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Merge pull request #2879 from levBagryansky/2836_cage-stackoverflow
2836 cage stackoverflow
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147 changes: 147 additions & 0 deletions
147
eo-runtime/src/main/java/org/eolang/PhTracedEnclosure.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| /* | ||
| * The MIT License (MIT) | ||
| * | ||
| * Copyright (c) 2016-2024 Objectionary.com | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included | ||
| * in all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
| package org.eolang; | ||
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| import java.util.HashSet; | ||
| import java.util.Set; | ||
| import java.util.function.Supplier; | ||
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| /** | ||
| * Class to trace if the cage got into recursion during the dataization. | ||
| * @since 0.36 | ||
| * @todo #2836:60min Add a new parameter of recursion depth. This parameter | ||
| * should be set by user via pom.xml. We can make DATAIZING_CAGES a | ||
| * Map and count how many times the cage was met. | ||
| * @todo #2836:60min Make the class thread safe. It has private static | ||
| * field which can be accessed from differ thread and is not thread safe. | ||
| * Needs to synchronize this field. | ||
| */ | ||
| @Versionized | ||
| public final class PhTracedEnclosure implements Phi { | ||
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| /** | ||
| * Cages that are currently dataizing. If one cage is datazing and | ||
| * it needs to be dataized inside current dataizing, the cage will be here. | ||
| */ | ||
| private static final Set<Integer> DATAIZING_CAGES = new HashSet<>(); | ||
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| /** | ||
| * Enclosure. | ||
| */ | ||
| private final Phi enclosure; | ||
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| /** | ||
| * Vertex of cage where the {@link PhTracedEnclosure#enclosure} | ||
| * was retrieved. | ||
| */ | ||
| private final int cage; | ||
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| /** | ||
| * Ctor. | ||
| * @param enclosure Enclosure. | ||
| * @param cage Vertex of source cage. | ||
| */ | ||
| public PhTracedEnclosure(final Phi enclosure, final int cage) { | ||
| this.enclosure = enclosure; | ||
| this.cage = cage; | ||
| } | ||
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| @Override | ||
| public Phi copy() { | ||
| return new PhTracedEnclosure(this.enclosure.copy(), this.cage); | ||
| } | ||
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| @Override | ||
| public String locator() { | ||
| return this.enclosure.locator(); | ||
| } | ||
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| @Override | ||
| public String forma() { | ||
| return this.enclosure.forma(); | ||
| } | ||
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| @Override | ||
| public String φTerm() { | ||
| return this.enclosure.φTerm(); | ||
| } | ||
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| @Override | ||
| public Attr attr(final int pos) { | ||
| return new PhTracedEnclosure.TracingWhileGetting( | ||
| () -> this.enclosure.attr(pos) | ||
| ).get(); | ||
| } | ||
|
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| @Override | ||
| public Attr attr(final String name) { | ||
| return new PhTracedEnclosure.TracingWhileGetting( | ||
| () -> this.enclosure.attr(name) | ||
| ).get(); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return this.enclosure.hashCode(); | ||
| } | ||
|
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| @Override | ||
| public boolean equals(final Object obj) { | ||
| return obj instanceof Phi && this.hashCode() == obj.hashCode(); | ||
| } | ||
|
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| /** | ||
| * Supplier that traces the cage while gets. | ||
| * @since 0.36 | ||
| */ | ||
| private final class TracingWhileGetting implements Supplier<Attr> { | ||
|
|
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| /** | ||
| * Supplies the {@link Attr}. | ||
| */ | ||
| private final Supplier<Attr> attr; | ||
|
|
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| /** | ||
| * Ctor. | ||
| * @param attr Supplier of the {@link Attr}. | ||
| */ | ||
| private TracingWhileGetting(final Supplier<Attr> attr) { | ||
| this.attr = attr; | ||
| } | ||
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| @Override | ||
| public Attr get() { | ||
| if (PhTracedEnclosure.DATAIZING_CAGES.contains(PhTracedEnclosure.this.cage)) { | ||
| throw new ExFailure( | ||
| "The cage %s is already dataizing", | ||
| PhTracedEnclosure.this.cage | ||
| ); | ||
| } | ||
| PhTracedEnclosure.DATAIZING_CAGES.add(PhTracedEnclosure.this.cage); | ||
| final Attr ret = this.attr.get(); | ||
| PhTracedEnclosure.DATAIZING_CAGES.remove(PhTracedEnclosure.this.cage); | ||
| return ret; | ||
| } | ||
| } | ||
| } |
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7b604a8There was a problem hiding this comment.
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Puzzle
2836-3ac29bfbdiscovered ineo-runtime/src/main/java/org/eolang/PhTracedEnclosure.java) and submitted as #2890. Please, remember that the puzzle was not necessarily added in this particular commit. Maybe it was added earlier, but we discovered it only now.7b604a8There was a problem hiding this comment.
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Puzzle
2836-88180ad7discovered ineo-runtime/src/main/java/org/eolang/PhTracedEnclosure.java) and submitted as #2891. Please, remember that the puzzle was not necessarily added in this particular commit. Maybe it was added earlier, but we discovered it only now.