How to use

AsOfClause

in

org.eclipse.persistence.history

/**
 * ADVANCED:
 * Answers if all objects are to be read as of a past time.  Only true if
 * this is a special historical session.
 * @see #getAsOfClause
 */
public boolean hasAsOfClause() {
  return ((asOfClause != null) && (asOfClause.getValue() != null));
}

/**
 * INTERNAL:
 * Prints the as of clause for an expression inside of the FROM clause.
 */
public void printSQL(ExpressionSQLPrinter printer) {
  ((AsOfClause)super.getValue()).printSQL(printer);
}

  public String printString() {
    return "Universal" + getAsOfClause().toString();
  }
}

writer.write(" ");
if (alias.isDecorated()) {
  ((DecoratedDatabaseTable)alias).getAsOfClause().printSQL(printer);
  writer.write(" ");

public void setSelectionCriteria(Expression expression) {
  super.setSelectionCriteria(expression);
  if ((expression != null) && (defaultBuilder != null) && (defaultBuilder.getQueryClass() == null)){
    // For flashback: Must make sure expression and defaultBuilder always in sync.
    ExpressionBuilder newBuilder = expression.getBuilder();
    if (newBuilder != defaultBuilder) {
      if (hasAsOfClause() && getAsOfClause().isUniversal()) {
        newBuilder.asOf(defaultBuilder.getAsOfClause());
      }
      defaultBuilder = newBuilder;
    }
  }
}

/**
 * INTERNAL:
 * Return if the expression is equal to the other.
 * This is used to allow dynamic expression's SQL to be cached.
 */
@Override
public boolean equals(Object object) {
  if (this == object) {
    return true;
  }
  if (!super.equals(object)) {
    return false;
  }
  DataExpression expression = (DataExpression) object;
  return ((this.baseExpression == expression.getBaseExpression()) || ((this.baseExpression != null) && this.baseExpression.equals(expression.getBaseExpression())))
    && ((getAsOfClause() == expression.getAsOfClause()) || ((getAsOfClause() != null) && getAsOfClause().equals(expression.getAsOfClause())));
}
 

  DatabaseQuery applyToDatabaseQuery(Object valueToApply, DatabaseQuery query, ClassLoader loader, AbstractSession activeSession) {
    if (query.isObjectLevelReadQuery()) {
      ((ObjectLevelReadQuery) query).setAsOfClause(new AsOfClause(Helper.timestampFromString((String)valueToApply)));
    } else {
      throw new IllegalArgumentException(ExceptionLocalization.buildMessage("ejb30-wrong-type-for-query-hint",new Object[]{getQueryId(query), name, getPrintValue(valueToApply)}));
    }
    
    return query;
  }
}

writer.write(" ");
if (alias.isDecorated()) {
  ((DecoratedDatabaseTable)alias).getAsOfClause().printSQL(printer);
  writer.write(" ");

/**
 * PUBLIC:
 * Set the Expression/where clause of the query.
 * The expression should be defined using the query's ExpressionBuilder.
 */
@Override
public void setSelectionCriteria(Expression expression) {
  super.setSelectionCriteria(expression);
  if ((expression != null) && (this.defaultBuilder != null) && (this.defaultBuilder.getQueryClass() == null)){
    // For flashback: Must make sure expression and defaultBuilder always in sync.
    ExpressionBuilder newBuilder = expression.getBuilder();
    if (newBuilder != this.defaultBuilder) {
      if (hasAsOfClause() && getAsOfClause().isUniversal()) {
        newBuilder.asOf(this.defaultBuilder.getAsOfClause());
      }
      this.defaultBuilder = newBuilder;
    }
  }
}

/**
 * INTERNAL:
 * Return if the expression is equal to the other.
 * This is used to allow dynamic expression's SQL to be cached.
 */
@Override
public boolean equals(Object object) {
  if (this == object) {
    return true;
  }
  if (!super.equals(object)) {
    return false;
  }
  DataExpression expression = (DataExpression) object;
  return ((this.baseExpression == expression.getBaseExpression()) || ((this.baseExpression != null) && this.baseExpression.equals(expression.getBaseExpression())))
    && ((getAsOfClause() == expression.getAsOfClause()) || ((getAsOfClause() != null) && getAsOfClause().equals(expression.getAsOfClause())));
}

