Java Code Examples for org.jdom.Element#getContentSize()

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Example 1

Source File: UpgradeXGAPP.java From gate-core with GNU Lesser General Public License v3.0

6 votes

/**
 * If this element has any child <em>elements</em>, add whitespace
 * text nodes inside this element to indent its children to the
 * appropriate level, and then do the same recursively for the children.
 * This doesn't work for elements with mixed content - content must be
 * either other elements or text, not both.
 * @param e the element to pretty print
 * @param numAncestors the number of ancestor elements this element
 *                     will have once it is inserted into the tree
 *                     (i.e. the "depth" of this element).
 */
@SuppressWarnings("unchecked")
private static void prettyPrint(Element e, int numAncestors) {
  if(!e.getChildren().isEmpty()) {
    int numChildren = e.getContentSize();
    // add indent before the closing tag
    e.addContent(numChildren, new Text("\n" + StringUtils.repeat(" ", 2*numAncestors)));
    // add a bit more indent before each child - we have to work backwards
    // as the act of adding text nodes changes the content indexes for
    // subsequent children
    String indentStr = "\n" + StringUtils.repeat(" ", 2*(numAncestors+1));
    for(int i = numChildren - 1; i >= 0; i--) {
      e.addContent(i, new Text(indentStr));
    }

    // now recursively prettify the children
    for(Element child : (List<Element>)e.getChildren()) {
      prettyPrint(child, numAncestors + 1);
    }
  }
}