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‎src/njsJsContext.c‎

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// Copyright (c) 2025, Oracle and/or its affiliates.
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//-----------------------------------------------------------------------------
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//
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// This software is dual-licensed to you under the Universal Permissive License
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// (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
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// 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
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// either license.
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//
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// If you elect to accept the software under the Apache License, Version 2.0,
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// the following applies:
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// NAME
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// njsJsContext.c
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//
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// DESCRIPTION
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// Implementation of njsJsContext methods to call JS methods inside C.
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//
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//-----------------------------------------------------------------------------
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#include "njsModule.h"
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//-----------------------------------------------------------------------------
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// njsJsContext_populate()
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// Sets the JavaScript values on the njsContext structure. These are a number
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// of constructors and also the JavaScript object that is "this" for the method
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// that is currently being executed.
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//-----------------------------------------------------------------------------
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bool njsJsContext_populate(napi_env env, njsModuleGlobals *globals,
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njsJsContext *jsContext)
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{
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// acquire the LOB constructor
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsLobConstructor, &jsContext->jsLobConstructor))
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// acquire the result set constructor
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsResultSetConstructor,
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&jsContext->jsResultSetConstructor))
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// acquire the base database object constructor
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsDbObjectConstructor,
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&jsContext->jsDbObjectConstructor))
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// acquire the _getDateComponents() function
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsGetDateComponentsFn,
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&jsContext->jsGetDateComponentsFn))
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// acquire the _makeDate() function
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsMakeDateFn, &jsContext->jsMakeDateFn))
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// acquire the _decodeVector function
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsDecodeVectorFn, &jsContext->jsDecodeVectorFn))
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// acquire the _encodeVector function
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsEncodeVectorFn, &jsContext->jsEncodeVectorFn))
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// acquire the JsonId constructor
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsJsonIdConstructor, &jsContext->jsJsonIdConstructor))
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// acquire the SparseVector constructor
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsSparseVectorConstructor,
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&jsContext->jsSparseVectorConstructor))
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// acquire the IntervalYM constructor
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsIntervalYMConstructor,
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&jsContext->jsIntervalYMConstructor))
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// acquire the IntervalDS constructor
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NJS_CHECK_NAPI(env, napi_get_reference_value(env,
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globals->jsIntervalDSConstructor,
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&jsContext->jsIntervalDSConstructor))
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return true;
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}
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//-----------------------------------------------------------------------------
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// njsJsContext_getJsonNodeValue()
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// Return an appropriate JavaScript value for the JSON node.
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//-----------------------------------------------------------------------------
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bool njsJsContext_getJsonNodeValue(njsJsContext *jsContext, dpiJsonNode *node,
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napi_env env, napi_value *value)
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{
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napi_value key, temp;
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dpiJsonArray *array;
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dpiJsonObject *obj;
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void *destData = NULL;
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size_t byteLength = 0;
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double temp_double;
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uint32_t i;
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napi_value global, vectorBytes, arrBuf;
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// null is a special case
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if (node->nativeTypeNum == DPI_NATIVE_TYPE_NULL) {
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NJS_CHECK_NAPI(env, napi_get_null(env, value))
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return true;
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}
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// handle the other types supported in JSON nodes
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switch (node->oracleTypeNum) {
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case DPI_ORACLE_TYPE_JSON_ARRAY:
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array = &node->value->asJsonArray;
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NJS_CHECK_NAPI(env, napi_create_array_with_length(env,
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array->numElements, value))
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for (i = 0; i < array->numElements; i++) {
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if (!njsJsContext_getJsonNodeValue(jsContext, &array->elements[i],
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env, &temp))
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return false;
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NJS_CHECK_NAPI(env, napi_set_element(env, *value, i, temp))
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}
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return true;
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case DPI_ORACLE_TYPE_JSON_OBJECT:
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obj = &node->value->asJsonObject;
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NJS_CHECK_NAPI(env, napi_create_object(env, value))
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for (i = 0; i< obj->numFields; i++) {
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NJS_CHECK_NAPI(env, napi_create_string_utf8(env,
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obj->fieldNames[i], obj->fieldNameLengths[i], &key))
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if (!njsJsContext_getJsonNodeValue(jsContext, &obj->fields[i],
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env, &temp))
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return false;
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NJS_CHECK_NAPI(env, napi_set_property(env, *value, key, temp))
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}
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return true;
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case DPI_ORACLE_TYPE_VARCHAR:
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NJS_CHECK_NAPI(env, napi_create_string_utf8(env,
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node->value->asBytes.ptr, node->value->asBytes.length,
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value))
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return true;
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case DPI_ORACLE_TYPE_RAW:
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NJS_CHECK_NAPI(env, napi_create_buffer_copy(env,
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node->value->asBytes.length, node->value->asBytes.ptr,
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NULL, value))
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return true;
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case DPI_ORACLE_TYPE_NUMBER:
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temp_double = (node->nativeTypeNum == DPI_NATIVE_TYPE_DOUBLE) ?
