AccessibleTableColumns.java

package atg.adapter.gsa;

import java.lang.reflect.Field;
import java.util.List;

import org.apache.log4j.Logger;

/**
 * This class uses reflection to allow access to private member variables
 * withing a GSA Table class.
 * 
 * @author adamb
 */
public class AccessibleTableColumns {
  public Logger mLogger = Logger.getLogger(this.getClass());
  public TableColumns mTableColumns;

  public AccessibleTableColumns(TableColumns pTable) {
    mTableColumns = pTable;
  }

  // ------------------------
  /**
   * Returns the mHead field of the Table class passed to the constructor of
   * this class.
   * 
   * @return
   */
  public ColumnDefinitionNode getHead() {
    String fieldName = "mHead";
    ColumnDefinitionNode node = (ColumnDefinitionNode) getPrivateField(fieldName);
    return node;
  }

  // ------------------------
  /**
   * Returns the mTail field of the Table class passed to the constructor of
   * this class.
   * 
   * @return
   */
  public ColumnDefinitionNode getTail() {
    String fieldName = "mTail";
    ColumnDefinitionNode node = (ColumnDefinitionNode) getPrivateField(fieldName);
    return node;
  }

  // ------------------------
  /**
   * Returns the mPrimaryKeys field of the Table class passed to the constructor of
   * this class.
   * 
   * @return
   */
  public List getPrimaryKeys() {
    String fieldName = "mPrimaryKeys";
    List node = (List) getPrivateField(fieldName);
    return node;
  }
  
//------------------------
  /**
   * Returns the mForeignKeys field of the Table class passed to the constructor of
   * this class.
   * 
   * @return
   */
  public List getForeignKeys() {
    String fieldName = "mForeignKeys";
    List node = (List) getPrivateField(fieldName);
    return node;
  }

// ------------------------
  /**
   * Returns the mMultiColumnName field of the Table class passed to the
   * constructor of this class.
   * 
   * @return
   */
  public String getMultiColumnName() {
    String fieldName = "mMultiColumnName";
    String node = (String) getPrivateField(fieldName);
    return node;
  }

  // ------------------------
  public Object getPrivateField(String fieldName) {
    Field columnDefinitionNode = null;
    Object field = null;
    try {
      columnDefinitionNode = mTableColumns.getClass().getDeclaredField(
          fieldName);
      columnDefinitionNode.setAccessible(true);
      field = columnDefinitionNode.get(mTableColumns);
    } catch (SecurityException e) {
      mLogger.error(e);
    } catch (NoSuchFieldException e) {
      mLogger.error(e);
    } catch (IllegalArgumentException e) {
      mLogger.error(e);
    } catch (IllegalAccessException e) {
      mLogger.error(e);
    }
    return field;
  }

}