Class DOMConfigNode

solr/core/src/java/org/apache/solr/util/DOMConfigNode.java:30–85

Read using DOM

/** Read using DOM */
public class DOMConfigNode implements ConfigNode {

  private final Node node;
  private Map<String, String> attrs; // lazy populated

  public DOMConfigNode(Node node) {
    this.node = node;
  }

  @Override
  public String name() {
    return node.getNodeName();
  }

  @Override
  public String txt() {
    return DOMUtil.getText(node);
  }

  @Override
  public Map<String, String> attributes() {
    if (attrs != null) return attrs;
    Map<String, String> attrs = DOMUtil.toMap(node.getAttributes());
    return this.attrs = attrs.isEmpty() ? Map.of() : attrs;
  }

  @Override
  public ConfigNode child(String name) {
    Node n = DOMUtil.getChild(node, name);
    return n == null ? null : new DOMConfigNode(n);
  }

  @Override
  public List<ConfigNode> getAll(String name) {
    List<ConfigNode> result = new ArrayList<>();
    forEachChild(
        it -> {
          if (name.equals(it.name())) {
            result.add(it);
          }
          return Boolean.TRUE;
        });
    return result;
  }

  @Override
  public void forEachChild(Function<ConfigNode, Boolean> fun) {
    NodeList nlst = node.getChildNodes();
    for (int i = 0; i < nlst.getLength(); i++) {
      Node item = nlst.item(i);
      if (item.getNodeType() != Node.ELEMENT_NODE) continue;
      Boolean toContinue = fun.apply(new DOMConfigNode(item));
      if (Boolean.FALSE.equals(toContinue)) break;
    }
  }
}