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POIFSViewEngine.javaAPI DocApache Poi 3.0.14458Mon Jan 01 12:39:36 GMT 2007org.apache.poi.poifs.dev

POIFSViewEngine

public class POIFSViewEngine extends Object
This class contains methods used to inspect POIFSViewable objects
author
Marc Johnson (mjohnson at apache dot org)

Fields Summary
private static final String
_EOL
Constructors Summary
Methods Summary
private static java.lang.Stringindent(int indentLevel, java.lang.String indentString, java.lang.String data)

        StringBuffer finalBuffer  = new StringBuffer();
        StringBuffer indentPrefix = new StringBuffer();

        for (int j = 0; j < indentLevel; j++)
        {
            indentPrefix.append(indentString);
        }
        LineNumberReader reader =
            new LineNumberReader(new StringReader(data));

        try
        {
            String line = reader.readLine();

            while (line != null)
            {
                finalBuffer.append(indentPrefix).append(line).append(_EOL);
                line = reader.readLine();
            }
        }
        catch (IOException e)
        {
            finalBuffer.append(indentPrefix).append(e.getMessage())
                .append(_EOL);
        }
        return finalBuffer.toString();
public static java.util.ListinspectViewable(java.lang.Object viewable, boolean drilldown, int indentLevel, java.lang.String indentString)
Inspect an object that may be viewable, and drill down if told to

param
viewable the object to be viewed
param
drilldown if true, and the object implements POIFSViewable, inspect the objects' contents (recursively)
param
indentLevel how far in to indent each string
param
indentString string to use for indenting
return
a List of Strings holding the content


                                                                                                     

         
                                         
                                         
                                         
    
        List objects = new ArrayList();

        if (viewable instanceof POIFSViewable)
        {
            POIFSViewable inspected = ( POIFSViewable ) viewable;

            objects.add(indent(indentLevel, indentString,
                               inspected.getShortDescription()));
            if (drilldown)
            {
                if (inspected.preferArray())
                {
                    Object[] data = inspected.getViewableArray();

                    for (int j = 0; j < data.length; j++)
                    {
                        objects.addAll(inspectViewable(data[ j ], drilldown,
                                                       indentLevel + 1,
                                                       indentString));
                    }
                }
                else
                {
                    Iterator iter = inspected.getViewableIterator();

                    while (iter.hasNext())
                    {
                        objects.addAll(inspectViewable(iter.next(),
                                                       drilldown,
                                                       indentLevel + 1,
                                                       indentString));
                    }
                }
            }
        }
        else
        {
            objects.add(indent(indentLevel, indentString,
                               viewable.toString()));
        }
        return objects;