Android Open Source - jpdroid Jpdroid Xml Converter

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License

The source code is released under:
GNU General Public License
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Java Source Code

package br.com.rafael.jpdroid.converters;
/*from  w  ww.  ja va2 s  .c om*/
import java.io.StringWriter;
import java.lang.reflect.Field;
import java.util.List;

import org.xmlpull.v1.XmlSerializer;

import android.database.Cursor;
import android.util.Xml;
import br.com.rafael.jpdroid.annotations.Column;
import br.com.rafael.jpdroid.annotations.Entity;
import br.com.rafael.jpdroid.annotations.RelationClass;

/**
 * Classe respons?vel pela convers?o objetos para o formato XML.
 * 
 * @author Rafael Centenaro
 */
public class JpdroidXmlConverter {
  private static XmlSerializer xmlSerializer = null;
  private static StringWriter writer = null;

  public static String toXml(Cursor cursor) throws Exception {
    createDocument(cursor);
    return writer.toString();
  }

  public static String toXml(Object entity) throws Exception {
    createDocument(entity);
    return writer.toString();
  }

  private static void createDocument(Object entity) throws Exception {
    xmlSerializer = Xml.newSerializer();
    writer = new StringWriter();

    xmlSerializer.setOutput(writer);
    // start DOCUMENT
    xmlSerializer.startDocument("UTF-8", true);

    createElement(entity);

    // end DOCUMENT
    xmlSerializer.endDocument();

  }

  private static void createDocument(Cursor cursor) throws Exception {
    xmlSerializer = Xml.newSerializer();
    writer = new StringWriter();

    xmlSerializer.setOutput(writer);
    // start DOCUMENT
    xmlSerializer.startDocument("UTF-8", true);

    createElement(cursor);

    // end DOCUMENT
    xmlSerializer.endDocument();

  }

  public static void createElement(Cursor cursor) throws Exception {
    cursor.moveToFirst();
    if (cursor.getCount() > 1) {
      xmlSerializer.startTag("", "Cursor");
    }
    while (cursor.isAfterLast() == false) {
      xmlSerializer.startTag("", "Registro");

      int totalColumn = cursor.getColumnCount();

      for (int i = 0; i < totalColumn; i++) {
        if (cursor.getColumnName(i) != null) {
          String value = "";
          if (cursor.getString(i) != null) {
            value = cursor.getString(i);
          }
          xmlSerializer.startTag("", cursor.getColumnName(i));
          xmlSerializer.text(value);
          xmlSerializer.endTag("", cursor.getColumnName(i));
        }
      }
      xmlSerializer.endTag("", "Registro");
      cursor.moveToNext();
    }
    if (cursor.getCount() > 1) {
      xmlSerializer.endTag("", "Cursor");
    }

  }

  public static void createElement(Object entity) throws Exception {
    Object[] element = null;

    if (entity instanceof List) {
      element = ((List<?>) entity).toArray(new Object[((List<?>) entity).size()]);
      if (element.length > 1) {
        xmlSerializer.startTag("", "List_" + element[0].getClass().getSimpleName());
      }
    } else {
      element = new Object[1];
      element[0] = entity;
    }

    for (Object item : element) {
      Class<?> classe = item.getClass();

      xmlSerializer.startTag("", classe.getSimpleName());

      Field[] declaredFields = classe.getDeclaredFields();
      //Collections.reverse(Arrays.asList(declaredFields));
      for (Field field : declaredFields) {
        Column column = field.getAnnotation(Column.class);
        RelationClass relationClass = field.getAnnotation(RelationClass.class);
        if (column != null || relationClass != null) {
          field.setAccessible(true);
          Object child = field.get(item);
          if (child != null) {
            if (child instanceof List || child.getClass().getAnnotation(Entity.class) != null) {

              createElement(child);
            } else {
              // open tag: <topic>
              xmlSerializer.startTag("", field.getName());
              xmlSerializer.text(child.toString());
              // close tag: </topic>
              xmlSerializer.endTag("", field.getName());
            }
          }
        }
      }

      // close tag: </record>
      xmlSerializer.endTag("", classe.getSimpleName());

    }
    if (element.length > 1) {
      xmlSerializer.endTag("", "List_" + element[0].getClass().getSimpleName());
    }

  }

}
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