# com.bea.p13n.expression.operator.string
StringOperator Class

public abstract class StringOperator
extends `Operator`

Implementation of the StringOperator operator. Base class for all StringOperators.

Hierarchy
  `Object`
  `ComplexExpressionImpl`
  `Operator`
  `StringOperator`

All Implemented Interfaces
  `Cloneable`, `Expression`, `Serializable`

Direct Known Subclasses
  `StringCharAt`, `StringCompareToIgnoreCase`, `StringConcat`, `StringContains`, `StringEndsWith`, `StringEqualsIgnoreCase`, `StringLength`, `StringLike`, `StringReplace`, `StringStartsWith`, `StringSubstring`, `StringToLowerCase`, `StringToUpperCase`, `StringTrim`

## Field Summary

`protected static final `Class`` | `BINARY_PARAMETER_SIGNATURE` Class
`protected static final `Class`` | `UNARY_PARAMETER_SIGNATURE` Class

## Constructor Summary

StringOperator()
StringOperator(`Object` lhs, `Object` rhs)
StringOperator(`Object` unaryOperand)

## Method Summary

Methods from `com.bea.p13n.expression.operator.`Operator``
``leftHandSide`, `operand`, `rightHandSide``

Methods from `com.bea.p13n.expression.internal.`ComplexExpressionImpl``
`addListener, addSubExpression, clearCache, clone, createProxyExpression, equals, getCachedValue, getParent, getSource, getSubExpression, getSubExpressionCount, getUserData, hashCode, isCached, isCacheEnabled, isEqualitySubExpression, notifyListeners, removeAllSubExpressions, removeListener, removeSubExpression, removeSubExpression, setCachedValue, setCacheEnabled, setParent, setSource, setSubExpression, setUserData, toString, write`

Methods from class `java.lang.`Object``
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods from interface `com.bea.p13n.expression.`Expression``
``accept`, `addListener`, `addSubExpression`, `clearCache`, `clone`, `getCachedValue`, `getParameterSignature`, `getParent`, `getSource`, `getSubExpression`, `getSubExpressionCount`, `getUserData`, `isCached`, `isCacheEnabled`, `removeAllSubExpressions`, `removeListener`, `removeSubExpression`, `removeSubExpression`, `setCachedValue`, `setCacheEnabled`, `setSource`, `setSubExpression`, `setUserData`, `write``

## Field Detail

### BINARY_PARAMETER_SIGNATURE

    protected static final Class BINARY_PARAMETER_SIGNATURE

### UNARY_PARAMETER_SIGNATURE

    protected static final Class UNARY_PARAMETER_SIGNATURE

## Constructor Detail

### StringOperator

    protected StringOperator()

### StringOperator

    protected StringOperator(Object lhs,
                             Object rhs)

### StringOperator

    protected StringOperator(Object unaryOperand)