columnhelper.java

dorado 展现中间件是一款企业级的商用AJAX平台软件

package sample.skills.table.test;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.bstek.dorado.utils.StringHelper;
import com.bstek.dorado.utils.xml.XmlBuilder;
import com.bstek.dorado.utils.xml.XmlDocument;
import com.bstek.dorado.utils.xml.XmlFactory;
import com.bstek.dorado.utils.xml.XmlNode;
import com.bstek.dorado.utils.xml.XmlParseException;

public class ColumnHelper {

  public static Map getColumnInfos()
      throws XmlParseException,
      IOException {
    Map map = new HashMap();
    String resource = "TableEvents.view.xml";
    String controlId = "tableEmployee";
    try {
      InputStream in = ColumnHelper.class.getResourceAsStream(resource);
      if (in != null) {
        try {
          XmlBuilder builder = XmlFactory.createXmlBuilder();
          XmlDocument doc = builder.buildDocument(in);
          XmlNode tableNode = doc.getNodeById(controlId);

          XmlNode[] columnNodes = tableNode.getNodesByXPath("Column");
          for (int i = 0; i < columnNodes.length; i++) {
            String columnName = columnNodes[i].getAttribute("name");
            String label = getLabel(doc, columnNodes[i]);
            Map scripts = getScripts(columnNodes[i]);

            List list = new ArrayList();
            list.add(columnName);
            list.add(label);
            list.add(scripts);

            map.put(columnName, list);
          }
        }
        finally {
          in.close();
        }
      }
    }
    catch (FileNotFoundException e) {
      e.printStackTrace();
    }
    catch (IOException e) {
      e.printStackTrace();
    }

    return map;
  }

  private static String getLabel(XmlDocument doc, XmlNode columnNode) {
    String datasetId = columnNode.getParent().getAttribute("dataset");
    XmlNode datasetNode = doc.getNodeById(datasetId);

    String label = columnNode.getAttribute("label");
    if (StringHelper.isEmpty(label)) {
      String fieldName = columnNode.getAttribute("field");
      XmlNode fieldNode = getFieldNode(datasetNode, fieldName);
      if (fieldNode != null) {
        label = fieldNode.getAttribute("label");
      }
    }
    return label;
  }

  private static Map getScripts(XmlNode columnNode) {
    Map map = new HashMap();
    XmlNode eventsNode = columnNode.getChild("Events");
    if (eventsNode != null) {
      XmlNode[] eventNodes = eventsNode.getChildren();
      for (int i = 0; i < eventNodes.length; i++) {
        XmlNode eventNode = eventNodes[i];
        String eventName = eventNode.getAttribute("name");
        String script = eventNode.getContent();
        if (StringHelper.isNotEmpty(script)) {
          map.put(eventName, script);
        }
      }
    }
    return map;
  }

  private static XmlNode getFieldNode(XmlNode datasetNode, String fieldName) {
    XmlNode node = null;
    XmlNode fieldsNode = datasetNode.getChild("Fields");
    if (fieldsNode != null) {
      XmlNode[] fields = fieldsNode.getChildren();
      for (int i = 0; i < fields.length; i++) {
        XmlNode field = fields[i];
        if (field.getAttribute("name").equals(fieldName)) {
          node = field;
          break;
        }
      }
    }
    return node;
  }
}