54 lines
1.2 KiB
Java
54 lines
1.2 KiB
Java
package it.cavallium.warppi.math.rules.dsl.patterns;
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import it.cavallium.warppi.math.Function;
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import it.cavallium.warppi.math.MathContext;
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import it.cavallium.warppi.math.functions.Number;
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import it.cavallium.warppi.math.rules.dsl.VisitorPattern;
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import java.math.BigDecimal;
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import java.util.*;
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/**
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* Matches and generates a specific number.
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*/
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public class NumberPattern extends VisitorPattern {
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private final BigDecimal value;
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public NumberPattern(final BigDecimal value) {
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this.value = value;
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}
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@Override
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public Optional<Map<String, Function>> visit(final Number number) {
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if (number.getTerm().compareTo(value) == 0) {
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return Optional.of(Collections.emptyMap());
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} else {
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return Optional.empty();
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}
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}
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@Override
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public Function replace(final MathContext mathContext, final Map<String, Function> subFunctions) {
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return new Number(mathContext, value);
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}
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@Override
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public Set<SubFunctionPattern> getSubFunctions() {
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return Collections.emptySet();
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}
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@Override
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public boolean equals(final Object o) {
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if (!(o instanceof NumberPattern)) {
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return false;
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}
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final NumberPattern other = (NumberPattern) o;
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return value.compareTo(other.value) == 0;
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}
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@Override
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public int hashCode() {
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return Objects.hash(value);
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}
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}
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