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query_request.go
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query_request.go
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package message
import (
"encoding/xml"
"github.com/cyverse/go-irodsclient/irods/common"
"github.com/cyverse/go-irodsclient/irods/util"
"golang.org/x/xerrors"
)
// IRODSMessageQueryRequest stores query
type IRODSMessageQueryRequest struct {
XMLName xml.Name `xml:"GenQueryInp_PI"`
MaxRows int `xml:"maxRows"`
ContinueIndex int `xml:"continueInx"` // 1 for continueing, 0 for end
PartialStartIndex int `xml:"partialStartIndex"` // unknown
Options int `xml:"options"`
KeyVals IRODSMessageSSKeyVal `xml:"KeyValPair_PI"`
Selects IRODSMessageIIKeyVal `xml:"InxIvalPair_PI"`
Conditions IRODSMessageISKeyVal `xml:"InxValPair_PI"`
}
// NewIRODSMessageQueryRequest creates a IRODSMessageQueryRequest message
func NewIRODSMessageQueryRequest(maxRows int, continueIndex int, partialStartIndex int, options int) *IRODSMessageQueryRequest {
return &IRODSMessageQueryRequest{
MaxRows: maxRows,
ContinueIndex: continueIndex,
PartialStartIndex: partialStartIndex,
Options: options,
KeyVals: IRODSMessageSSKeyVal{
Length: 0,
},
Selects: IRODSMessageIIKeyVal{
Length: 0,
},
Conditions: IRODSMessageISKeyVal{
Length: 0,
},
}
}
// AddSelect adds a column to select
func (msg *IRODSMessageQueryRequest) AddSelect(key common.ICATColumnNumber, val int) {
msg.Selects.Add(int(key), val)
}
// AddCondition adds a condition
func (msg *IRODSMessageQueryRequest) AddCondition(key common.ICATColumnNumber, val string) {
escapedVal := util.EscapeXMLSpecialChars(val)
msg.Conditions.Add(int(key), escapedVal)
}
// AddKeyVal adds a key-value pair
func (msg *IRODSMessageQueryRequest) AddKeyVal(key common.KeyWord, val string) {
escapedVal := util.EscapeXMLSpecialChars(val)
msg.KeyVals.Add(string(key), escapedVal)
}
// GetBytes returns byte array
func (msg *IRODSMessageQueryRequest) GetBytes() ([]byte, error) {
xmlBytes, err := xml.Marshal(msg)
if err != nil {
return nil, xerrors.Errorf("failed to marshal irods message to xml: %w", err)
}
return xmlBytes, nil
}
// FromBytes returns struct from bytes
func (msg *IRODSMessageQueryRequest) FromBytes(bytes []byte) error {
err := xml.Unmarshal(bytes, msg)
if err != nil {
return xerrors.Errorf("failed to unmarshal xml to irods message: %w", err)
}
return nil
}
// GetMessage builds a message
func (msg *IRODSMessageQueryRequest) GetMessage() (*IRODSMessage, error) {
bytes, err := msg.GetBytes()
if err != nil {
return nil, xerrors.Errorf("failed to get bytes from irods message: %w", err)
}
msgBody := IRODSMessageBody{
Type: RODS_MESSAGE_API_REQ_TYPE,
Message: bytes,
Error: nil,
Bs: nil,
IntInfo: int32(common.GEN_QUERY_AN),
}
msgHeader, err := msgBody.BuildHeader()
if err != nil {
return nil, xerrors.Errorf("failed to build header from irods message: %w", err)
}
return &IRODSMessage{
Header: msgHeader,
Body: &msgBody,
}, nil
}