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5335bf249b
* update license and terms * Fixes * Create ACKNOWLEDGEMENTS.md * Update ACKNOWLEDGEMENTS.md * Revert go.mod changes and remove go1.11 tests
51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
// Copyright 2017 FoxyUtils ehf. All rights reserved.
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//
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// Use of this software package and source code is governed by the terms of the
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// UniDoc End User License Agreement (EULA) that is available at:
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// https://unidoc.io/eula/
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// A trial license code for evaluation can be obtained at https://unidoc.io.
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package unioffice
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import (
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"encoding/xml"
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"errors"
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"fmt"
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"reflect"
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)
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// Any is the interface used for marshaling/unmarshaling xsd:any
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type Any interface {
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MarshalXML(e *xml.Encoder, start xml.StartElement) error
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UnmarshalXML(d *xml.Decoder, start xml.StartElement) error
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}
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var creatorFns = map[string]interface{}{}
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// RegisterConstructor registers a constructor function used for unmarshaling
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// xsd:any elements.
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func RegisterConstructor(ns, name string, fn interface{}) {
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creatorFns[ns+"/"+name] = fn
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}
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// CreateElement creates an element with the given namespace and name. It is
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// used to unmarshal some xsd:any elements to the appropriate concrete type.
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func CreateElement(start xml.StartElement) (Any, error) {
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fn, ok := creatorFns[start.Name.Space+"/"+start.Name.Local]
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if !ok {
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r := &XSDAny{}
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return r, nil
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}
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v := reflect.ValueOf(fn)
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res := v.Call(nil)
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if len(res) != 1 {
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return nil, fmt.Errorf("constructor function should return one value, got %d", len(res))
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}
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any, ok := res[0].Interface().(Any)
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if !ok {
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return nil, errors.New("constructor function should return any 'Any'")
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}
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return any, nil
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}
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