/**
 * {@inheritDoc}
 */
@Override
public void visit(AsOfClause expression) {
  Expression queryExpression = queryContext.buildExpression(expression);
  org.eclipse.persistence.history.AsOfClause asOfClause;
  if (expression.hasScn()) {
    asOfClause = new AsOfSCNClause(queryExpression);
  }
  else {
    asOfClause = new org.eclipse.persistence.history.AsOfClause(queryExpression);
  }
  query.setAsOfClause(asOfClause);
  query.setShouldMaintainCache(false);
}

/**
 * INTERNAL:
 * Gets the actual as of clause represented by <code>this</code>.
 */
public AsOfClause getAsOfClause() {
  return (AsOfClause)super.getValue();
}

/**
 * INTERNAL:
 * Prints the as of clause for an expression inside of the FROM clause.
 */
public void printSQL(ExpressionSQLPrinter printer) {
  ((AsOfClause)super.getValue()).printSQL(printer);
}

((DecoratedDatabaseTable)alias).getAsOfClause().printSQL(printer);
writer.write(" ");
((DecoratedDatabaseTable)alias).getAsOfClause().printSQL(printer);

/**
 * PUBLIC:
 * Set the Expression/where clause of the query.
 * The expression should be defined using the query's ExpressionBuilder.
 */
@Override
public void setSelectionCriteria(Expression expression) {
  super.setSelectionCriteria(expression);
  if ((expression != null) && (this.defaultBuilder != null) && (this.defaultBuilder.getQueryClass() == null)){
    // For flashback: Must make sure expression and defaultBuilder always in sync.
    ExpressionBuilder newBuilder = expression.getBuilder();
    if (newBuilder != this.defaultBuilder) {
      if (hasAsOfClause() && getAsOfClause().isUniversal()) {
        newBuilder.asOf(this.defaultBuilder.getAsOfClause());
      }
      this.defaultBuilder = newBuilder;
    }
  }
}

  public String printString() {
    return "Universal" + getAsOfClause().toString();
  }
}

/**
 * INTERNAL:
 * Return if the expression is equal to the other.
 * This is used to allow dynamic expression's SQL to be cached.
 */
public boolean equals(Object object) {
  if (this == object) {
    return true;
  }
  if (!super.equals(object)) {
    return false;
  }
  DataExpression expression = (DataExpression) object;
  return ((getBaseExpression() == expression.getBaseExpression()) || ((getBaseExpression() != null) && getBaseExpression().equals(expression.getBaseExpression())))
    && ((getAsOfClause() == expression.getAsOfClause()) || ((getAsOfClause() != null) && getAsOfClause().equals(expression.getAsOfClause())));
}

/**
 * {@inheritDoc}
 */
@Override
public void visit(AsOfClause expression) {
  Expression queryExpression = queryContext.buildExpression(expression);
  org.eclipse.persistence.history.AsOfClause asOfClause;
  if (expression.hasScn()) {
    asOfClause = new AsOfSCNClause(queryExpression);
  }
  else {
    asOfClause = new org.eclipse.persistence.history.AsOfClause(queryExpression);
  }
  query.setAsOfClause(asOfClause);
  query.setShouldMaintainCache(false);
}

/**
 * ADVANCED:
 * Answers if all objects are to be read as of a past time.  Only true if
 * this is a special historical session.
 * @see #getAsOfClause
 */
public boolean hasAsOfClause() {
  return ((asOfClause != null) && (asOfClause.getValue() != null));
}

/**
 * INTERNAL:
 * Prints the as of clause for an expression inside of the FROM clause.
 */
public void printSQL(ExpressionSQLPrinter printer) {
  ((AsOfClause)super.getValue()).printSQL(printer);
}