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cdt_context.go
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cdt_context.go
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// Copyright 2014-2019 Aerospike, Inc.
//
// Portions may be licensed to Aerospike, Inc. under one or more contributor
// license agreements WHICH ARE COMPATIBLE WITH THE APACHE LICENSE, VERSION 2.0.
//
// 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 aerospike
const (
ctxTypeListIndex = 0x10
ctxTypeListRank = 0x11
ctxTypeListValue = 0x13
ctxTypeMapIndex = 0x20
ctxTypeMapRank = 0x21
ctxTypeMapKey = 0x22
ctxTypeMapValue = 0x23
)
// CDTContext defines Nested CDT context. Identifies the location of nested list/map to apply the operation.
// for the current level.
// An array of CTX identifies location of the list/map on multiple
// levels on nesting.
type CDTContext struct {
id int
value Value
}
func (ctx *CDTContext) pack(cmd BufferEx) (int, error) {
size := 0
sz, err := packAInt64(cmd, int64(ctx.id))
size += sz
if err != nil {
return size, err
}
sz, err = ctx.value.pack(cmd)
size += sz
return size, err
}
// cdtContextList is used in FilterExpression API
type cdtContextList []*CDTContext
func (ctxl cdtContextList) pack(cmd BufferEx) (int, error) {
size := 0
for i := range ctxl {
sz, err := ctxl[i].pack(cmd)
size += sz
if err != nil {
return size, err
}
}
return size, nil
}
// CtxListIndex defines Lookup list by index offset.
// If the index is negative, the resolved index starts backwards from end of list.
// If an index is out of bounds, a parameter error will be returned.
// Examples:
// 0: First item.
// 4: Fifth item.
// -1: Last item.
// -3: Third to last item.
func CtxListIndex(index int) *CDTContext {
return &CDTContext{ctxTypeListIndex, IntegerValue(index)}
}
// CtxListIndexCreate list with given type at index offset, given an order and pad.
func CtxListIndexCreate(index int, order ListOrderType, pad bool) *CDTContext {
return &CDTContext{ctxTypeListIndex | cdtListOrderFlag(order, pad), IntegerValue(index)}
}
// CtxListRank defines Lookup list by rank.
// 0 = smallest value
// N = Nth smallest value
// -1 = largest value
func CtxListRank(rank int) *CDTContext {
return &CDTContext{ctxTypeListRank, IntegerValue(rank)}
}
// CtxListValue defines Lookup list by value.
func CtxListValue(key Value) *CDTContext {
return &CDTContext{ctxTypeListValue, key}
}
// CtxMapIndex defines Lookup map by index offset.
// If the index is negative, the resolved index starts backwards from end of list.
// If an index is out of bounds, a parameter error will be returned.
// Examples:
// 0: First item.
// 4: Fifth item.
// -1: Last item.
// -3: Third to last item.
func CtxMapIndex(index int) *CDTContext {
return &CDTContext{ctxTypeMapIndex, IntegerValue(index)}
}
// CtxMapRank defines Lookup map by rank.
// 0 = smallest value
// N = Nth smallest value
// -1 = largest value
func CtxMapRank(rank int) *CDTContext {
return &CDTContext{ctxTypeMapRank, IntegerValue(rank)}
}
// CtxMapKey defines Lookup map by key.
func CtxMapKey(key Value) *CDTContext {
return &CDTContext{ctxTypeMapKey, key}
}
// Create map with given type at map key.
func CtxMapKeyCreate(key Value, order mapOrderType) *CDTContext {
return &CDTContext{ctxTypeMapKey | order.flag, key}
}
// CtxMapValue defines Lookup map by value.
func CtxMapValue(key Value) *CDTContext {
return &CDTContext{ctxTypeMapValue, key}
}