How to use org.eclipse.jdt.ui.jarpackager

/**
 * Gets the manifest provider for this JAR package.
 *
 * @return the IManifestProvider
 */
public IManifestProvider getManifestProvider() {
  if (fManifestProvider == null)
    return getJarBuilder().getManifestProvider();
  return fManifestProvider;
}

@Override
public void close() throws CoreException {
  if (fJarWriter != null) {
    fJarWriter.close();
  }
}

protected boolean canBeExported(boolean hasErrors, boolean hasWarnings) throws CoreException {
  return (!hasErrors && !hasWarnings)
    || (hasErrors && fJarPackage.areErrorsExported())
    || (hasWarnings && fJarPackage.exportWarnings());
}

  private boolean mustUseSourceFolderHierarchy() {
    return fJarPackage.useSourceFolderHierarchy() && fJarPackage.areJavaFilesExported() && !fJarPackage.areGeneratedFilesExported();
  }
}

/**
 * Sets whether a previously generated manifest should be reused.
 *
 * @param state the new state
 */
public void setReuseManifest(boolean state) {
  fReuseManifest= state;
  if (fReuseManifest)
    // manifest must be saved in order to be reused
    setSaveManifest(true);
}

/**
 * Returns the elements which will be exported.
 * These elements are leaf objects e.g. <code>IFile</code>
 * and not containers.
 *
 * @return an array of leaf objects
 */
public Object[] getElements() {
  if (fElements == null)
    setElements(new Object[0]);
  return fElements;
}

/**
 * Sets whether the manifest file must be saved during export
 * operation or not.
 *
 * @param state the new state
 * @see #getManifestLocation()
 */
public void setSaveManifest(boolean state) {
  fSaveManifest= state;
  if (!fSaveManifest)
    // can't reuse manifest if it is not saved
    setReuseManifest(false);
}

/**
 * Returns the jar builder which can be used to build the jar
 * described by this package data.
 *
 * @return the builder to use
 * @since 3.4
 */
public IJarBuilder getJarBuilder() {
  if (fJarBuilder == null)
    fJarBuilder= createPlainJarBuilder();
  return fJarBuilder;
}

  private boolean mustUseSourceFolderHierarchy() {
    return fJarPackage.useSourceFolderHierarchy() && fJarPackage.areJavaFilesExported() && !fJarPackage.areGeneratedFilesExported();
  }
}

private boolean canBeExported(boolean hasErrors, boolean hasWarnings) {
  return (!hasErrors && !hasWarnings)
    || (hasErrors && fJarPackage.areErrorsExported())
    || (hasWarnings && fJarPackage.exportWarnings());
}

/**
 * Sets whether a previously generated manifest should be reused.
 * 
 * @param state the new state
 */
public void setReuseManifest(boolean state) {
  fReuseManifest= state;
  if (fReuseManifest)
    // manifest must be saved in order to be reused
    setSaveManifest(true);
}

/**
 * Returns the elements which will be exported.
 * These elements are leaf objects e.g. <code>IFile</code>
 * and not containers.
 *
 * @return an array of leaf objects
 */
public Object[] getElements() {
  if (fElements == null)
    setElements(new Object[0]);
  return fElements;
}

/**
 * Gets the manifest provider for this JAR package.
 *
 * @return the IManifestProvider
 */
public IManifestProvider getManifestProvider() {
  if (fManifestProvider == null)
    return getJarBuilder().getManifestProvider();
  return fManifestProvider;
}

@Override
public void close() throws CoreException {
  if (fJarWriter != null) {
    fJarWriter.close();
  }
}

/**
 * Returns the jar builder which can be used to build the jar
 * described by this package data.
 *
 * @return the builder to use
 * @since 3.4
 */
public IJarBuilder getJarBuilder() {
  if (fJarBuilder == null)
    fJarBuilder= createPlainJarBuilder();
  return fJarBuilder;
}

  private boolean mustUseSourceFolderHierarchy() {
    return fJarPackage.useSourceFolderHierarchy() && fJarPackage.areJavaFilesExported() && !fJarPackage.areGeneratedFilesExported();
  }
}

private boolean canBeExported(boolean hasErrors, boolean hasWarnings) {
  return (!hasErrors && !hasWarnings)
    || (hasErrors && fJarPackage.areErrorsExported())
    || (hasWarnings && fJarPackage.exportWarnings());
}

/**
 * Sets whether a previously generated manifest should be reused.
 *
 * @param state the new state
 */
public void setReuseManifest(boolean state) {
  fReuseManifest= state;
  if (fReuseManifest)
    // manifest must be saved in order to be reused
    setSaveManifest(true);
}

/**
 * Returns the elements which will be exported.
 * These elements are leaf objects e.g. <code>IFile</code>
 * and not containers.
 * 
 * @return an array of leaf objects
 */
public Object[] getElements() {
  if (fElements == null)
    setElements(new Object[0]);
  return fElements;
}

private boolean canBeExported(boolean hasErrors, boolean hasWarnings) throws CoreException {
  return (!hasErrors && !hasWarnings)
    || (hasErrors && fJarPackage.areErrorsExported())
    || (hasWarnings && fJarPackage.exportWarnings());
}