JspValueExpression (Apache Tomcat 7.0.109 API Documentation)

java.lang.Object
- javax.el.Expression
- - javax.el.ValueExpression
  - - org.apache.jasper.el.JspValueExpression

All Implemented Interfaces:

Externalizable, Serializable
```
public final class JspValueExpression
extends ValueExpression
implements Externalizable
```
Wrapper for providing context to ValueExpressions

Author:

Jacob Hookom

See Also:
Serialized Form

Constructor Summary

Constructors
Constructor and Description

JspValueExpression()

JspValueExpression(String mark, ValueExpression target)

Constructors
Constructor and Description
`JspValueExpression()`
`JspValueExpression(String mark, ValueExpression target)`

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object obj)`
`Class<?>`	`getExpectedType()`
`String`	`getExpressionString()`
`Class<?>`	`getType(ELContext context)`
`Object`	`getValue(ELContext context)`
`int`	`hashCode()`
`boolean`	`isLiteralText()`
`boolean`	`isReadOnly(ELContext context)`
`void`	`readExternal(ObjectInput in)`
`void`	`setValue(ELContext context, Object value)`
`void`	`writeExternal(ObjectOutput out)`

Methods inherited from class javax.el.ValueExpression
getValueReference

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - JspValueExpression
```
public JspValueExpression()
```
  - JspValueExpression
```
public JspValueExpression(String mark,
                  ValueExpression target)
```
- Method Detail
  - getExpectedType
```
public Class<?> getExpectedType()
```
    Specified by:
    
    getExpectedType in class ValueExpression
  - getType
```
public Class<?> getType(ELContext context)
                 throws NullPointerException,
                        PropertyNotFoundException,
                        ELException
```
    Specified by:
    
    getType in class ValueExpression
    
    Parameters:
    context - The EL context for this evaluation
    
    Returns:
    The type of the result of this value expression
    
    Throws:
    
    NullPointerException - If the supplied context is null
    
    PropertyNotFoundException - If a property/variable resolution failed because no match was found or a match was found but was not readable
    
    ELException - Wraps any exception throw whilst resolving a property or variable
  - isReadOnly
```
public boolean isReadOnly(ELContext context)
                   throws NullPointerException,
                          PropertyNotFoundException,
                          ELException
```
    Specified by:
    
    isReadOnly in class ValueExpression
    
    Parameters:
    context - The EL context for this evaluation
    
    Returns:
    true if this expression is read only otherwise false
    
    Throws:
    
    NullPointerException - If the supplied context is null
    
    PropertyNotFoundException - If a property/variable resolution failed because no match was found or a match was found but was not readable
    
    ELException - Wraps any exception throw whilst resolving a property or variable
  - setValue
```
public void setValue(ELContext context,
            Object value)
              throws NullPointerException,
                     PropertyNotFoundException,
                     PropertyNotWritableException,
                     ELException
```
    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
    
    Throws:
    
    NullPointerException - If the supplied context is null
    
    PropertyNotFoundException - If a property/variable resolution failed because no match was found
    
    PropertyNotWritableException - If a property/variable resolution failed because a match was found but was not writable
    
    ELException - Wraps any exception throw whilst resolving a property or variable
  - getValue
```
public Object getValue(ELContext context)
                throws NullPointerException,
                       PropertyNotFoundException,
                       ELException
```
    Specified by:
    
    getValue in class ValueExpression
    
    Parameters:
    context - The EL context for this evaluation
    
    Returns:
    The result of evaluating this value expression
    
    Throws:
    
    NullPointerException - If the supplied context is null
    
    PropertyNotFoundException - If a property/variable resolution failed because no match was found or a match was found but was not readable
    
    ELException - Wraps any exception throw whilst resolving a property or variable
  - equals
```
public boolean equals(Object obj)
```
    Specified by:
    
    equals in class Expression
  - hashCode
```
public int hashCode()
```
    Specified by:
    
    hashCode in class Expression
  - getExpressionString
```
public String getExpressionString()
```
    Specified by:
    
    getExpressionString in class Expression
  - isLiteralText
```
public boolean isLiteralText()
```
    Specified by:
    
    isLiteralText in class Expression
  - 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

Class JspValueExpression

Constructor Summary

Method Summary

Methods inherited from class javax.el.ValueExpression

Methods inherited from class java.lang.Object

Constructor Detail

JspValueExpression

JspValueExpression

Method Detail

getExpectedType

getType

isReadOnly

setValue

getValue

equals

hashCode

getExpressionString

isLiteralText

writeExternal

readExternal