net.jangaroo.jooc.mxml.ComponentPackageManifestParser Maven / Gradle / Ivy

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package net.jangaroo.jooc.mxml;

import net.jangaroo.jooc.util.PreserveLineNumberHandler;
import net.jangaroo.utils.CompilerUtils;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.io.IOException;
import java.io.InputStream;

public class ComponentPackageManifestParser {

  private String namespace;

  public ComponentPackageManifestParser(String namespace) {
    this.namespace = namespace;
  }

  public ComponentPackageModel parse(InputStream manifestInputStream) throws IOException {
    ComponentPackageModel componentPackageModel = new ComponentPackageModel(namespace);
    try {
      Document document = buildDom(manifestInputStream);
      NodeList componentNodes = document.getElementsByTagName("component");
      for (int i = 0; i < componentNodes.getLength(); i++) {
        Node componentNode = componentNodes.item(i);
        NamedNodeMap attributes = componentNode.getAttributes();
        Node classAttribute = attributes.getNamedItem("class");
        if (classAttribute == null) {
          System.err.println("[WARN] manifest.xml contains  element without 'class' attribute.");
        } else {
          String componentClass = classAttribute.getNodeValue();
          Node idAttribute = attributes.getNamedItem("id");
          String componentId = idAttribute != null
                  ? idAttribute.getNodeValue()
                  : CompilerUtils.className(componentClass);
          componentPackageModel.addElementToClassNameMapping(componentId, componentClass);
        }
      }
    } catch (SAXException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }

    return componentPackageModel;
  }

  private Document buildDom(InputStream inputStream) throws SAXException, IOException {
    SAXParser parser;
    final Document doc;
    try {
      final SAXParserFactory saxFactory = SAXParserFactory.newInstance();
      saxFactory.setNamespaceAware(true);
      parser = saxFactory.newSAXParser();
      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
      doc = factory.newDocumentBuilder().newDocument();
    } catch (ParserConfigurationException e) {
      throw new IllegalStateException("a default dom builder should be provided", e);
    }
    PreserveLineNumberHandler handler = new PreserveLineNumberHandler(doc);
    parser.parse(inputStream, handler);
    return doc;
  }
}