Package ch.andre601.expressionparser.templates

Class ConstantExpressionTemplate

java.lang.Object

ch.andre601.expressionparser.templates.ConstantExpressionTemplate

All Implemented Interfaces:

ExpressionTemplate

public class ConstantExpressionTemplate
extends Object
implements ExpressionTemplate

An ExpressionTemplate instance that holds a ToBooleanExpression, ToDoubleExpression and ToStringExpression instance to call.

Static methods are available to create a new instance from a boolean, double or String respectively, with each having a different way of converting the provided value into the other outputs:

• boolean
  • boolean: Use as-is
  • double: 1 if true, else 0
  • String: Convert using Boolean.toString(boolean)
• double
  • boolean: true if not zero, else false
  • double: Use as-is
  • String: Convert using Integer.toString(int) if Integer or Double.toString(double) if Double
• String
  • boolean: Convert using Boolean.parseBoolean(String)
  • double: Convert using Double.parseDouble(String). Should it fail, uses length of String
  • String: Use as-is

Constructor Summary

Constructors

Constructor	Description
ConstantExpressionTemplate(boolean booleanValue, double doubleValue, String stringValue)	Constructor for creating a new ConstantExpressionTemplate.

Method Summary

Modifier and Type	Method	Description
static ConstantExpressionTemplate	of(boolean booleanValue)	Creates a new ConstantExpressionTemplate using the provided boolean value.
static ConstantExpressionTemplate	of(double doubleValue)	Creates a new ConstantExpressionTemplate using the provided double value.
static ConstantExpressionTemplate	of(String stringValue)	Creates a new ConstantExpressionTemplate using the provided String value.
ToBooleanExpression	returnBooleanExpression()	Returns the ToBooleanExpression instance this ExpressionTemplate holds.
ToDoubleExpression	returnDoubleExpression()	Returns the ToDoubleExpression instance this ExpressionTemplate holds.
ToStringExpression	returnStringExpression()	Returns the ToStringExpression instance this ExpressionTemplate holds.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ConstantExpressionTemplate

public ConstantExpressionTemplate(boolean booleanValue,
 double doubleValue,
 String stringValue)

Constructor for creating a new ConstantExpressionTemplate.

Parameters:

booleanValue - The boolean value to store.

doubleValue - The double value to store.

stringValue - The String value to store.

Method Details

of

public static ConstantExpressionTemplate of(boolean booleanValue)

Creates a new ConstantExpressionTemplate using the provided boolean value.

For ToDoubleExpression's double value is 1 used for boolean value true and 0 for boolean value false.
For ToStringExpression's String value is Boolean.toString(boolean) used.

Parameters:

booleanValue - The boolean value to use.

Returns:

new ConstantExpressionTemplate holding the ToBooleanExpression, ToDoubleExpression and ToStringExpression instances.

of

public static ConstantExpressionTemplate of(double doubleValue)

Creates a new ConstantExpressionTemplate using the provided double value.

For ToBooleanExperssion's boolean value true is used if the double value is anything but 0, otherwise false.
For ToStringExpression's String value Integer.toString(int) or Double.toString(double) is used depending on if the double can be cast to integer.

Parameters:

doubleValue - The double value to use.

Returns:

new ConstantExpressionTemplate holding the ToBooleanExpression, ToDoubleExpression and ToStringExpression instances.

of

public static ConstantExpressionTemplate of(String stringValue)

Creates a new ConstantExpressionTemplate using the provided String value.

For ToBooleanExpression's boolean value Boolean.parseBoolean(String) is used.
For ToDoubleExpression's double value Double.parseDouble(String) is used. In case of an exception happening, the String's length is used instead.

Parameters:

stringValue - The String value to use.

Returns:

new ConstantExpressionTemplate holding the ToBooleanExpression, ToDoubleExpression and ToStringExpression instances.

returnBooleanExpression

public ToBooleanExpression returnBooleanExpression()

Returns the ToBooleanExpression instance this ExpressionTemplate holds.

Specified by:

returnBooleanExpression in interface ExpressionTemplate

Returns:

The ToBooleanExpression stored in this ConstantExpressionTemplate.

returnDoubleExpression

public ToDoubleExpression returnDoubleExpression()

Returns the ToDoubleExpression instance this ExpressionTemplate holds.

Specified by:

returnDoubleExpression in interface ExpressionTemplate

Returns:

The ToDoubleExpression stored in this ConstantExpressionTemplate.

returnStringExpression

public ToStringExpression returnStringExpression()

Returns the ToStringExpression instance this ExpressionTemplate holds.

Specified by:

returnStringExpression in interface ExpressionTemplate

Returns:

The ToStringExpression stored in this ConstantExpressionTemplate.