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Work in progress to have single ObjectComparator calling back to new …
…APIs.
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76 changes: 76 additions & 0 deletions
76
std-bits/base/src/main/java/org/enso/base/polyglot/EnsoObjectWrapper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| package org.enso.base.polyglot; | ||
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|
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| import org.enso.base.ObjectComparator; | ||
| import org.graalvm.polyglot.Context; | ||
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| import java.util.function.BiFunction; | ||
| import java.util.function.Function; | ||
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| public class EnsoObjectWrapper implements Comparable<EnsoObjectWrapper> { | ||
| private static Function<Object, Integer> EnsoHashCodeCallback = null; | ||
| private static BiFunction<Object, Object, Boolean> EnsoAreEqualCallback = null; | ||
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| private static void initCallbacks() { | ||
| if (EnsoHashCodeCallback == null) { | ||
| var module = Context.getCurrent().getBindings("enso").invokeMember("get_module", "Standard.Base.Data.Ordering"); | ||
| var type = module.invokeMember("get_type", "Comparable"); | ||
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| var hash_callback = module.invokeMember("get_method", type, "hash_callback"); | ||
| EnsoHashCodeCallback = v -> { | ||
| var result = hash_callback.execute(null, v); | ||
| if (result.isNull()) { | ||
| throw new IllegalStateException("Unable to object hash in EnsoObjectWrapper for " + v.toString()); | ||
| } else { | ||
| return result.asInt(); | ||
| } | ||
| }; | ||
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| var are_equal = module.invokeMember("get_method", type, "compare_callback"); | ||
| EnsoAreEqualCallback = (v, u) -> { | ||
| var result = are_equal.execute(null, v, u); | ||
| return !result.isNull() && result.asInt() == 0; | ||
| }; | ||
| } | ||
| } | ||
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| private static int getEnsoHashCode(Object value) { | ||
| initCallbacks(); | ||
| return EnsoHashCodeCallback.apply(value); | ||
| } | ||
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| private static boolean areEqual(Object value, Object other) { | ||
| initCallbacks(); | ||
| return EnsoAreEqualCallback.apply(value, other); | ||
| } | ||
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| private final Object value; | ||
| private final int ensoHashCode; | ||
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| public EnsoObjectWrapper(Object value) { | ||
| this.value = value; | ||
| this.ensoHashCode = getEnsoHashCode(value); | ||
| } | ||
|
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| public Object getValue() { | ||
| return value; | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return ensoHashCode; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object obj) { | ||
| if (obj instanceof EnsoObjectWrapper that) { | ||
| return areEqual(this.value, that.value); | ||
| } else { | ||
| return false; | ||
| } | ||
| } | ||
|
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| @Override | ||
| public int compareTo(EnsoObjectWrapper o) { | ||
| return ObjectComparator.ensoCompare(this.value, o.value); | ||
| } | ||
| } |
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