Android Open Source - colibri Node Context

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License

The source code is released under:

Apache License

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Java Source Code

package labrom.colibri.xml;
/*from  w w  w  .  ja v a 2 s  . c om*/
import java.io.IOException;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

/**
 * Base abstract class for all XML nodes contexts.
 * 
 * Use {@linkplain RootContext} to start defining XML contexts.
 * 
 * @author Romain Laboisse labrom@gmail.com
 *
 * @param <T> The type of objects that Pulloid will create. This class must be written by developers.
 */
public abstract class NodeContext<T> {
  
  ElementContext<T> parent;
  NodeContext<T> nextSibling;
  String name;
  StringTransformer<?> transformer;
  FieldSetter<T> setter;


  
  protected NodeContext(ElementContext<T> parent, String name) {
    this.parent = parent;
    this.name = name;
  }
  

  public void setStringTransformer(StringTransformer<?> tr) {
    this.transformer = tr;
  }
  
  void registerField(String name) {
    registerField(name, null, null);
  }
  
  void registerField(String name, Class<?> type) {
    registerField(name, type, null);
  }
  
  /**
   * Registers a field with a {@link StringTransformer}.
   * @param <TT>
   * @param name
   * @param type The type of the field to set. If the {@link StringTransformer} is not null then the type must be specified too
   * and type parameters must be the same.
   * @param tr A string transformer. If not null, the {@code type} parameter must be non-null too.
   */
  protected <TT> void registerField(String name, Class<TT> type, StringTransformer<TT> tr) {
    CursorDef<T> cursorDef = findCursorDef();
    if(cursorDef == null)
      throw new CursorException("Operation not allowed in this context, a cursor must be defined before fields are registered");
    if(tr != null && type == null)
      throw new CursorException("A string transformer was passed but no associated target type");
    this.setter = new FieldSetter<T>(cursorDef.cursorType, name, type);
    this.transformer = tr;
  }
  
  protected void registerField(String name, Class<?> type, StringTransformer<?> tr, FieldSetter<T> setter) {
    CursorDef<T> cursorDef = findCursorDef();
    if(cursorDef == null)
      throw new CursorException("Operation not allowed in this context, a cursor must be defined before fields are registered");
    this.setter = setter;
    this.transformer = tr;
  }

  CursorDef<T> findCursorDef() {
    if(parent != null)
      return parent.findCursorDef();
    return null;
  }


  abstract void hydrate(XmlPullParser p, Reflector<T> record) throws XmlPullParserException, IOException;

  
}

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