeanDescriptor;
import com.avaje.ebeaninternal.server.deploy.BeanProperty;
import com.avaje.ebeaninternal.server.deploy.BeanPropertyAssocOne;
import com.avaje.ebeaninternal.server.persist.dml.GenerateDmlRequest;

/**
 * Bindable for a EmbeddedId.
 */
public class BindableIdEmbedded implements BindableId {

    private final BeanPropertyAssocOne embId;

    private final BeanProperty[] props;

    private final MatchedImportedProperty[] matches;

    public BindableIdEmbedded(BeanPropertyAssocOne embId, BeanDescriptor desc) {
        this.embId = embId;
        this.props = embId.getTargetDescriptor().propertiesBaseScalar();
        matches = MatchedImportedProperty.build(props, desc);
    }

    public boolean isConcatenated() {
        return true;
    }

    public String getIdentityColumn() {
        // return null for concatenated keys
        return null;
    }

    @Override
    public String toString() {
        return embId + " props:" + Arrays.toString(props);
    }

    /**
     * Does nothing for BindableId.
     */
    public void addChanged(PersistRequestBean request, List list) {
        // do nothing (id not changing)
    }

    public void dmlBind(BindableRequest request, boolean checkIncludes, Object bean) throws SQLException {
        dmlBind(request, checkIncludes, bean, true);
    }
    
    public void dmlBindWhere(BindableRequest request, boolean checkIncludes, Object bean) throws SQLException {
        dmlBind(request, checkIncludes, bean, false);
    }
    
    private void dmlBind(BindableRequest bindRequest, boolean checkIncludes, Object bean, boolean bindNull)
            throws SQLException {

        if (checkIncludes && !bindRequest.isIncluded(embId)) {
            return;
        }

        Object idValue = embId.getValue(bean);

        for (int i = 0; i < props.length; i++) {

            Object value = props[i].getValue(idValue);
            bindRequest.bind(value, props[i], props[i].getDbColumn(), bindNull);
        }

        bindRequest.setIdValue(idValue);
    }

    /**
     * Id values are never null in where clause.
     */
    public void dmlWhere(GenerateDmlRequest request, boolean checkIncludes, Object bean) {
        if (checkIncludes && !request.isIncluded(embId)) {
            return;
        }
        dmlAppend(request, false);
    }

    public void dmlInsert(GenerateDmlRequest request, boolean checkIncludes) {
        dmlAppend(request, checkIncludes);
    }

    public void dmlAppend(GenerateDmlRequest request, boolean checkIncludes) {
        if (checkIncludes && !request.isIncluded(embId)) {
            return;
        }
        for (int i = 0; i < props.length; i++) {
            request.appendColumn(props[i].getDbColumn());
        }
    }

    public boolean deriveConcatenatedId(PersistRequestBean persist) {

        if (matches == null) {
            String m = "Matches for the concatinated key columns where not found?"
                    + " I expect that the concatinated key was null, and this bean does"
                    + " not have ManyToOne assoc beans matching the primary key columns?";
            throw new PersistenceException(m);
        }

        Object bean = persist.getBean();

        // create the new id
        Object newId = embId.createEmbeddedId();

        // populate it from the assoc one id values...
        for (int i = 0; i < matches.length; i++) {
            matches[i].populate(bean, newId);
        }

        // support PropertyChangeSupport
        embId.setValueIntercept(bean, newId);
        return true;
    }

}