EnumSelectorFieldInitializer.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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.kie.workbench.common.forms.dynamic.backend.server.context.generation.statik.impl.fieldInitializers;

import java.util.ArrayList;
import java.util.List;
import javax.enterprise.context.Dependent;

import org.kie.workbench.common.forms.dynamic.backend.server.context.generation.statik.impl.DMOBasedTransformerContext;
import org.kie.workbench.common.forms.dynamic.backend.server.context.generation.statik.impl.FieldSetting;
import org.kie.workbench.common.forms.fields.shared.fieldTypes.basic.selectors.DefaultSelectorOption;
import org.kie.workbench.common.forms.fields.shared.fieldTypes.basic.selectors.SelectorFieldBaseDefinition;
import org.kie.workbench.common.forms.model.FieldDefinition;

@Dependent
public class EnumSelectorFieldInitializer implements FieldInitializer<SelectorFieldBaseDefinition> {

    @Override
    public boolean supports(FieldDefinition field) {
        return field instanceof SelectorFieldBaseDefinition && field.getFieldTypeInfo().isEnum();
    }

    @Override
    public void initializeField(SelectorFieldBaseDefinition field,
                                FieldSetting setting,
                                DMOBasedTransformerContext context) {

        try {
            Enum[] enumValues = (Enum[]) Class.forName(setting.getType()).getEnumConstants();

            if (enumValues != null && (field.getOptions() == null || field.getOptions().isEmpty())) {
                List<DefaultSelectorOption<Enum>> options = new ArrayList<>();
                for (Enum enumConstant : enumValues) {
                    DefaultSelectorOption<Enum> selectorOption = new DefaultSelectorOption<>(
                            enumConstant,
                            enumConstant.toString(),
                            false);

                    options.add(selectorOption);
                }
                field.setOptions(options);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}