In This Topic ▼

isVirtual Property

Summary

Indicates that this document is virtual.

Syntax

TypeScript

JavaScript

Object.defineProperty(CacheInfo.prototype, 'isVirtual', 
   get: function(), 
   set: function(value) 
)

isVirtual: boolean;

Property Value

true if this document is virtual; otherwise, false.

Remarks

If the value of isVirtual is true, then this document was originally created using DocumentFactory.create. In this case, the document does not have an original file associated with it.

Example

CheckCacheInfo.ts

DocumentHelper.ts

CheckCacheInfo.js

DocumentHelper.js

CheckCacheInfo.html

import { DocumentHelper } from "../../utilities/DocumentHelper"; 
 
export class DocumentFactory_CheckCacheInfoExample { 
   public constructor() { 
      lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/js/LEADTOOLSEVAL.txt", "EVAL", null); 
      DocumentHelper.initFactory(); 
   } 
 
   public run = (buttonID: string) => { 
      const exampleButton = document.getElementById(buttonID); 
      exampleButton.onclick = this.checkCache; 
   } 
 
   checkCache = () => { 
      // Load a new document 
      const url = "https://demo.leadtools.com/images/pdf/leadtools.pdf"; 
      const loadDocumentOptions = new lt.Document.LoadDocumentOptions(); 
 
      lt.Document.DocumentFactory.loadFromUri(url, loadDocumentOptions) 
         .done((document: lt.Document.LEADDocument) => { 
            DocumentHelper.log("Document loaded with " + document.pages.count + " pages", document); 
            // Check its cache info 
            lt.Document.DocumentFactory.checkCacheInfo(document.documentId) 
               .done((cacheInfo) => { 
                  if (cacheInfo) { 
                     // Found, show it 
                     DocumentHelper.log("Document was found in the cache"); 
                     DocumentHelper.log("IsVirtual is " + cacheInfo.isVirtual); 
                     DocumentHelper.log("IsLoaded is " + cacheInfo.isLoaded); 
                     DocumentHelper.log("HasAnnotations is " + cacheInfo.hasAnnotations); 
                     DocumentHelper.log("Name is " + cacheInfo.name); 
                     DocumentHelper.log("MIMEType is " + cacheInfo.mimeType); 
                     DocumentHelper.log("MIMEType accepted " + cacheInfo.isMimeTypeAccepted); 
                     DocumentHelper.log("Number of Pages is " + cacheInfo.pageCount); 
                  } else { 
                     DocumentHelper.log("Document was not found in the cache"); 
                  } 
               }) 
               .fail(DocumentHelper.showServiceError); 
         }) 
         .fail(DocumentHelper.showServiceError); 
   } 
}

export class DocumentHelper { 
   static showServiceError = (jqXHR, statusText, errorThrown) => { 
      alert("Error returned from service. See the console for details."); 
      const serviceError = lt.Document.ServiceError.parseError(jqXHR, statusText, errorThrown); 
      console.error(serviceError); 
   } 
 
   static log = (message: string, data?: any) => { 
      const outputElement = document.getElementById("output"); 
      if (outputElement) { 
         const time = (new Date()).toLocaleTimeString(); 
         const textElement = document.createElement("p"); 
         textElement.innerHTML = (outputElement.childElementCount + 1) + " [" + time + "]: " + message; 
         outputElement.insertBefore(textElement, outputElement.firstChild); 
      } 
 
      if (!data) 
         console.log(message); 
      else 
         console.log(message, data); 
   } 
 
   static initFactory = () => { 
      // To communicate with the DocumentsService, it must be running! 
      // Change these parameters to match the path to the service. 
      lt.Document.DocumentFactory.serviceHost = "http://localhost:40000"; 
      lt.Document.DocumentFactory.servicePath = ""; 
      lt.Document.DocumentFactory.serviceApiPath = "api"; 
   } 
}

import { DocumentHelper } from "../../utilities/DocumentHelper"; 
 
export class DocumentFactory_CheckCacheInfoExample { 
   constructor() { 
      lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/js/LEADTOOLSEVAL.txt", "EVAL", null); 
      DocumentHelper.initFactory(); 
   } 
 
   run = (buttonID) => { 
      const exampleButton = document.getElementById(buttonID); 
      exampleButton.onclick = this.checkCache; 
   } 
 
   checkCache = () => { 
      // Load a new document 
      const url = "https://demo.leadtools.com/images/pdf/leadtools.pdf"; 
      const loadDocumentOptions = new lt.Document.LoadDocumentOptions(); 
 
