FormValuesProcessorImpl.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;

import java.util.HashMap;
import java.util.Map;
import javax.enterprise.context.Dependent;
import javax.enterprise.inject.Instance;
import javax.inject.Inject;

import org.kie.workbench.common.forms.dynamic.backend.server.context.generation.dynamic.impl.fieldProcessors.NestedFormFieldValueProcessor;
import org.kie.workbench.common.forms.dynamic.service.context.generation.dynamic.BackendFormRenderingContext;
import org.kie.workbench.common.forms.dynamic.service.context.generation.dynamic.FieldValueProcessor;
import org.kie.workbench.common.forms.dynamic.service.context.generation.dynamic.FormValuesProcessor;
import org.kie.workbench.common.forms.model.FieldDefinition;
import org.kie.workbench.common.forms.model.FormDefinition;

@Dependent
public class FormValuesProcessorImpl implements FormValuesProcessor {

    protected Map<Class<? extends FieldDefinition>, FieldValueProcessor> fieldValueProcessors = new HashMap<>();

    @Inject
    public FormValuesProcessorImpl(Instance<FieldValueProcessor<? extends FieldDefinition, ?, ?>> installedProcessors) {
        for (FieldValueProcessor processor : installedProcessors) {
            if (processor instanceof NestedFormFieldValueProcessor) {
                ((NestedFormFieldValueProcessor) processor).init(this);
            }
            fieldValueProcessors.put(processor.getSupportedField(),
                                     processor);
        }
    }

    @Override
    public Map<String, Object> readFormValues(FormDefinition form,
                                              Map<String, Object> rawValues,
                                              BackendFormRenderingContext context) {
        final Map<String, Object> result = new HashMap<>();

        rawValues.forEach((String key, final Object value) -> {

            FieldDefinition field = form.getFieldByBinding(key);

            Object fieldValue = value;

            if (field != null) {
                if (value != null) {
                    FieldValueProcessor processor = fieldValueProcessors.get(field.getClass());

                    if (processor != null) {
                        fieldValue = processor.toFlatValue(field,
                                                           value,
                                                           context);
                    }
                }
                result.put(key,
                           fieldValue);
            }
        });

        return result;
    }

    @Override
    public Map<String, Object> writeFormValues(FormDefinition form,
                                               Map<String, Object> formValues,
                                               Map<String, Object> rawValues,
                                               BackendFormRenderingContext context) {

        final Map<String, Object> result = new HashMap<>();

        formValues.forEach((key, value) -> {

            FieldDefinition field = form.getFieldByBinding(key);

            if (field != null) {
                if (value != null) {
                    FieldValueProcessor processor = fieldValueProcessors.get(field.getClass());

                    if (processor != null) {
                        value = processor.toRawValue(field,
                                                     value,
                                                     rawValues.get(key),
                                                     context);
                    }
                }
            }

            result.put(key,
                       value);
        });

        return result;
    }
}