48 lines
1.1 KiB
Java
48 lines
1.1 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.rules.dsl.Pattern;
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import java.util.*;
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/**
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* Matches and generates any function as a named sub-function.
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*/
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public class SubFunctionPattern implements Pattern {
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private final String name;
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public SubFunctionPattern(final String name) {
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this.name = name;
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}
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@Override
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public Optional<Map<String, Function>> match(final Function function) {
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return Optional.of(Collections.singletonMap(name, function));
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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 subFunctions.get(name);
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}
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@Override
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public Set<SubFunctionPattern> getSubFunctions() {
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return Collections.singleton(this);
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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 SubFunctionPattern)) {
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return false;
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}
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final SubFunctionPattern other = (SubFunctionPattern) o;
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return name.equals(other.name);
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}
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@Override
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public int hashCode() {
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return Objects.hash(name);
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}
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}
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