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/*
* Copyright 2008-present MongoDB, Inc.
*
* 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.
*/
package org.bson;
import org.bson.types.Decimal128;
import org.bson.types.ObjectId;
/**
* A callback interface for describing the structure of a BSON document. Implementations of this define how to turn BSON read from MongoDB
* into Java objects.
*
* See the BSON Spec.
*/
public interface BSONCallback {
/**
* Signals the start of a BSON document, which usually maps onto some Java object.
*
* @mongodb.driver.manual core/document/ MongoDB Documents
*/
void objectStart();
/**
* Signals the start of a BSON document, which usually maps onto some Java object.
*
* @param name the field name of the document.
* @mongodb.driver.manual core/document/ MongoDB Documents
*/
void objectStart(String name);
/**
* Called at the end of the document/array, and returns this object.
*
* @return the Object that has been read from this section of the document.
*/
Object objectDone();
/**
* Resets the callback, clearing all state.
*/
void reset();
/**
* Returns the finished top-level Document.
*
* @return the top level document read from the database.
*/
Object get();
/**
* Factory method for BSONCallbacks.
*
* @return a new BSONCallback.
*/
BSONCallback createBSONCallback();
/**
* Signals the start of a BSON array.
*
* @mongodb.driver.manual tutorial/query-documents/#read-operations-arrays Arrays
*/
void arrayStart();
/**
* Signals the start of a BSON array, with its field name.
*
* @param name the name of this array field
* @mongodb.driver.manual tutorial/query-documents/#read-operations-arrays Arrays
*/
void arrayStart(String name);
/**
* Called the end of the array, and returns the completed array.
*
* @return an Object representing the array that has been read from this section of the document.
*/
Object arrayDone();
/**
* Called when reading a BSON field that exists but has a null value.
*
* @param name the name of the field
* @see org.bson.BsonType#NULL
*/
void gotNull(String name);
/**
* Called when reading a field with a {@link org.bson.BsonType#UNDEFINED} value.
*
* @param name the name of the field
* @see org.bson.BsonType#UNDEFINED
*/
void gotUndefined(String name);
/**
* Called when reading a field with a {@link org.bson.BsonType#MIN_KEY} value.
*
* @param name the name of the field
*/
void gotMinKey(String name);
/**
* Called when reading a field with a {@link org.bson.BsonType#MAX_KEY} value.
*
* @param name the name of the field
*/
void gotMaxKey(String name);
/**
* Called when reading a field with a {@link org.bson.BsonType#BOOLEAN} value.
*
* @param name the name of the field
* @param value the field's value
*/
void gotBoolean(String name, boolean value);
/**
* Called when reading a field with a {@link org.bson.BsonType#DOUBLE} value.
*
* @param name the name of the field
* @param value the field's value
*/
void gotDouble(String name, double value);
/**
* Called when reading a field with a {@link org.bson.BsonType#DECIMAL128} value.
*
* @param name the field name
* @param value the Decimal128 field value
* @since 3.4
* @mongodb.server.release 3.4
*/
void gotDecimal128(String name, Decimal128 value);
/**
* Called when reading a field with a {@link org.bson.BsonType#INT32} value.
*
* @param name the name of the field
* @param value the field's value
*/
void gotInt(String name, int value);
/**
* Called when reading a field with a {@link org.bson.BsonType#INT64} value.
*
* @param name the name of the field
* @param value the field's value
*/
void gotLong(String name, long value);
/**
* Called when reading a field with a {@link org.bson.BsonType#DATE_TIME} value.
*
* @param name the name of the field
* @param millis the date and time in milliseconds
*/
void gotDate(String name, long millis);
/**
* Called when reading a field with a {@link org.bson.BsonType#STRING} value.
*
* @param name the name of the field
* @param value the field's value
*/
void gotString(String name, String value);
/**
* Called when reading a field with a {@link org.bson.BsonType#SYMBOL} value.
*
* @param name the name of the field
* @param value the field's value
*/
void gotSymbol(String name, String value);
/**
* Called when reading a field with a {@link org.bson.BsonType#REGULAR_EXPRESSION} value.
*
* @param name the name of the field
* @param pattern the regex pattern
* @param flags the optional flags for the regular expression
* @mongodb.driver.manual reference/operator/query/regex/ $regex
*/
void gotRegex(String name, String pattern, String flags);
/**
* Called when reading a field with a {@link org.bson.BsonType#TIMESTAMP} value.
*
* @param name the name of the field
* @param time the time in seconds since epoch
* @param increment an incrementing ordinal for operations within a given second
* @mongodb.driver.manual reference/bson-types/#timestamps Timestamps
*/
void gotTimestamp(String name, int time, int increment);
/**
* Called when reading a field with a {@link org.bson.BsonType#OBJECT_ID} value.
*
* @param name the name of the field
* @param id the object ID
*/
void gotObjectId(String name, ObjectId id);
/**
* Invoked when {@link org.bson.BSONDecoder} encountered a {@link org.bson.BsonType#DB_POINTER} type field in a byte sequence.
*
* @param name the name of the field
* @param namespace the namespace to which reference is pointing to
* @param id the if of the object to which reference is pointing to
*/
void gotDBRef(String name, String namespace, ObjectId id);
/**
* This method is not used.
*
* @param name the name of the field
* @param data the field's value
* @deprecated this method is no longer called by the decoder
*/
@Deprecated
void gotBinaryArray(String name, byte[] data);
/**
* Called when reading a field with a {@link org.bson.BsonType#BINARY} value. Note that binary values have a subtype, which may
* determine how the value is processed.
*
* @param name the name of the field
* @param type one of the binary subtypes: {@link org.bson.BsonBinarySubType}
* @param data the field's value
*/
void gotBinary(String name, byte type, byte[] data);
/**
* Called when reading a field with a {@link java.util.UUID} value. This is a binary value of subtype
* {@link org.bson.BsonBinarySubType#UUID_LEGACY}
*
* @param name the name of the field
* @param part1 the first part of the UUID
* @param part2 the second part of the UUID
*/
void gotUUID(String name, long part1, long part2);
/**
* Called when reading a field with a {@link org.bson.BsonType#JAVASCRIPT} value.
*
* @param name the name of the field
* @param code the JavaScript code
*/
void gotCode(String name, String code);
/**
* Called when reading a field with a {@link org.bson.BsonType#JAVASCRIPT_WITH_SCOPE} value.
*
* @param name the name of the field
* @param code the JavaScript code
* @param scope a document representing the scope for the code
*/
void gotCodeWScope(String name, String code, Object scope);
}
