DictionaryItemValidators.java

/**
 * ***************************************************************************
 * Copyright (c) 2010 Qcadoo Limited
 * Project: Qcadoo Framework
 * Version: 1.4
 *
 * This file is part of Qcadoo.
 *
 * Qcadoo is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published
 * by the Free Software Foundation; either version 3 of the License,
 * or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 * ***************************************************************************
 */
package com.qcadoo.model.internal.dictionaries.hooks;

import java.util.Objects;

import org.springframework.stereotype.Service;

import com.qcadoo.model.api.DataDefinition;
import com.qcadoo.model.api.Entity;
import com.qcadoo.model.api.search.SearchCriteriaBuilder;
import com.qcadoo.model.api.search.SearchRestrictions;
import com.qcadoo.model.api.search.SearchResult;
import com.qcadoo.model.constants.DictionaryItemFields;

@Service
public class DictionaryItemValidators {

    public boolean onValidate(final DataDefinition dictionaryItemDD, final Entity dictionaryItem) {
        boolean isValid = true;

        isValid = checkIfIsUnique(dictionaryItemDD, dictionaryItem) && isValid;
        isValid = disallowNameChange(dictionaryItemDD, dictionaryItem) && isValid;

        return isValid;
    }

    private boolean checkIfIsUnique(final DataDefinition dictionaryItemDD, final Entity dictionaryItem) {
        if (!checkIfDictionaryItemIsUnique(dictionaryItemDD, dictionaryItem)) {
            dictionaryItem.addError(dictionaryItemDD.getField(DictionaryItemFields.NAME),
                    "qcadooView.validate.field.error.duplicated");

            return false;
        }

        return true;
    }

    private boolean checkIfDictionaryItemIsUnique(final DataDefinition dictionaryItemDD, final Entity dictionaryItem) {
        Entity dictionary = dictionaryItem.getBelongsToField(DictionaryItemFields.DICTIONARY);
        String name = dictionaryItem.getStringField(DictionaryItemFields.NAME);

        SearchCriteriaBuilder searchCriteriaBuilder = dictionaryItemDD.find()
                .add(SearchRestrictions.belongsTo(DictionaryItemFields.DICTIONARY, dictionary))
                .add(SearchRestrictions.eq(DictionaryItemFields.NAME, name));

        if (dictionaryItem.getId() != null) {
            searchCriteriaBuilder.add(SearchRestrictions.idNe(dictionaryItem.getId()));
        }

        SearchResult searchResult = searchCriteriaBuilder.list();

        return searchResult.getEntities().isEmpty();
    }

    private boolean disallowNameChange(final DataDefinition dictionaryItemDD, final Entity dictionaryItem) {
        if (dictionaryItem.getId() != null) {
            Entity existingEntity = dictionaryItemDD.get(dictionaryItem.getId());

            if (!Objects.equals(dictionaryItem.getStringField(DictionaryItemFields.NAME),
                    existingEntity.getStringField(DictionaryItemFields.NAME))) {
                dictionaryItem.addError(dictionaryItemDD.getField(DictionaryItemFields.NAME),
                        "qcadooDictionaries.dictionaryItem.validateError.nameChange");
                return false;
            }
        }

        return true;
    }

}