# Class ValueExpressionLiteral

java.lang.Object
jakarta.el.Expression
jakarta.el.ValueExpression
org.apache.el.ValueExpressionLiteral

All Implemented Interfaces:
  `Externalizable, Serializable`

public final class ValueExpressionLiteral extends ValueExpression implements Externalizable
A literal value expression that represents a constant value.

See Also:
  - Serialized Form

## Constructor Summary

Constructors
Constructor
Description
`ValueExpressionLiteral()`
Constructs a new ValueExpressionLiteral for deserialization.
`ValueExpressionLiteral(Object value, Class<?> expectedType)`
Constructs a new ValueExpressionLiteral.

## Method Summary

Modifier and Type
Method
Description
`boolean`
`equals(Object obj)`
`boolean`
`equals(ValueExpressionLiteral ve)`
Compares this literal value expression with another for equality.
`Class<?>`
`getExpectedType()`
Returns the expected type of the result of this expression.
`String`
`getExpressionString()`
Returns the original string representation of this EL expression as it was parsed.
`Class<?>`
`getType(ELContext context)`
Returns the type of the result produced by evaluating this expression.
`<T> T`
`getValue(ELContext context)`
Evaluates this expression and returns the result.
`int`
`hashCode()`
`boolean`
`isLiteralText()`
Returns whether this expression is a literal text expression, meaning it does not contain any variables, functions, or operators and evaluates to a constant value.
`boolean`
`isReadOnly(ELContext context)`
Determines whether the property referenced by this expression is read-only.
`void`
`readExternal(ObjectInput in)`
`void`
`setValue(ELContext context, Object value)`
Sets the value of the property referenced by this expression.
`void`
`writeExternal(ObjectOutput out)`

### Methods inherited from class ValueExpression

`getValueReference`

### Methods inherited from class Object

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

## Constructor Details

### ValueExpressionLiteral

public ValueExpressionLiteral()
Constructs a new ValueExpressionLiteral for deserialization.

### ValueExpressionLiteral

public ValueExpressionLiteral(Object value, Class<?> expectedType)
Constructs a new ValueExpressionLiteral.

Parameters:
  `value` - The literal value
  `expectedType` - The expected return type

## Method Details

### getValue

public <T> T getValue(ELContext context)
Description copied from class: `jakarta.el.ValueExpression`
Evaluates this expression and returns the result.

Specified by:
  `getValue` in class `ValueExpression`
Type Parameters:
  `T` - The expected type for the result of evaluating this value expression
Parameters:
  `context` - The EL context for this evaluation
Returns:
  The result of evaluating this value expression

### setValue

public void setValue(ELContext context, Object value)
Description copied from class: `jakarta.el.ValueExpression`
Sets the value of the property referenced by this expression.

Specified by:
  `setValue` in class `ValueExpression`
Parameters:
  `context` - The EL context for this evaluation
  `value` - The value to set the property to which this value expression refers

### isReadOnly

public boolean isReadOnly(ELContext context)
Description copied from class: `jakarta.el.ValueExpression`
Determines whether the property referenced by this expression is read-only.

Specified by:
  `isReadOnly` in class `ValueExpression`
Parameters:
  `context` - The EL context for this evaluation
Returns:
  `true` if this expression is read only otherwise `false`

### getType

public Class<?> getType(ELContext context)
Description copied from class: `jakarta.el.ValueExpression`
Returns the type of the result produced by evaluating this expression.

Specified by:
  `getType` in class `ValueExpression`
Parameters:
  `context` - The EL context for this evaluation
Returns:
  The type of the result of this value expression

### getExpectedType

public Class<?> getExpectedType()
Description copied from class: `jakarta.el.ValueExpression`
Returns the expected type of the result of this expression.

Specified by:
  `getExpectedType` in class `ValueExpression`
Returns:
  The expected result type, or `Object.class` if no specific type is expected

### getExpressionString

public String getExpressionString()
Description copied from class: `jakarta.el.Expression`
Returns the original string representation of this EL expression as it was parsed.

Specified by:
  `getExpressionString` in class `Expression`
Returns:
  the string representation of this expression

### equals

public boolean equals(Object obj)

Specified by:
  `equals` in class `Expression`

### equals

public boolean equals(ValueExpressionLiteral ve)
Compares this literal value expression with another for equality.

Parameters:
  `ve` - The other literal value expression
Returns:
  `true` if the values are equal, `false` otherwise

### hashCode

public int hashCode()

Specified by:
  `hashCode` in class `Expression`

### isLiteralText

public boolean isLiteralText()
Description copied from class: `jakarta.el.Expression`
Returns whether this expression is a literal text expression, meaning it does not contain any variables, functions, or operators and evaluates to a constant value.

Specified by:
  `isLiteralText` in class `Expression`
Returns:
  `true` if this expression is a literal text, `false` otherwise

### writeExternal

public void writeExternal(ObjectOutput out) throws IOException

Specified by:
  `writeExternal` in interface `Externalizable`
Throws:
  `IOException`

### readExternal

public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException

Specified by:
  `readExternal` in interface `Externalizable`
Throws:
  `IOException`
  `ClassNotFoundException`