freemarker.core
Class ArithmeticEngine.ConservativeEngine

java.lang.Object
  freemarker.core.ArithmeticEngine
      freemarker.core.ArithmeticEngine.ConservativeEngine

Enclosing class:

ArithmeticEngine

public static class ArithmeticEngine.ConservativeEngine
extends ArithmeticEngine

An arithmetic engine that conservatively widens the operation arguments to extent that they can hold the result of the operation. Widening conversions occur in following situations:

• byte and short are always widened to int (alike to Java language).
• To preserve magnitude: when operands are of different types, the result type is the type of the wider operand.
• to avoid overflows: if add, subtract, or multiply would overflow on integer types, the result is widened from int to long, or from long to BigInteger.
• to preserve fractional part: if a division of integer types would have a fractional part, int and long are converted to double, and BigInteger is converted to BigDecimal. An operation on a float and a long results in a double. An operation on a float or double and a BigInteger results in a BigDecimal.

Nested Class Summary

Nested classes/interfaces inherited from class freemarker.core.ArithmeticEngine

ArithmeticEngine.BigDecimalEngine, ArithmeticEngine.ConservativeEngine

Field Summary

Fields inherited from class freemarker.core.ArithmeticEngine

BIGDECIMAL_ENGINE, CONSERVATIVE_ENGINE, maxScale, minScale, roundingPolicy

Constructor Summary

ArithmeticEngine.ConservativeEngine()

Method Summary

java.lang.Number	add(java.lang.Number first, java.lang.Number second)
int	compareNumbers(java.lang.Number first, java.lang.Number second)
java.lang.Number	divide(java.lang.Number first, java.lang.Number second)
java.lang.Number	modulus(java.lang.Number first, java.lang.Number second)
java.lang.Number	multiply(java.lang.Number first, java.lang.Number second)
java.lang.Number	subtract(java.lang.Number first, java.lang.Number second)
java.lang.Number	toNumber(java.lang.String s)

Methods inherited from class freemarker.core.ArithmeticEngine

setMaxScale, setMinScale, setRoundingPolicy

Methods inherited from class java.lang.Object

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

Constructor Detail

ArithmeticEngine.ConservativeEngine

public ArithmeticEngine.ConservativeEngine()

Method Detail

compareNumbers

public int compareNumbers(java.lang.Number first,
                          java.lang.Number second)
                   throws TemplateException

Specified by:

compareNumbers in class ArithmeticEngine

Throws:

TemplateException

add

public java.lang.Number add(java.lang.Number first,
                            java.lang.Number second)
                     throws TemplateException

Specified by:

add in class ArithmeticEngine

Throws:

TemplateException

subtract

public java.lang.Number subtract(java.lang.Number first,
                                 java.lang.Number second)
                          throws TemplateException

Specified by:

subtract in class ArithmeticEngine

Throws:

TemplateException

multiply

public java.lang.Number multiply(java.lang.Number first,
                                 java.lang.Number second)
                          throws TemplateException

Specified by:

multiply in class ArithmeticEngine

Throws:

TemplateException

divide

public java.lang.Number divide(java.lang.Number first,
                               java.lang.Number second)
                        throws TemplateException

Specified by:

divide in class ArithmeticEngine

Throws:

TemplateException

modulus

public java.lang.Number modulus(java.lang.Number first,
                                java.lang.Number second)
                         throws TemplateException

Specified by:

modulus in class ArithmeticEngine

Throws:

TemplateException

toNumber

public java.lang.Number toNumber(java.lang.String s)

Specified by:

toNumber in class ArithmeticEngine