ParseDmnModelRule.java

/* 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.camunda.bpm.model.dmn.util;

import java.io.InputStream;

import org.camunda.bpm.model.dmn.Dmn;
import org.camunda.bpm.model.dmn.DmnModelInstance;
import org.camunda.bpm.model.xml.impl.util.IoUtil;
import org.junit.rules.TestWatcher;
import org.junit.runner.Description;

public class ParseDmnModelRule extends TestWatcher {

  protected DmnModelInstance dmnModelInstance;

  @Override
  protected void starting(Description description) {

    DmnModelResource dmnModelResource = description.getAnnotation(DmnModelResource.class);

    if(dmnModelResource != null) {

      String resourcePath = dmnModelResource.resource();

      if (resourcePath.isEmpty()) {
        Class<?> testClass = description.getTestClass();
        String methodName = description.getMethodName();

        String resourceFolderName = testClass.getName().replaceAll("\\.", "/");
        resourcePath = resourceFolderName + "." + methodName + ".dmn";
      }

      InputStream resourceAsStream = getClass().getClassLoader().getResourceAsStream(resourcePath);
      try {
        dmnModelInstance = Dmn.readModelFromStream(resourceAsStream);
      } finally {
        IoUtil.closeSilently(resourceAsStream);
      }

    }

  }

  public DmnModelInstance getDmnModel() {
    return dmnModelInstance;
  }

}