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Code Issues Releases Wiki Activity

Move two more operators into separate classes.

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This commit is contained in:
Danila Fedorin 2017-09-23 16:19:45 -07:00
parent 81d0999c11
commit 579ff78a99
3 changed files with 52 additions and 45 deletions
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48
core/src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java
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@ -5,10 +5,7 @@ import org.nwapw.abacus.function.*;
import org.nwapw.abacus.number.NaiveNumber;
import org.nwapw.abacus.number.NumberInterface;
import org.nwapw.abacus.number.PreciseNumber;
import org.nwapw.abacus.plugin.standard.OperatorAdd;
import org.nwapw.abacus.plugin.standard.OperatorDivide;
import org.nwapw.abacus.plugin.standard.OperatorMultiply;
import org.nwapw.abacus.plugin.standard.OperatorSubtract;
import org.nwapw.abacus.plugin.standard.*;
import org.nwapw.abacus.tree.TreeNode;
import org.nwapw.abacus.tree.VariableNode;
@ -65,17 +62,7 @@ public class StandardPlugin extends Plugin {
/**
* The negation operator, -
*/
public static final NumberOperator OP_NEGATE = new NumberOperator(OperatorAssociativity.LEFT, OperatorType.UNARY_PREFIX, 0) {
@Override
public boolean matchesParams(MutableEvaluationContext context, NumberInterface[] params) {
return params.length == 1;
}
@Override
public NumberInterface applyInternal(MutableEvaluationContext context, NumberInterface[] params) {
return params[0].negate();
}
};
public static final NumberOperator OP_NEGATE = new OperatorNegate();
/**
* The multiplication operator, *
*/
@ -138,36 +125,7 @@ public class StandardPlugin extends Plugin {
/**
* The factorial operator, !
*/
public static final NumberOperator OP_FACTORIAL = new NumberOperator(OperatorAssociativity.RIGHT, OperatorType.UNARY_POSTFIX, 0) {
//private HashMap<Class<? extends NumberInterface>, ArrayList<NumberInterface>> storedList = new HashMap<Class<? extends NumberInterface>, ArrayList<NumberInterface>>();
@Override
public boolean matchesParams(MutableEvaluationContext context, NumberInterface[] params) {
return params.length == 1
&& params[0].fractionalPart().compareTo(context.getInheritedNumberImplementation().instanceForString("0")) == 0
&& params[0].signum() >= 0;
}
@Override
public NumberInterface applyInternal(MutableEvaluationContext context, NumberInterface[] params) {
NumberImplementation implementation = context.getInheritedNumberImplementation();
if (params[0].signum() == 0) {
return implementation.instanceForString("1");
}
NumberInterface one = implementation.instanceForString("1");
NumberInterface factorial = params[0];
NumberInterface multiplier = params[0];
//It is necessary to later prevent calls of factorial on anything but non-negative integers.
while ((multiplier = multiplier.subtract(one)).signum() == 1) {
factorial = factorial.multiply(multiplier);
}
return factorial;
/*if(!storedList.containsKey(params[0].getClass())){
storedList.put(params[0].getClass(), new ArrayList<NumberInterface>());
storedList.get(params[0].getClass()).add(NaiveNumber.ONE.promoteTo(params[0].getClass()));
storedList.get(params[0].getClass()).add(NaiveNumber.ONE.promoteTo(params[0].getClass()));
}*/
}
};
public static final NumberOperator OP_FACTORIAL = new OperatorFactorial();
/**
* The permutation operator.
*/

32
core/src/main/kotlin/org/nwapw/abacus/plugin/standard/OperatorFactorial.kt Normal file
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@ -0,0 +1,32 @@
package org.nwapw.abacus.plugin.standard
import org.nwapw.abacus.context.MutableEvaluationContext
import org.nwapw.abacus.function.NumberOperator
import org.nwapw.abacus.function.OperatorAssociativity
import org.nwapw.abacus.function.OperatorType
import org.nwapw.abacus.number.NumberInterface
class OperatorFactorial: NumberOperator(OperatorAssociativity.LEFT, OperatorType.UNARY_POSTFIX, 0) {
override fun matchesParams(context: MutableEvaluationContext, params: Array<out NumberInterface>) =
params.size == 1
&& params[0].fractionalPart().compareTo(context.inheritedNumberImplementation.instanceForString("0")) == 0
&& params[0].signum() >= 0
override fun applyInternal(context: MutableEvaluationContext, params: Array<out NumberInterface>): NumberInterface {
val implementation = context.inheritedNumberImplementation
val one = implementation.instanceForString("1")
if (params[0].signum() == 0) {
return one
}
var factorial = params[0]
var multiplier = params[0] - one
//It is necessary to later prevent calls of factorial on anything but non-negative integers.
while (multiplier.signum() == 1) {
factorial *= multiplier
multiplier -= one
}
return factorial
}
}

17
core/src/main/kotlin/org/nwapw/abacus/plugin/standard/OperatorNegate.kt Normal file
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@ -0,0 +1,17 @@
package org.nwapw.abacus.plugin.standard
import org.nwapw.abacus.context.MutableEvaluationContext
import org.nwapw.abacus.function.NumberOperator
import org.nwapw.abacus.function.OperatorAssociativity
import org.nwapw.abacus.function.OperatorType
import org.nwapw.abacus.number.NumberInterface
class OperatorNegate: NumberOperator(OperatorAssociativity.LEFT, OperatorType.UNARY_PREFIX, 0) {
override fun matchesParams(context: MutableEvaluationContext, params: Array<out NumberInterface>) =
params.size == 1
override fun applyInternal(context: MutableEvaluationContext, params: Array<out NumberInterface>) =
-params[0]
}