org.apache.torque.sql

## Class WhereClauseExpression

- java.lang.Object
- - org.apache.torque.sql.WhereClauseExpression

-     public class WhereClauseExpression
      extends Object

  The raw values for a part of the where clause of a SQL statement, either of the form lValue operator rValue, e.g. author.author_id = 1, or in form of a custom sql query with sql and replacement values.
  Version:
    $Id: WhereClauseExpression.java 1867515 2019-09-25 15:02:03Z gk $

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `WhereClauseExpression(Object lValue, SqlEnum operator, Object rValue, String sql, Object[] preparedStatementReplacements)` Constructor.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object obj)`
    `Object` | `getLValue()` Returns the value on the left hand side of the operator of the expression.
    `SqlEnum` | `getOperator()` Returns the value on the operator of the expression.
    `Object[]` | `getPreparedStatementReplacements()` Returns the values for the placeholders in the verbatim sql condition.
    `Object` | `getRValue()` Returns the value on the right hand side of the operator of the expression.
    `String` | `getSql()` Returns the verbatim sql for this expression, if any.
    `int` | `hashCode()`
    `boolean` | `isVerbatimSqlCondition()` Returns whether this expression represents a verbatim sql condition.
    `void` | `setLValue(Object lValue)` Sets the value on the left hand side of the operator of the expression.
    `void` | `setOperator(SqlEnum operator)` Sets the value on the operator of the expression.
    `void` | `setRValue(Object rValue)` Sets the value on the right hand side of the operator of the expression.
    `String` | `toString()`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### WhereClauseExpression

          public WhereClauseExpression(Object lValue,
                                       SqlEnum operator,
                                       Object rValue,
                                       String sql,
                                       Object[] preparedStatementReplacements)

      Constructor.
      Parameters:
        `lValue` - The value on the left hand side of the operator of the expression. The value represents the name of a database column.
        `operator` - the operator. Either this parameter or sql must be not null.
        `rValue` - The value on the right hand side of the operator of the expression. The value represents the name of a database column.
        `sql` - a verbatim sql condition. Either this parameter or operator must be not null.
        `preparedStatementReplacements` - Values for the placeholders in the verbatim sql condition.

  - ### Method Detail

    - #### getLValue

          public Object getLValue()

      Returns the value on the left hand side of the operator of the expression.
      Returns:
        the lValue.

    - #### setLValue

          public void setLValue(Object lValue)

      Sets the value on the left hand side of the operator of the expression. The value represents the name of a database column.
      Parameters:
        `lValue` - the value to set, not null or empty.
      Throws:
        `IllegalArgumentException` - if lValue is null or empty.

    - #### getOperator

          public SqlEnum getOperator()

      Returns the value on the operator of the expression.
      Returns:
        the operator, or null if this Expression represents a verbatim sql expression.

    - #### setOperator

          public void setOperator(SqlEnum operator)

      Sets the value on the operator of the expression.
      Parameters:
        `operator` - the value to set, or null fo no operator.

    - #### getRValue

          public Object getRValue()

      Returns the value on the right hand side of the operator of the expression.
      Returns:
        the rValue, or null.

    - #### setRValue

          public void setRValue(Object rValue)

      Sets the value on the right hand side of the operator of the expression.
      Parameters:
        `rValue` - the value to set, or null for the empty String.

    - #### getSql

          public String getSql()

      Returns the verbatim sql for this expression, if any.
      Returns:
        the verbatim sql for this expression, or null if not given.

    - #### getPreparedStatementReplacements

          public Object[] getPreparedStatementReplacements()

      Returns the values for the placeholders in the verbatim sql condition.
      Returns:
        the placeholder values, or null.

    - #### isVerbatimSqlCondition

          public boolean isVerbatimSqlCondition()

      Returns whether this expression represents a verbatim sql condition.
      Returns:
        true if this Criterion represents a verbatim sql condition, false if the sql is computed from lValue, comparison and rValue.

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Object`

    - #### equals

          public boolean equals(Object obj)

      Overrides:
        `equals` in class `Object`

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

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