54 lines
1.5 KiB
Plaintext
54 lines
1.5 KiB
Plaintext
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/**
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* @filedescription Merge Strategy
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*/
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"use strict";
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//-----------------------------------------------------------------------------
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// Class
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//-----------------------------------------------------------------------------
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/**
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* Container class for several different merge strategies.
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*/
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class MergeStrategy {
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/**
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* Merges two keys by overwriting the first with the second.
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* @param {*} value1 The value from the first object key.
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* @param {*} value2 The value from the second object key.
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* @returns {*} The second value.
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*/
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static overwrite(value1, value2) {
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return value2;
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}
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/**
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* Merges two keys by replacing the first with the second only if the
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* second is defined.
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* @param {*} value1 The value from the first object key.
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* @param {*} value2 The value from the second object key.
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* @returns {*} The second value if it is defined.
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*/
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static replace(value1, value2) {
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if (typeof value2 !== "undefined") {
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return value2;
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}
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return value1;
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}
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/**
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* Merges two properties by assigning properties from the second to the first.
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* @param {*} value1 The value from the first object key.
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* @param {*} value2 The value from the second object key.
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* @returns {*} A new object containing properties from both value1 and
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* value2.
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*/
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static assign(value1, value2) {
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return Object.assign({}, value1, value2);
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}
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}
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exports.MergeStrategy = MergeStrategy;
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