/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.directory.studio.ldapbrowser.common.widgets;
import java.nio.charset.Charset;
import org.apache.directory.studio.ldapbrowser.core.BrowserCoreConstants;
/**
* The FileEncodingInput is an OptionInput with fixed options.
* It is used to select the file encoding. The default
* value is always the platform's default encoding.
* The other options are the values return from
* {@link Charset#availableCharsets()}. No custom input is allowed.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev$, $Date$
*/
public class FileEncodingInput extends OptionsInput
{
/**
* Creates a new instance of FileEncodingInput.
*
* @param initialRawValue the initial raw value
* @param asGroup the asGroup flag
*/
public FileEncodingInput( String initialRawValue, boolean asGroup )
{
super(
Messages.getString( "FileEncodingInput.FileEncoding" ), getDefaultDisplayValue(), getDefaultRawValue(), getOtherDisplayValues(), //$NON-NLS-1$
getOtherRawValues(), initialRawValue, asGroup, false );
}
/**
* Gets the default display value.
*
* @return the default display value
*/
private static String getDefaultDisplayValue()
{
return getCharsetDisplayValue( getDefaultRawValue() );
}
/**
* Gets the default raw value, always the platform's
* default encoding.
*
* @return the default raw value
*/
private static String getDefaultRawValue()
{
return BrowserCoreConstants.DEFAULT_ENCODING;
}
/**
* Gets the other display values.
*
* @return the other display values
*/
private static String[] getOtherDisplayValues()
{
String[] otherEncodingsRawValues = getOtherRawValues();
String[] otherEncodingsDisplayValues = new String[otherEncodingsRawValues.length];
for ( int i = 0; i < otherEncodingsDisplayValues.length; i++ )
{
String rawValue = otherEncodingsRawValues[i];
otherEncodingsDisplayValues[i] = getCharsetDisplayValue( rawValue );
}
return otherEncodingsDisplayValues;
}
/**
* Gets the other raw values. That are all values
* returned from {@link Charset#availableCharsets()}.
*
* @return the other raw values
*/
private static String[] getOtherRawValues()
{
String[] otherEncodingsRawValues = ( String[] ) Charset.availableCharsets().keySet().toArray( new String[0] );
return otherEncodingsRawValues;
}
/**
* Gets the charset display value.
*
* @param charsetRawValue the charset raw value
*
* @return the charset display value
*/
private static String getCharsetDisplayValue( String charsetRawValue )
{
try
{
Charset charset = Charset.forName( charsetRawValue );
return charset.displayName();
}
catch ( Exception e )
{
return charsetRawValue;
}
}
}