io.ebeaninternal.dbmigration.migrationreader.MigrationXmlReader Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ebean Show documentation

composite of common runtime dependencies for all platforms

There is a newer version: 15.8.1

package io.ebeaninternal.dbmigration.migrationreader;


import io.ebeaninternal.dbmigration.migration.Migration;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * Reads a migration xml document returning the Migration.
 */
public class MigrationXmlReader {

  private MigrationXmlReader() {
  }

  /**
   * Read and return a Migration from an xml document at the given resource path.
   */
  public static Migration read(String resourcePath) {

    try (InputStream is = MigrationXmlReader.class.getResourceAsStream(resourcePath)) {
      if (is == null) {
        throw new IllegalArgumentException("No resource found for path [" + resourcePath + "]");
      }
      return read(is);
    } catch (IOException e) {
      throw new IllegalArgumentException("Failed to auto close resource " + resourcePath, e);
    }
  }

  /**
   * Read and return a Migration from a migration xml file.
   */
  public static Migration read(File migrationFile) {

    try (FileInputStream is = new FileInputStream(migrationFile)) {
      return read(is);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * Read and return a Migration from an xml document.
   */
  public static Migration read(InputStream is) {

    try {
      JAXBContext jaxbContext = JAXBContext.newInstance(Migration.class);
      Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
      return (Migration) unmarshaller.unmarshal(is);

    } catch (JAXBException e) {
      throw new RuntimeException(e);
    }
  }

}