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node->value->asDouble : node->value->asFloat;
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NJS_CHECK_NAPI(env, napi_create_double(env, temp_double, value))
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return true;
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case DPI_ORACLE_TYPE_DATE:
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case DPI_ORACLE_TYPE_TIMESTAMP:
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return njsUtils_getDateValue(node->oracleTypeNum, env,
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jsContext->jsMakeDateFn, &node->value->asTimestamp, value);
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return true;
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case DPI_ORACLE_TYPE_BOOLEAN:
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NJS_CHECK_NAPI(env, napi_get_boolean(env, node->value->asBoolean,
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value))
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return true;
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case DPI_ORACLE_TYPE_INTERVAL_YM:
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return njsJsContext_getIntervalYM(jsContext,
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&(node->value->asIntervalYM), env, value);
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case DPI_ORACLE_TYPE_INTERVAL_DS:
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return njsJsContext_getIntervalDS(jsContext,
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&(node->value->asIntervalDS), env, value);
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case DPI_ORACLE_TYPE_VECTOR:
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NJS_CHECK_NAPI(env, napi_get_global(env, &global))
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NJS_CHECK_NAPI(env, napi_create_buffer_copy(env,
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node->value->asBytes.length, node->value->asBytes.ptr,
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NULL, &vectorBytes))
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NJS_CHECK_NAPI(env, napi_call_function(env, global,
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jsContext->jsDecodeVectorFn, 1, &vectorBytes, value))
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return true;
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case DPI_ORACLE_TYPE_JSON_ID:
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byteLength = node->value->asBytes.length;
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NJS_CHECK_NAPI(env, napi_create_arraybuffer(env,
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byteLength, &destData, &arrBuf))
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memcpy(destData, node->value->asBytes.ptr, byteLength);
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NJS_CHECK_NAPI(env, napi_new_instance(env,
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jsContext->jsJsonIdConstructor, 1, &arrBuf, value))
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return true;
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default:
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break;
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}
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return njsUtils_throwUnsupportedDataTypeInJson(env,
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node->oracleTypeNum);
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}
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//-----------------------------------------------------------------------------
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// njsJsContext_getIntervalYM()
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// Returns the appropriate IntervalYM JavaScript object for the Interval
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// year-to-month type. At this point it is known that the Javascript
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// attributes are integers and that the variable can support it.
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//-----------------------------------------------------------------------------
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bool njsJsContext_getIntervalYM(njsJsContext *jsContext, dpiIntervalYM *data,
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napi_env env, napi_value *value)
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{
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napi_value temp, intervalYMTempObj;
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NJS_CHECK_NAPI(env, napi_create_object(env, &intervalYMTempObj))
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NJS_CHECK_NAPI(env, napi_create_int32(env, data->years, &temp))
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NJS_CHECK_NAPI(env, napi_set_named_property(env, intervalYMTempObj,
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"years", temp))
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NJS_CHECK_NAPI(env, napi_create_int32(env, data->months, &temp))
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NJS_CHECK_NAPI(env, napi_set_named_property(env, intervalYMTempObj,
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"months", temp))
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NJS_CHECK_NAPI(env, napi_new_instance(env,
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jsContext->jsIntervalYMConstructor, 1, &intervalYMTempObj, value))
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return true;
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}
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//-----------------------------------------------------------------------------
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// njsJsContext_getIntervalDS()
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// Returns the appropriate IntervalDS JavaScript object for the Interval
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// day-to-second type. At this point it is known that the Javascript
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// attributes are integers and that the variable can support it.
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//-----------------------------------------------------------------------------
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bool njsJsContext_getIntervalDS(njsJsContext *jsContext, dpiIntervalDS *data,
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napi_env env, napi_value *value)
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{
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napi_value temp, intervalDSTempObj;
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NJS_CHECK_NAPI(env, napi_create_object(env, &intervalDSTempObj))
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NJS_CHECK_NAPI(env, napi_create_int32(env, data->days, &temp))
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NJS_CHECK_NAPI(env, napi_set_named_property(env, intervalDSTempObj,
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"days", temp))
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NJS_CHECK_NAPI(env, napi_create_int32(env, data->hours, &temp))
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NJS_CHECK_NAPI(env, napi_set_named_property(env, intervalDSTempObj,
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"hours", temp))
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NJS_CHECK_NAPI(env, napi_create_int32(env, data->minutes, &temp))
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NJS_CHECK_NAPI(env, napi_set_named_property(env, intervalDSTempObj,
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"minutes", temp))
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NJS_CHECK_NAPI(env, napi_create_int32(env, data->seconds, &temp))
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NJS_CHECK_NAPI(env, napi_set_named_property(env, intervalDSTempObj,
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"seconds", temp))
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NJS_CHECK_NAPI(env, napi_create_int32(env, data->fseconds, &temp))
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NJS_CHECK_NAPI(env, napi_set_named_property(env, intervalDSTempObj,
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"fseconds", temp))
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NJS_CHECK_NAPI(env, napi_new_instance(env,
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jsContext->jsIntervalDSConstructor, 1, &intervalDSTempObj, value))
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return true;
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}

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