How to Retrieve All Array Elements During XML Unmarshaling in Go?

XML Array Unmarshaling in Go: Capturing All Elements

In the provided code, the issue arises when unmarshaling an XML string containing multiple instances of a particular struct type. The current implementation only retrieves the first element of the array.

To overcome this limitation, consider the following approach:

Using an XML Decoder

Utilizing an xml.Decoder allows us to iterate over the XML data and retrieve all instances of the struct. Here's the updated code:

<code class="go">package main

import (
    "bytes"
    "encoding/xml"
    "fmt"
    "io"
    "log"
)

type HostSystemIdentificationInfo struct {
    IdentiferValue string `xml:"identifierValue"`
    IdentiferType  struct {
        Label   string `xml:"label"`
        Summary string `xml:"summary"`
        Key     string `xml:"key"`
    } `xml:"identifierType"`
}

func main() {
    d := xml.NewDecoder(bytes.NewBufferString(VV))
    for {
        var t HostSystemIdentificationInfo
        err := d.Decode(&t)
        if err == io.EOF {
            break
        }
        if err != nil {
            log.Fatal(err)
        }
        fmt.Println(t)
    }
}

const VV = `<HostSystemIdentificationInfo xsi:type="HostSystemIdentificationInfo">
    <identifierValue> unknown</identifierValue>
    <identifierType>
        <label>Asset Tag</label>
        <summary>Asset tag of the system</summary>
        <key>AssetTag</key>
    </identifierType>
</HostSystemIdentificationInfo>
<HostSystemIdentificationInfo xsi:type="HostSystemIdentificationInfo">
    <identifierValue>Dell System</identifierValue>
    <identifierType>
        <label>OEM specific string</label>
        <summary>OEM specific string</summary>
        <key>OemSpecificString</key>
    </identifierType>
</HostSystemIdentificationInfo>
<HostSystemIdentificationInfo xsi:type="HostSystemIdentificationInfo">
    <identifierValue>5[0000]</identifierValue>
    <identifierType>
        <label>OEM specific string</label>
        <summary>OEM specific string</summary>
        <key>OemSpecificString</key>
    </identifierType>
</HostSystemIdentificationInfo>
<HostSystemIdentificationInfo xsi:type="HostSystemIdentificationInfo">
    <identifierValue>REDACTED</identifierValue>
    <identifierType>
        <label>Service tag</label>
        <summary>Service tag of the system</summary>
        <key>ServiceTag</key>
    </identifierType>
</HostSystemIdentificationInfo>`</code>

Playing with Go:

[Playground Link](http://play.golang.org/p/c7-E_Afe-3)

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