Name: sdR10048 Date: 12/06/2000


The method
java.awt.datatransfer.DataFlavor.selectBestTextFlavor(DataFlavor[] availableFlavors)
starts to compare charsets when MIME types are different.
Say, in case when 'availableFlavors' contains two flavors:
{
 new DataFlavor("text/plain;charset=UTF-16"),
 new DataFlavor("text/sgml;charset=a")
}

it returns DataFlavor("text/plain;charset=UTF-16") but should return
DataFlavor("text/sgml;charset=a") as javadoc says:
---
For example, "text/sgml" will be selected over "text/html", and
"text/enriched" will be selected over "text/richtext". If there are
two or more text flavors with the best MIME subtype in the array,
their charsets are compared.

The full javadoc for this method is here:
---
public static final DataFlavor selectBestTextFlavor(DataFlavor[] availableFlavors)

Selects the best text DataFlavor from an array of DataFlavors. Only
DataFlavor.stringFlavor, and equivalent flavors, and flavors that have
a primary MIME type of "text", are considered for selection. If the
array contains stringFlavor , or an equivalent flavor (a serialized
java.lang.String ), then this flavor is selected. Flavors having
"text" as their primary MIME type are sorted by their secondary MIME
type in the following order: "plain", "calendar", "css", "directory",
"rfc822-header", "tab-separated-values", "uri-list", "richtext",
"enriched", "rtf", "html", "xml", "sgml". For example, "text/sgml"
will be selected over "text/html", and "text/enriched" will be
selected over "text/richtext". If there are two or more text flavors
with the best MIME subtype in the array, their charsets are
compared. Unicode charsets, such as "UTF-16", "UTF-8", "UTF-16BE" and
"UTF-16LE", are considered best. After them, platform default charset
is selected. "US-ASCII" is worst. All other charsets are chosen in
alphabetical order.

Parameters:
   availableFlavors - an array of available DataFlavors
Returns:
   the best (highest fidelity) flavor in an encoding supported by this
   implementation of the Java platform, or null if none can be found.
---
Minimized test demonstrating this bug:

import java.awt.datatransfer.*;

public class Test {
    public static void main(String[] args) {
        try {
            DataFlavor[] dfs = {
                new DataFlavor("text/plain;charset=UTF-16"),
                new DataFlavor("text/sgml;charset=a")
            };
            System.out.println("Best DF: " +
                DataFlavor.selectBestTextFlavor(dfs));
        } catch (ClassNotFoundException e) {
            System.out.println("unexpected "+e);
        }
    }
}
---
Test output:

] dsv@falcon ~/tmp
] java -version
java version "1.4.0beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0beta-b40)
Java HotSpot(TM) Client VM (build 1.4beta-B40, mixed mode)

] dsv@falcon ~/tmp
] java Test
Best DF: java.awt.datatransfer.DataFlavor[representationclass=java.io.InputStream;mimetype=text/plain]
---
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