{
  "code": null,
  "collection": "architecture",
  "href": "https://banes-lab.com/ontology#architecture-memento-pattern",
  "id": "memento-pattern",
  "kind": "pattern",
  "layer": {
    "href": "https://banes-lab.com/ontology/schema#layer-design-patterns-core",
    "json": "https://banes-lab.com/json/records/layer/design-patterns-core",
    "label": "Design Patterns Core",
    "markdown": "https://banes-lab.com/records/layer/design-patterns-core.md",
    "ref": "layer:design-patterns-core"
  },
  "name": "Memento Pattern",
  "ref": "architecture:memento-pattern",
  "relations": [
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-encapsulation",
          "json": "https://banes-lab.com/json/records/architecture/encapsulation",
          "label": "Encapsulation",
          "markdown": "https://banes-lab.com/records/architecture/encapsulation.md",
          "ref": "architecture:encapsulation"
        }
      ],
      "relation": "requires"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-information-hiding",
          "json": "https://banes-lab.com/json/records/architecture/information-hiding",
          "label": "Information Hiding",
          "markdown": "https://banes-lab.com/records/architecture/information-hiding.md",
          "ref": "architecture:information-hiding"
        }
      ],
      "relation": "reinforces"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-undo-redo",
          "json": "https://banes-lab.com/json/records/lexicon/undo-redo",
          "label": "Undo/Redo",
          "markdown": "https://banes-lab.com/records/lexicon/undo-redo.md",
          "ref": "lexicon:undo-redo"
        },
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-snapshot-restore",
          "json": "https://banes-lab.com/json/records/lexicon/snapshot-restore",
          "label": "Snapshot/Restore",
          "markdown": "https://banes-lab.com/records/lexicon/snapshot-restore.md",
          "ref": "lexicon:snapshot-restore"
        }
      ],
      "relation": "enables"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-external-state-reach-in",
          "json": "https://banes-lab.com/json/records/lexicon/external-state-reach-in",
          "label": "External State Reach-In",
          "markdown": "https://banes-lab.com/records/lexicon/external-state-reach-in.md",
          "ref": "lexicon:external-state-reach-in"
        }
      ],
      "relation": "conflicts-with"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-memory-footprint",
          "json": "https://banes-lab.com/json/records/lexicon/memory-footprint",
          "label": "Memory Footprint",
          "markdown": "https://banes-lab.com/records/lexicon/memory-footprint.md",
          "ref": "lexicon:memory-footprint"
        }
      ],
      "relation": "tensions-with"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/schema#tension-memento-pattern-memory-footprint",
          "json": "https://banes-lab.com/json/records/tension/memento-pattern-memory-footprint",
          "label": "Memento Pattern / Memory Footprint",
          "markdown": "https://banes-lab.com/records/tension/memento-pattern-memory-footprint.md",
          "ref": "tension:memento-pattern-memory-footprint"
        }
      ],
      "relation": "tensions"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-external-state-reach-in",
          "json": "https://banes-lab.com/json/records/lexicon/external-state-reach-in",
          "label": "External State Reach-In",
          "markdown": "https://banes-lab.com/records/lexicon/external-state-reach-in.md",
          "ref": "lexicon:external-state-reach-in"
        }
      ],
      "relation": "violated-by"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/schema#vocabulary-severity-contextual",
          "json": "https://banes-lab.com/json/records/vocabulary/severity-contextual",
          "label": "contextual",
          "markdown": "https://banes-lab.com/records/vocabulary/severity-contextual.md",
          "ref": "vocabulary:severity-contextual"
        }
      ],
      "relation": "severity"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-category-behavioral-patterns",
          "json": "https://banes-lab.com/json/records/architecture-category/behavioral-patterns",
          "label": "Behavioral Patterns",
          "markdown": "https://banes-lab.com/records/architecture-category/behavioral-patterns.md",
          "ref": "architecture-category:behavioral-patterns"
        }
      ],
      "relation": "category"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/anatomy/governance#file-governance-rules-eslint-require-snapshot-coverage-eslint-rule-ts",
