Package org.restheart.mongodb.utils

Class VarsInterpolator

java.lang.Object

org.restheart.mongodb.utils.VarsInterpolator

public class VarsInterpolator
extends Object

Utility class for interpolating variables within a BsonDocument or BsonArray by using a specific format, such as { [operator]: "name"}, and replacing placeholders with provided values. The class facilitates the dynamic substitution of placeholders in BSON documents and arrays.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	VarsInterpolator.VAR_OPERATOR

Constructor Summary

Constructors

Constructor	Description
VarsInterpolator()

Method Summary

Modifier and Type	Method	Description
static org.bson.BsonValue	interpolate(VarsInterpolator.VAR_OPERATOR operator, org.bson.BsonValue bson, org.bson.BsonDocument values)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

VarsInterpolator

public VarsInterpolator()

Method Details

interpolate

public static org.bson.BsonValue interpolate(VarsInterpolator.VAR_OPERATOR operator,
 org.bson.BsonValue bson,
 org.bson.BsonDocument values)
                                      throws InvalidMetadataException,
QueryVariableNotBoundException

Parameters:

operator -

bson - the BsonDocument or BsonArray containing variables

values - the BsonDocument containing the values of the variables, as RequestContext.getAggregationVars()

Returns:

the BsonValue where the variables {"$var": "name" } or {"$var": [ "name", "defaultValue" ] } are replaced with the values defined in the avars BsonDocument

Example: if bson = {"$var": "name" } and avars = { "name": "Andrea"} then it returns {"$var": "Andrea" }

Throws:

InvalidMetadataException

QueryVariableNotBoundException