      lt.Document.DocumentFactory.loadFromUri(url, loadDocumentOptions) 
         .done((document) => { 
            DocumentHelper.log("Document loaded with " + document.pages.count + " pages", document); 
            // Check its cache info 
            lt.Document.DocumentFactory.checkCacheInfo(document.documentId) 
               .done((cacheInfo) => { 
                  if (cacheInfo) { 
                     // Found, show it 
                     DocumentHelper.log("Document was found in the cache"); 
                     DocumentHelper.log("IsVirtual is " + cacheInfo.isVirtual); 
                     DocumentHelper.log("IsLoaded is " + cacheInfo.isLoaded); 
                     DocumentHelper.log("HasAnnotations is " + cacheInfo.hasAnnotations); 
                     DocumentHelper.log("Name is " + cacheInfo.name); 
                     DocumentHelper.log("MIMEType is " + cacheInfo.mimeType); 
                     DocumentHelper.log("MIMEType accepted " + cacheInfo.isMimeTypeAccepted); 
                     DocumentHelper.log("Number of Pages is " + cacheInfo.pageCount); 
                  } else { 
                     DocumentHelper.log("Document was not found in the cache"); 
                  } 
               }) 
               .fail(DocumentHelper.showServiceError); 
         }) 
         .fail(DocumentHelper.showServiceError); 
   } 
}

export class DocumentHelper { 
   static showServiceError = (jqXHR, statusText, errorThrown) => { 
      alert("Error returned from service. See the console for details."); 
      const serviceError = lt.Document.ServiceError.parseError(jqXHR, statusText, errorThrown); 
      console.error(serviceError); 
   } 
 
   static log = (message, data) => { 
      const outputElement = document.getElementById("output"); 
      if (outputElement) { 
         const time = (new Date()).toLocaleTimeString(); 
         const textElement = document.createElement("p"); 
         textElement.innerHTML = (outputElement.childElementCount + 1) + " [" + time + "]: " + message; 
         outputElement.insertBefore(textElement, outputElement.firstChild); 
      } 
 
      if (!data) 
         console.log(message); 
      else 
         console.log(message, data); 
   } 
 
   static initFactory = () => { 
      // To communicate with the DocumentsService, it must be running! 
      // Change these parameters to match the path to the service. 
      lt.Document.DocumentFactory.serviceHost = "http://localhost:40000"; 
      lt.Document.DocumentFactory.servicePath = ""; 
      lt.Document.DocumentFactory.serviceApiPath = "api"; 
   } 
}

<!doctype html> 
<html lang="en"> 
<title>Document Example | CheckCacheInfo</title> 
 
<head> 
   <script src="https://code.jquery.com/jquery-2.2.4.min.js" 
      integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous"></script> 
 
   <script src="../../LT/Leadtools.js"></script> 
   <script src="../../LT/Leadtools.Controls.js"></script> 
   <script src="../../LT/Leadtools.Annotations.Engine.js"></script> 
   <script src="../../LT/Leadtools.Annotations.Designers.js"></script> 
   <script src="../../LT/Leadtools.Annotations.Rendering.Javascript.js"></script> 
   <script src="../../LT/Leadtools.Annotations.Automation.js"></script> 
   <script src="../../LT/Leadtools.ImageProcessing.Main.js"></script> 
   <script src="../../LT/Leadtools.ImageProcessing.Color.js"></script> 
   <script src="../../LT/Leadtools.ImageProcessing.Core.js"></script> 
   <script src="../../LT/Leadtools.ImageProcessing.Effects.js"></script> 
   <script src="../../LT/Leadtools.Document.js"></script> 
   <script src="../../LT/Leadtools.Document.Viewer.js"></script> 
   <link rel="stylesheet" type="text/css" href="../../css/examples.css"> 
 
   <!-- All demo files are bundled and appended to the window --> 
   <script src="../../bundle.js" type="text/javascript"></script> 
</head> 
 
<body> 
   <div> 
      <button type="button" id="exampleButton">Run Example</button> 
   </div> 
   <div id="output"></div> 
   <div> 
      <img id="img" /> 
   </div> 
</body> 
 
<script> 
   window.onload = () => { 
      const example = new window.examples.DocumentFactory.CheckCacheInfo(); 
      example.run("exampleButton"); 
   }; 
</script> 
</html>