          "json": "https://banes-lab.com/json/source/governance/rules/eslint/require-snapshot-coverage.eslint.rule.ts",
          "label": "rules/eslint/require-snapshot-coverage.eslint.rule.ts",
          "markdown": "https://banes-lab.com/source/governance/rules/eslint/require-snapshot-coverage.eslint.rule.ts.md",
          "ref": "anatomy:file-governance-rules-eslint-require-snapshot-coverage-eslint-rule-ts"
        }
      ],
      "relation": "enforced-by"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/software-architecture/principles#execution-joins-the-halves",
          "json": "https://banes-lab.com/json/software-architecture/principles/execution-joins-the-halves",
          "label": "Execution joins the halves",
          "markdown": "https://banes-lab.com/software-architecture/principles/execution-joins-the-halves.md",
          "ref": "chapter:/software-architecture/principles#execution-joins-the-halves"
        },
        {
          "href": "https://banes-lab.com/ontology#architecture-category-core-modular-design",
          "json": "https://banes-lab.com/json/ontology/principles/architecture-category-core-modular-design",
          "label": "Core Modular Design",
          "markdown": "https://banes-lab.com/ontology/principles/architecture-category-core-modular-design.md",
          "ref": "chapter:/ontology#architecture-category-core-modular-design"
        },
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-category-behavioral-patterns",
          "json": "https://banes-lab.com/json/ontology/lexicon/lexicon-category-behavioral-patterns",
          "label": "Behavioral Patterns",
          "markdown": "https://banes-lab.com/ontology/lexicon/lexicon-category-behavioral-patterns.md",
          "ref": "chapter:/ontology/lexicon#lexicon-category-behavioral-patterns"
        },
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-category-core-vocabulary",
          "json": "https://banes-lab.com/json/ontology/lexicon/lexicon-category-core-vocabulary",
          "label": "Core Vocabulary",
          "markdown": "https://banes-lab.com/ontology/lexicon/lexicon-category-core-vocabulary.md",
          "ref": "chapter:/ontology/lexicon#lexicon-category-core-vocabulary"
        },
        {
          "href": "https://banes-lab.com/ontology/schema#the-vocabulary-severity",
          "json": "https://banes-lab.com/json/ontology/schema/the-vocabulary-severity",
          "label": "Severity levels",
          "markdown": "https://banes-lab.com/ontology/schema/the-vocabulary-severity.md",
          "ref": "chapter:/ontology/schema#the-vocabulary-severity"
        },
        {
          "href": "https://banes-lab.com/ontology/schema#the-resolutions",
          "json": "https://banes-lab.com/json/ontology/schema/the-resolutions",
          "label": "The resolutions",
          "markdown": "https://banes-lab.com/ontology/schema/the-resolutions.md",
          "ref": "chapter:/ontology/schema#the-resolutions"
        }
      ],
      "relation": "linked-from"
    }
  ],
  "summary": "A design pattern in which an object captures its own state in an opaque snapshot it can later restore.",
  "siblings": {
    "next": {
      "href": "https://banes-lab.com/ontology#architecture-null-object-pattern",
      "json": "https://banes-lab.com/json/records/architecture/null-object-pattern",
      "label": "Null Object Pattern",
      "markdown": "https://banes-lab.com/records/architecture/null-object-pattern.md",
      "ref": "architecture:null-object-pattern"
    },
    "previous": {
      "href": "https://banes-lab.com/ontology#architecture-visitor-pattern",
      "json": "https://banes-lab.com/json/records/architecture/visitor-pattern",
      "label": "Visitor Pattern",
      "markdown": "https://banes-lab.com/records/architecture/visitor-pattern.md",
      "ref": "architecture:visitor-pattern"
    }
  },
  "up": {
    "href": null,
    "json": "https://banes-lab.com/json/api/records/architecture",
    "label": "Architecture principles",
    "markdown": "https://banes-lab.com/api/records/architecture.md",
    "ref": "api:records/architecture"
  },
  "aliases": [],
  "exemplar": {
    "after": "class FooMemento { constructor(readonly snapshot: Readonly<Foo>) {} }\nconst memento = foo.save();\nfoo.rename(newName);\nif (canceled) foo.restore(memento);",
    "before": "const backupName = foo.name;\nconst backupTags = [...foo.tags];\nfoo.rename(newName);\nif (canceled) { foo.name = backupName; foo.tags = backupTags; }",
    "lang": "ts",
    "medium": "code"
  },
  "formedBy": null,
  "scope": [
    "behavior",
    "state capture",
    "history"
  ],
  "severity": "contextual"
}