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java.lang.Objectjavax.el.Expression
javax.el.ValueExpression
com.caucho.el.Expr
com.caucho.el.NullLiteral
public class NullLiteral
Represents a null literal expression.
Field Summary |
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Fields inherited from class com.caucho.el.Expr |
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L, log |
Constructor Summary | |
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NullLiteral()
Create the literal. |
Method Summary | |
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boolean |
equals(java.lang.Object o)
Returns true for equal strings. |
java.lang.Object |
getValue(ELContext env)
Evaluate the expression as an object. |
boolean |
isConstant()
Returns true if the expression is constant. |
boolean |
print(WriteStream out,
ELContext env,
boolean isEscaped)
Evalutes directly to the output. |
void |
printCreate(WriteStream os)
Prints the code to create an LongLiteral. |
java.lang.String |
toString()
Returns a printable view. |
Methods inherited from class com.caucho.el.Expr |
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coerceToType, createField, createField, createMethod, error, evalBigDecimal, evalBigInteger, evalBoolean, evalCharacter, evalDouble, evalLong, evalObject, evalPeriod, evalString, evalStringWithNull, getExpectedType, getExpressionString, getMethodInfo, getType, hashCode, invocationError, invoke, isDouble, isDoubleString, isLiteralText, isReadOnly, print, printEscaped, printEscapedString, setProperty, setValue, toBigDecimal, toBigInteger, toBoolean, toCharacter, toClass, toDouble, toEnum, toLong, toStream, toStream, toStream, toStreamEscaped, toStreamEscaped, toStreamEscaped, toString, toString, toString, toString, toString, toStringWithNull |
Methods inherited from class javax.el.ValueExpression |
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getValueReference |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public NullLiteral()
Method Detail |
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public boolean isConstant()
isConstant
in class Expr
public java.lang.Object getValue(ELContext env) throws ELException
getValue
in class Expr
env
- the variable environment
ELException
public boolean print(WriteStream out, ELContext env, boolean isEscaped) throws java.io.IOException, ELException
print
in class Expr
out
- the output writerenv
- the variable environmentisEscaped
- if true, escape reserved XML
java.io.IOException
ELException
public void printCreate(WriteStream os) throws java.io.IOException
printCreate
in class Expr
os
- the stream to the *.java page
java.io.IOException
public boolean equals(java.lang.Object o)
equals
in class Expr
public java.lang.String toString()
toString
in class Expr
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