Package org.teiid.core.types.basic

Source Code of org.teiid.core.types.basic.StringToTimestampTransform

/*
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* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.  Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/

package org.teiid.core.types.basic;

import java.sql.Timestamp;

import org.teiid.core.CorePlugin;
import org.teiid.core.types.Transform;
import org.teiid.core.types.TransformationException;


public class StringToTimestampTransform extends Transform {

  /**
   * This method transforms a value of the source type into a value
   * of the target type.
   * @param value Incoming value of source type
   * @return Outgoing value of target type
   * @throws TransformationException if value is an incorrect input type or
   * the transformation fails
   */
  public Object transformDirect(Object value) throws TransformationException {
    value = ((String) value).trim();
    Timestamp result = null;
    try {
      result = Timestamp.valueOf( (String) value );
    } catch(Exception e) {
      throw new TransformationException(e, "ERR.003.029.0024", CorePlugin.Util.getString("ERR.003.029.0024", value)); //$NON-NLS-1$ //$NON-NLS-2$
    }
    //validate everything except for fractional seconds
    if (!((String)value).startsWith(result.toString().substring(0, 19))) {
      throw new TransformationException(CorePlugin.Util.getString("transform.invalid_string_for_date", value, getTargetType().getSimpleName())); //$NON-NLS-1$
    }
    return result;
  }

  /**
   * Type of the incoming value.
   * @return Source type
   */
  public Class getSourceType() {
    return String.class;
  }

  /**
   * Type of the outgoing value.
   * @return Target type
   */
  public Class getTargetType() {
    return Timestamp.class;
  }
 
  @Override
  public boolean isExplicit() {
    return true;
  }

}
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