@neo4j/cypher-builder
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A programmatic API for building Cypher queries for Neo4j
88 lines (87 loc) • 4.27 kB
JavaScript
;
/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var Merge_1;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Merge = void 0;
const compile_cypher_if_exists_1 = require("../utils/compile-cypher-if-exists");
const Clause_1 = require("./Clause");
const WithCreate_1 = require("./mixins/clauses/WithCreate");
const WithFinish_1 = require("./mixins/clauses/WithFinish");
const WithReturn_1 = require("./mixins/clauses/WithReturn");
const WithWith_1 = require("./mixins/clauses/WithWith");
const WithDelete_1 = require("./mixins/sub-clauses/WithDelete");
const WithOrder_1 = require("./mixins/sub-clauses/WithOrder");
const WithSetRemove_1 = require("./mixins/sub-clauses/WithSetRemove");
const OnCreate_1 = require("./sub-clauses/OnCreate");
const OnMatch_1 = require("./sub-clauses/OnMatch");
const mixin_1 = require("./utils/mixin");
/**
* @see {@link https://neo4j.com/docs/cypher-manual/current/clauses/merge/ | Cypher Documentation}
* @group Clauses
*/
let Merge = Merge_1 = class Merge extends Clause_1.Clause {
constructor(pattern) {
super();
this.pattern = pattern;
this.onCreateClause = new OnCreate_1.OnCreate(this);
this.onMatchClause = new OnMatch_1.OnMatch(this);
}
onCreateSet(...onCreateParams) {
this.onCreateClause.addParams(...onCreateParams);
return this;
}
onMatchSet(...onMatchParams) {
this.onMatchClause.addParams(...onMatchParams);
return this;
}
/** Add a {@link Merge} clause
* @see {@link https://neo4j.com/docs/cypher-manual/current/clauses/merge/ | Cypher Documentation}
*/
merge(clauseOrPattern) {
if (clauseOrPattern instanceof Merge_1) {
this.addNextClause(clauseOrPattern);
return clauseOrPattern;
}
const matchClause = new Merge_1(clauseOrPattern);
this.addNextClause(matchClause);
return matchClause;
}
/** @internal */
getCypher(env) {
const mergeStr = `MERGE ${this.pattern.getCypher(env)}`;
const setCypher = this.compileSetCypher(env);
const onCreateCypher = (0, compile_cypher_if_exists_1.compileCypherIfExists)(this.onCreateClause, env, { prefix: "\n" });
const onMatchCypher = (0, compile_cypher_if_exists_1.compileCypherIfExists)(this.onMatchClause, env, { prefix: "\n" });
const deleteCypher = (0, compile_cypher_if_exists_1.compileCypherIfExists)(this.deleteClause, env, { prefix: "\n" });
const orderCypher = (0, compile_cypher_if_exists_1.compileCypherIfExists)(this.orderByStatement, env, { prefix: "\n" });
const nextClause = this.compileNextClause(env);
return `${mergeStr}${onMatchCypher}${onCreateCypher}${setCypher}${deleteCypher}${orderCypher}${nextClause}`;
}
};
exports.Merge = Merge;
exports.Merge = Merge = Merge_1 = __decorate([
(0, mixin_1.mixin)(WithReturn_1.WithReturn, WithSetRemove_1.WithSetRemove, WithDelete_1.WithDelete, WithWith_1.WithWith, WithCreate_1.WithCreate, WithFinish_1.WithFinish, WithOrder_1.WithOrder)
], Merge);