本文整理了Java中ai.grakn.graql.QueryBuilder.parser方法的一些代码示例，展示了QueryBuilder.parser的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。QueryBuilder.parser方法的具体详情如下：
包路径：ai.grakn.graql.QueryBuilder
类名称：QueryBuilder
方法名：parser

QueryBuilder.parser介绍

[英]Get a QueryParser for parsing queries from strings
[中]获取用于解析字符串查询的QueryParser

代码示例

代码示例来源：origin: ai.grakn/grakn-graql

/**
 * Get a {@link QueryParser} for parsing queries from strings
 */
public static QueryParser parser() {
  return withoutGraph().parser();
}

代码示例来源：origin: ai.grakn/grakn-test-tools

public static void loadFromFile(GraknTx graph, String file) {
    File graql = new File(GraknSystemProperty.PROJECT_RELATIVE_DIR.value() + "/grakn-test-tools/src/main/graql/" + file);

    List<String> queries;
    try {
      queries = Files.readLines(graql, StandardCharsets.UTF_8);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }

    graph.graql().parser().parseList(queries.stream().collect(Collectors.joining("\n"))).forEach(Query::execute);
  }
}

代码示例来源：origin: ai.grakn/grakn-test-tools

@Override
protected void buildRules(GraknTx tx) {
  // These rules are totally made up for testing purposes and don't work!
  Pattern when = tx.graql().parser().parsePattern("$x has name 'expectation-when'");
  Pattern then = tx.graql().parser().parsePattern("$x has name 'expectation-then'");
  tx.putRule("expectation-rule", when, then);
  when = tx.graql().parser().parsePattern("$x has name 'materialize-when'");
  then = tx.graql().parser().parsePattern("$x has name 'materialize-then'");
  tx.putRule("materialize-rule", when, then);
}

代码示例来源：origin: ai.grakn/grakn-test-tools

@Override
  public void buildRules(GraknTx tx) {
    Pattern transitivity_LHS = tx.graql().parser().parsePattern("{(geo-entity: $x, entity-location: $y) isa is-located-in;" +
        "(geo-entity: $y, entity-location: $z) isa is-located-in;}");
    Pattern transitivity_RHS = tx.graql().parser().parsePattern("{(geo-entity: $x, entity-location: $z) isa is-located-in;}");
    tx.putRule("Geo Rule", transitivity_LHS, transitivity_RHS);
  }
}

代码示例来源：origin: ai.grakn/grakn-test-tools

@Override
protected Rule newSchemaConcept(Label label) {
  // TODO: generate more complicated rules
  QueryBuilder graql = this.tx().graql();
  return tx().putRule(label, graql.parser().parsePattern("$x"), graql.parser().parsePattern("$x"));
}

代码示例来源：origin: ai.grakn/grakn-test-tools

@Override
  protected BiFunction<GraknTx, Label, SchemaConcept> generate() {
    return random.choose(ImmutableList.of(
        GraknTx::putEntityType,
        (graph, label) -> graph.putAttributeType(label, gen(AttributeType.DataType.class)),
        GraknTx::putRelationshipType,
        GraknTx::putRole,
        //TODO: Make smarter rules
        (graph, label) -> graph.putRule(label, graph.graql().parser().parsePattern("$x"), graph.graql().parser().parsePattern("$x"))
    ));
  }
}

代码示例来源：origin: ai.grakn/grakn-kb

private Pattern parsePattern(String value){
  if(value == null) {
    return null;
  } else {
    return vertex().tx().graql().parser().parsePattern(value);
  }
}

代码示例来源：origin: ai.grakn/grakn-test-tools

Pattern R1_LHS = tx.graql().parser().parsePattern("{" +
        "$x isa person;$x has nationality 'American';" +
        "$y isa weapon;" +
Pattern R1_RHS = tx.graql().parser().parsePattern("{$x isa criminal;}");
tx.putRule("R1: It is a crime for an American to sell weapons to hostile nations" , R1_LHS, R1_RHS);
Pattern R2_LHS = tx.graql().parser().parsePattern("{$x isa missile;}");
Pattern R2_RHS = tx.graql().parser().parsePattern("{$x isa weapon;}");
tx.putRule("R2: Missiles are a kind of a weapon\"" , R2_LHS, R2_RHS);
Pattern R3_LHS = tx.graql().parser().parsePattern("{$x isa country;" +
    "($x, $y) isa is-enemy-of;" +
    "$y isa country;$y has name 'America';}");
Pattern R3_RHS = tx.graql().parser().parsePattern("{$x has alignment 'hostile';}");
tx.putRule("R3: If a country is an enemy of America then it is hostile" , R3_LHS, R3_RHS);
Pattern R4_LHS = tx.graql().parser().parsePattern("{$x isa rocket;$x has propulsion 'gsp';}");
Pattern R4_RHS = tx.graql().parser().parsePattern("{$x isa missile;}");
tx.putRule("R4: If a rocket is self-propelled and guided, it is a missile" , R4_LHS, R4_RHS);
Pattern R5_LHS = tx.graql().parser().parsePattern("{$x isa person;" +
    "$y isa country;" +
    "$z isa weapon;" +
Pattern R5_RHS = tx.graql().parser().parsePattern("{(seller: $x, buyer: $y, transaction-item: $z) isa transaction;}");
tx.putRule("R5: If a country pays a person and that country now owns a weapon then the person has sold the country a weapon" , R5_LHS, R5_RHS);