SelectorFieldRenderer.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.client.rendering.renderers.selectors;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;

import org.jboss.errai.common.client.api.Caller;
import org.jboss.errai.common.client.api.RemoteCallback;
import org.kie.workbench.common.forms.dynamic.client.config.ClientSelectorDataProviderManager;
import org.kie.workbench.common.forms.dynamic.client.rendering.FieldRenderer;
import org.kie.workbench.common.forms.dynamic.model.config.SelectorData;
import org.kie.workbench.common.forms.dynamic.service.shared.BackendSelectorDataProviderService;
import org.kie.workbench.common.forms.dynamic.service.shared.SelectorDataProviderManager;
import org.kie.workbench.common.forms.fields.shared.fieldTypes.basic.selectors.SelectorFieldBaseDefinition;
import org.kie.workbench.common.forms.fields.shared.fieldTypes.basic.selectors.SelectorOption;

public abstract class SelectorFieldRenderer<F extends SelectorFieldBaseDefinition, O extends SelectorOption<T>, T> extends FieldRenderer<F> {

    @Inject
    protected SelectorDataProviderManager clientProviderManager;

    @Inject
    protected Caller<BackendSelectorDataProviderService> backendSelectorDataProviderService;

    public void refreshSelectorOptions() {
        if (field.getDataProvider() != null && !field.getDataProvider().isEmpty()) {
            if (field.getDataProvider().startsWith(ClientSelectorDataProviderManager.PREFFIX)) {
                refreshSelectorOptions(clientProviderManager.getDataFromProvider(
                        renderingContext,
                        field.getDataProvider()));
            } else {
                backendSelectorDataProviderService.call(new RemoteCallback<SelectorData>() {
                    @Override
                    public void callback(SelectorData data) {
                        refreshSelectorOptions(data);
                    }
                }).getDataFromProvider(renderingContext,
                                       field.getDataProvider());
            }
        } else {
            refreshSelectorOptions(field.getOptions());
        }
    }

    public void refreshSelectorOptions(List<O> options) {
        Map<T, String> optionsValues = new HashMap<>();
        T defaultValue = null;

        for (O option : options) {
            optionsValues.put(option.getValue(),
                              option.getText());
            if (option.isDefaultValue()) {
                defaultValue = option.getValue();
            }
        }

        refreshInput(optionsValues,
                     defaultValue);
    }

    public void refreshSelectorOptions(SelectorData<T> data) {
        refreshInput(data.getValues(),
                     data.getSelectedValue());
    }

    protected abstract void refreshInput(Map<T, String> optionsValues,
                                         T defaultValue);
}