AbstractSelectorDataProviderManager.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.service.shared;

import java.util.HashMap;
import java.util.Map;

import org.kie.workbench.common.forms.dynamic.model.config.SelectorData;
import org.kie.workbench.common.forms.dynamic.model.config.SelectorDataProvider;
import org.kie.workbench.common.forms.dynamic.model.config.SystemSelectorDataProvider;

public abstract class AbstractSelectorDataProviderManager implements SelectorDataProviderManager {

    protected Map<String, SelectorDataProvider> providers = new HashMap<>();

    protected void registerProvider(SelectorDataProvider provider) {
        providers.put(getPreffix() + SEPARATOR + provider.getClass().getName(),
                      provider);
    }

    @Override
    public Map<String, String> availableProviders() {
        Map<String, String> result = new HashMap<>();

        for (String key : providers.keySet()) {
            SelectorDataProvider provider = providers.get(key);
            if (!(provider instanceof SystemSelectorDataProvider)) {
                result.put(key,
                           provider.getProviderName());
            }
        }
        return result;
    }

    @Override
    public SelectorData getDataFromProvider(FormRenderingContext context,
                                            String provider) {

        SelectorDataProvider dataProvider = providers.get(provider);

        if (dataProvider == null) {
            return null;
        }

        return dataProvider.getSelectorData(context);
    }

    public abstract String getPreffix();
}