/*
* Copyright © 2015-2016 Cask Data, Inc.
*
* 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 co.cask.cdap.internal.app.workflow;
import co.cask.cdap.api.workflow.WorkflowAction;
import co.cask.cdap.api.workflow.WorkflowActionConfigurer;
import co.cask.cdap.api.workflow.WorkflowActionSpecification;
import co.cask.cdap.internal.lang.Reflections;
import co.cask.cdap.internal.specification.DataSetFieldExtractor;
import co.cask.cdap.internal.specification.PropertyFieldExtractor;
import co.cask.cdap.internal.workflow.DefaultWorkflowActionSpecification;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* Default implementation of {@link WorkflowActionConfigurer}.
*/
public class DefaultWorkflowActionConfigurer implements WorkflowActionConfigurer {
private final String className;
private final Map<String, String> propertyFields;
private final Set<String> datasetFields;
private String name;
private String description;
private Map<String, String> properties;
private Set<String> datasets;
private DefaultWorkflowActionConfigurer(WorkflowAction workflowAction) {
this.name = workflowAction.getClass().getSimpleName();
this.description = "";
this.className = workflowAction.getClass().getName();
this.propertyFields = new HashMap<>();
this.datasetFields = new HashSet<>();
this.properties = new HashMap<>();
this.datasets = new HashSet<>();
Reflections.visit(workflowAction, workflowAction.getClass(),
new PropertyFieldExtractor(propertyFields),
new DataSetFieldExtractor(datasetFields));
}
@Override
public void setName(String name) {
Preconditions.checkArgument(!Strings.isNullOrEmpty(name), "Name of the WorkflowAction cannot be null or empty");
this.name = name;
}
@Override
public void setDescription(String description) {
Preconditions.checkNotNull(description, "Description of the WorkflowAction cannot be null");
this.description = description;
}
@Override
public void setProperties(Map<String, String> properties) {
Preconditions.checkNotNull(properties, "Properties of the WorkflowAction cannot be null");
this.properties = new HashMap<>(properties);
}
@Override
public void useDatasets(Iterable<String> datasets) {
Preconditions.checkNotNull(datasets, "Datasets of the WorkflowAction cannot be null");
for (String dataset : datasets) {
this.datasets.add(dataset);
}
}
private DefaultWorkflowActionSpecification createSpecification() {
Map<String, String> properties = new HashMap<>(this.properties);
properties.putAll(propertyFields);
Set<String> datasets = new HashSet<>(this.datasets);
datasets.addAll(datasetFields);
return new DefaultWorkflowActionSpecification(className, name, description, properties, datasets);
}
public static WorkflowActionSpecification configureAction(WorkflowAction action) {
DefaultWorkflowActionConfigurer configurer = new DefaultWorkflowActionConfigurer(action);
action.configure(configurer);
return configurer.createSpecification();
}
}