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arangodb/js/common/modules/@arangodb/arango-statement-common.js

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JavaScript

/*jshint strict: false */
////////////////////////////////////////////////////////////////////////////////
/// @brief Arango statements
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2012 triagens GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Jan Steemann
/// @author Copyright 2012, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
/// @brief constructor
////////////////////////////////////////////////////////////////////////////////
function ArangoStatement (database, data) {
this._database = database;
this._doCount = false;
this._batchSize = null;
this._bindVars = {};
this._options = undefined;
this._cache = undefined;
if (! data) {
throw "ArangoStatement needs initial data";
}
if (typeof data === "string") {
data = { query: data };
}
else if (typeof data === 'object' && typeof data.toAQL === 'function') {
data = { query: data.toAQL() };
}
if (! (data instanceof Object)) {
throw "ArangoStatement needs initial data";
}
if (data.query === undefined || data.query === "") {
throw "ArangoStatement needs a valid query attribute";
}
this.setQuery(data.query);
if (data.bindVars instanceof Object) {
this.bind(data.bindVars);
}
if (data.options instanceof Object) {
this.setOptions(data.options);
}
if (data.count !== undefined) {
this.setCount(data.count);
}
if (data.batchSize !== undefined) {
this.setBatchSize(data.batchSize);
}
if (data.cache !== undefined) {
this.setCache(data.cache);
}
}
////////////////////////////////////////////////////////////////////////////////
/// @brief binds a parameter to the statement
///
/// This function can be called multiple times, once for each bind parameter.
/// All bind parameters will be transferred to the server in one go when
/// execute() is called.
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.bind = function (key, value) {
if (key instanceof Object) {
if (value !== undefined) {
throw "invalid bind parameter declaration";
}
this._bindVars = key;
}
else if (typeof(key) === "string") {
this._bindVars[key] = value;
}
else if (typeof(key) === "number") {
var strKey = String(parseInt(key, 10));
if (strKey !== String(key)) {
throw "invalid bind parameter declaration";
}
this._bindVars[strKey] = value;
}
else {
throw "invalid bind parameter declaration";
}
};
////////////////////////////////////////////////////////////////////////////////
/// @brief returns the bind variables already set
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.getBindVariables = function () {
return this._bindVars;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief gets the cache flag for the statement
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.getCache = function () {
return this._cache;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief gets the count flag for the statement
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.getCount = function () {
return this._doCount;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief gets the maximum number of results documents the cursor will return
/// in a single server roundtrip.
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.getBatchSize = function () {
return this._batchSize;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief gets the user options
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.getOptions = function () {
return this._options;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief gets query string
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.getQuery = function () {
return this._query;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief sets the cache flag for the statement
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.setCache = function (bool) {
this._cache = bool ? true : false;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief sets the count flag for the statement
///
/// Setting the count flag will make the statement's result cursor return the
/// total number of result documents. The count flag is not set by default.
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.setCount = function (bool) {
this._doCount = bool ? true : false;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief sets the maximum number of results documents the cursor will return
/// in a single server roundtrip.
/// The higher this number is, the less server roundtrips will be made when
/// iterating over the result documents of a cursor.
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.setBatchSize = function (value) {
var batch = parseInt(value, 10);
if (batch > 0) {
this._batchSize = batch;
}
};
////////////////////////////////////////////////////////////////////////////////
/// @brief sets the user options
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.setOptions = function (value) {
this._options = value;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief sets the query string
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.setQuery = function (query) {
this._query = (query && typeof query.toAQL === 'function') ? query.toAQL() : query;
};
////////////////////////////////////////////////////////////////////////////////
/// @brief parses a query and return the results
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.parse = function () {
throw "cannot call abstract method parse()";
};
////////////////////////////////////////////////////////////////////////////////
/// @brief explains a query and return the results
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.explain = function () {
throw "cannot call abstract method explain()";
};
////////////////////////////////////////////////////////////////////////////////
/// @brief executes the query
///
/// Invoking execute() will transfer the query and all bind parameters to the
/// server. It will return a cursor with the query results in case of success.
/// In case of an error, the error will be printed
////////////////////////////////////////////////////////////////////////////////
ArangoStatement.prototype.execute = function () {
throw "cannot call abstract method execute()";
};
exports.ArangoStatement = ArangoStatement;