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:

  • 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