B4J Question MiniHTMLParser shows error message when no node text present

wimpie3

Well-Known Member
Licensed User
Longtime User
I have a table with some empty cells. When I do this:
B4X: 
HtmlParser.GetTextFromNode(tds.Get(t),0)
on an empty cell, MiniHTMLParser throws an error (returning an empty string would be better IMHO).
B4X: 
Error occurred on line: 276 (MiniHtmlParser)
java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
    at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
    at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
    at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)
    at java.base/java.util.Objects.checkIndex(Objects.java:373)
    at java.base/java.util.ArrayList.get(ArrayList.java:426)
    at anywheresoftware.b4a.objects.collections.List.Get(List.java:122)
    at b4j.example.minihtmlparser._gettextfromnode(minihtmlparser.java:213)
    at jdk.internal.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:629)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:237)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:111)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:100)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:98)
    at anywheresoftware.b4a.shell.DebugResumableSub$RemoteResumableSub.resume(DebugResumableSub.java:21)
    at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:156)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:105)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:100)
    at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:513)
    at anywheresoftware.b4a.keywords.Common.access$0(Common.java:493)
    at anywheresoftware.b4a.keywords.Common$CallSubDelayedHelper.run(Common.java:567)
    at anywheresoftware.b4a.keywords.SimpleMessageLoop.runMessageLoop(SimpleMessageLoop.java:47)
    at anywheresoftware.b4a.StandardBA.startMessageLoop(StandardBA.java:43)
    at anywheresoftware.b4a.shell.ShellBA.startMessageLoop(ShellBA.java:121)
    at anywheresoftware.b4a.keywords.Common.StartMessageLoop(Common.java:180)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:309)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:111)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:100)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:98)
    at b4j.example.main.main(main.java:29)
 
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teddybear

Well-Known Member
Licensed User
MiniHTMLParser is a b4xlib, you can fix it.
B4X: 
'Returns the text value from a node.
Public Sub GetTextFromNode (Node As HtmlNode, ChildIndex As Int) As String
    Dim at As HtmlAttribute
    If Node.Children.Size > 0 Then
        Dim tn As HtmlNode = Node.Children.Get(ChildIndex)
        at = tn.Attributes.Get(0)
    Else
        at.Value=""
    End If
    Return UnescapeEntities(at.Value)
End Sub
 
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