MultipleSubFormFieldValueProcessor.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.dynamic.impl.fieldProcessors;

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

import org.kie.workbench.common.forms.dynamic.service.context.generation.dynamic.BackendFormRenderingContext;
import org.kie.workbench.common.forms.dynamic.service.shared.impl.MapModelRenderingContext;
import org.kie.workbench.common.forms.fields.shared.fieldTypes.relations.multipleSubform.definition.MultipleSubFormFieldDefinition;
import org.kie.workbench.common.forms.model.FormDefinition;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Dependent
public class MultipleSubFormFieldValueProcessor extends NestedFormFieldValueProcessor<MultipleSubFormFieldDefinition, List, List<Map<String, Object>>> {

    private static final Logger logger = LoggerFactory.getLogger(MultipleSubFormFieldValueProcessor.class);

    @Override
    public Class<MultipleSubFormFieldDefinition> getSupportedField() {
        return MultipleSubFormFieldDefinition.class;
    }

    @Override
    public List<Map<String, Object>> toFlatValue(MultipleSubFormFieldDefinition field,
                                                 List rawValues,
                                                 BackendFormRenderingContext context) {

        final FormDefinition creationForm = context.getRenderingContext().getAvailableForms().get(
                field.getCreationForm());

        final FormDefinition editionForm = context.getRenderingContext().getAvailableForms().get(
                field.getEditionForm());

        final List<Map<String, Object>> nestedRawValues = new ArrayList<>();

        if (rawValues != null) {
            rawValues.forEach(nestedValue -> {
                Map<String, Object> nestedRawValue = new HashMap<>();

                nestedRawValues.add(nestedRawValue);

                prepareNestedRawValues(nestedRawValue,
                                       creationForm,
                                       nestedValue);

                prepareNestedRawValues(nestedRawValue,
                                       editionForm,
                                       nestedValue);
            });
        }

        List<Map<String, Object>> nestedFormValues = new ArrayList<>();

        nestedRawValues.forEach(rawValue -> {
            Map<String, Object> formValue = processor.readFormValues(creationForm,
                                                                     rawValue,
                                                                     context);

            formValue.putAll(processor.readFormValues(editionForm,
                                                      rawValue,
                                                      context));

            formValue.put(MapModelRenderingContext.FORM_ENGINE_OBJECT_IDX,
                          nestedFormValues.size());

            formValue.put(MapModelRenderingContext.FORM_ENGINE_EDITED_OBJECT,
                          Boolean.FALSE);

            nestedFormValues.add(formValue);
        });

        return nestedFormValues;
    }

    @Override
    public List toRawValue(MultipleSubFormFieldDefinition field,
                           List<Map<String, Object>> flatValues,
                           List originalValues,
                           BackendFormRenderingContext context) {

        final List originalObjects = originalValues != null ? originalValues : new ArrayList<>();

        List fieldValue = new ArrayList();

        flatValues.forEach(nestedObjectValues -> {
            if (nestedObjectValues.containsKey(MapModelRenderingContext.FORM_ENGINE_OBJECT_IDX)) {
                int originalPosition = (Integer) nestedObjectValues.get(MapModelRenderingContext.FORM_ENGINE_OBJECT_IDX);
                boolean edited = Boolean.TRUE.equals(nestedObjectValues.get(MapModelRenderingContext.FORM_ENGINE_EDITED_OBJECT));

                if (originalPosition < originalObjects.size()) {
                    Object originalObject = originalObjects.get(originalPosition);
                    if (edited) {
                        originalObject = writeObjectValues(originalObject,
                                                           nestedObjectValues,
                                                           field,
                                                           context);
                    }
                    fieldValue.add(originalObject);
                }
            } else {
                fieldValue.add(writeObjectValues(null,
                                                 nestedObjectValues,
                                                 field,
                                                 context));
            }
        });
        return fieldValue;
    }

    @Override
    public Logger getLogger() {
        return logger;
    }
}