com.caucho.el

Class PathExpr

java.lang.Object

javax.el.Expression

javax.el.ValueExpression

com.caucho.el.Expr

com.caucho.el.PathExpr

All Implemented Interfaces:

java.io.Serializable

public class PathExpr
extends Expr

Represents a field reference that may also be a dotted property, e.g. smtp.mail.host.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.caucho.el.Expr

L, log

Constructor Summary

Constructors

Constructor and Description
PathExpr(Expr expr, java.lang.String path) Creates a new path expression.

Method Summary

Modifier and Type	Method and Description
Expr	createField(java.lang.String field) Creates a field reference using this expression as the base object.
Expr	createMethod(Expr[] args) Creates a method call using this as the obj.method expression
boolean	equals(java.lang.Object o) Returns true for equal strings.
MethodInfo	getMethodInfo(ELContext env, java.lang.Class<?> retType, java.lang.Class<?>[] argTypes) Returns the method info.
java.lang.Class<?>	getType(ELContext env) Evaluates the expression as applicable to the provided context, and returns the most general type that can be accepted by the setValue(javax.el.ELContext, java.lang.Object) method.
java.lang.Object	getValue(ELContext env) Evaluate the expression as an object.
ValueReference	getValueReference(ELContext context)
java.lang.Object	invoke(ELContext env, java.lang.Class<?>[] argTypes, java.lang.Object[] args) Evaluates the expression, returning an object.
boolean	isReadOnly(ELContext env) Evaluate the expression as an object.
void	printCreate(WriteStream os) Prints the code to create an LongLiteral.
void	setValue(ELContext env, java.lang.Object value) Evaluate the expression as an object.
java.lang.String	toString() Returns a readable representation of the expr.

Methods inherited from class com.caucho.el.Expr

coerceToType, createField, error, evalBigDecimal, evalBigInteger, evalBoolean, evalCharacter, evalDouble, evalLong, evalObject, evalPeriod, evalString, evalStringWithNull, getExpectedType, getExpressionString, hashCode, invocationError, isConstant, isDouble, isDoubleString, isLiteralText, print, print, printEscaped, printEscapedString, setProperty, toBigDecimal, toBigInteger, toBoolean, toCharacter, toClass, toDouble, toEnum, toLong, toStream, toStream, toStream, toStreamEscaped, toStreamEscaped, toStreamEscaped, toString, toString, toString, toString, toString, toStringWithNull

Methods inherited from class java.lang.Object

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

Constructor Detail

PathExpr

public PathExpr(Expr expr,
                java.lang.String path)

Creates a new path expression.

Parameters:

expr - the underlying expression

path - the property name to use if null

Method Detail

createField

public Expr createField(java.lang.String field)

Creates a field reference using this expression as the base object.

Overrides:

createField in class Expr

Parameters:

field - the string reference for the field.

createMethod

public Expr createMethod(Expr[] args)

Creates a method call using this as the obj.method expression

Overrides:

createMethod in class Expr

Parameters:

args - the arguments for the method

getType

public java.lang.Class<?> getType(ELContext env)
                           throws PropertyNotFoundException,
                                  ELException

Evaluates the expression as applicable to the provided context, and returns the most general type that can be accepted by the setValue(javax.el.ELContext, java.lang.Object) method.

Overrides:

getType in class Expr

Parameters:

env -

Returns:

Throws:

PropertyNotFoundException

ELException

getValue

public java.lang.Object getValue(ELContext env)
                          throws ELException

Evaluate the expression as an object.

Specified by:

getValue in class Expr

Parameters:

env - the variable environment

Returns:

the evaluated object

Throws:

ELException

isReadOnly

public boolean isReadOnly(ELContext env)
                   throws ELException

Evaluate the expression as an object.

Overrides:

isReadOnly in class Expr

Parameters:

env - the variable environment

Returns:

the evaluated object

Throws:

ELException

setValue

public void setValue(ELContext env,
                     java.lang.Object value)
              throws ELException

Evaluate the expression as an object.

Overrides:

setValue in class Expr

Parameters:

env - the variable environment

Throws:

ELException

getValueReference

public ValueReference getValueReference(ELContext context)

Overrides:

getValueReference in class ValueExpression

getMethodInfo

public MethodInfo getMethodInfo(ELContext env,
                                java.lang.Class<?> retType,
                                java.lang.Class<?>[] argTypes)
                         throws ELException

Returns the method info.

Overrides:

getMethodInfo in class Expr

Parameters:

env - the variable environment

Returns:

the value of the expression as an object

Throws:

ELException

invoke

public java.lang.Object invoke(ELContext env,
                               java.lang.Class<?>[] argTypes,
                               java.lang.Object[] args)
                        throws ELException

Evaluates the expression, returning an object.

Overrides:

invoke in class Expr

Parameters:

env - the variable environment

Returns:

the value of the expression as an object

Throws:

ELException

printCreate

public void printCreate(WriteStream os)
                 throws java.io.IOException

Prints the code to create an LongLiteral.

Overrides:

printCreate in class Expr

Parameters:

os - stream to the generated *.java code

Throws:

java.io.IOException

equals

public boolean equals(java.lang.Object o)

Returns true for equal strings.

Overrides:

equals in class Expr

toString

public java.lang.String toString()

Returns a readable representation of the expr.

Specified by:

toString in class Expr