org.eclipse.smila.jobmanager.util
Class ValueExpression

java.lang.Object
  org.eclipse.smila.jobmanager.util.ValueExpression

public final class ValueExpression
extends java.lang.Object

ValueXpression encapsulates a string with potential variable references.

Field Summary

static java.lang.String

VARIABLE_REGEX variable pattern string.

Constructor Summary

ValueExpression(java.lang.String expression)
Constructs a new VariableExpression.

Method Summary

boolean	equals(java.lang.Object arg0)
ValueExpression	evaluate(java.util.Map<java.lang.String,java.lang.String> context) Evaluates an expression with a given context.
ValueExpression	evaluateExpr(java.util.Map<java.lang.String,ValueExpression> context) Evaluates an expression with a given context.
java.util.Map<java.lang.String,java.lang.String>	extractValues(java.lang.String evaluatedExpression) try to extract variable values from a string that should be created from the expression.
java.lang.String	getExpression() Returns the expression as a String.
java.util.Collection<java.lang.String>	getVariables() Gets the recognizes variable names in the value.
int	hashCode()
boolean	referencesVariables() Checks if this valueExpression contains a references to a variable.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

VARIABLE_REGEX

public static final java.lang.String VARIABLE_REGEX

variable pattern string.

See Also:

Constant Field Values

Constructor Detail

ValueExpression

public ValueExpression(java.lang.String expression)

Constructs a new VariableExpression.

Parameters:

expression - The expression string.

Method Detail

evaluate

public ValueExpression evaluate(java.util.Map<java.lang.String,java.lang.String> context)

Evaluates an expression with a given context.

Parameters:

context - A map with known variables, will be used to resolve variables within the expression.

Returns:

An expression with each variable references exchanged by the corresponding values in the context.

evaluateExpr

public ValueExpression evaluateExpr(java.util.Map<java.lang.String,ValueExpression> context)

Evaluates an expression with a given context.

Parameters:

context - A map with known variables, will be used to resolve variables within the expression.

Returns:

An expression with each variable references exchanged by the corresponding values in the context.

extractValues

public java.util.Map<java.lang.String,java.lang.String> extractValues(java.lang.String evaluatedExpression)

try to extract variable values from a string that should be created from the expression. Throws IllegalArgumentException if no match could be found.

Parameters:

evaluatedExpression - value that is supposed to be created from the expression.

Returns:

variable values.

referencesVariables

public boolean referencesVariables()

Checks if this valueExpression contains a references to a variable.

Returns:

true if this valueExpression contains a references to a variable.

getVariables

public java.util.Collection<java.lang.String> getVariables()

Gets the recognizes variable names in the value.

Returns:

The recognized variables.

getExpression

public java.lang.String getExpression()

Returns the expression as a String.

Returns:

The expression as a String.

equals

public boolean equals(java.lang.Object arg0)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object