/*
 * Copyright cast(C) 2005 db4objects Inc.  http://www.db4o.com
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     db4objects - Initial API and implementation
 *     Tom Schindl<tom.schindl@bestsolution.at> - bugfix for 217940
 */
module org.eclipse.core.internal.databinding.conversion.StringToBooleanPrimitiveConverter;

import java.lang.all;

import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.StringTokenizer;

import org.eclipse.core.databinding.conversion.IConverter;
import org.eclipse.core.internal.databinding.BindingMessages;

/**
 * StringToBooleanPrimitiveConverter.
 */
public class StringToBooleanPrimitiveConverter : IConverter {
    private static String[] trueValues;

    private static String[] falseValues;

    static this(){
        String delimiter = BindingMessages.getString(BindingMessages.VALUE_DELIMITER);
        String values = BindingMessages.getString(BindingMessages.TRUE_STRING_VALUES);
        trueValues = valuesToSortedArray(delimiter, values);

        values = BindingMessages.getString(BindingMessages.FALSE_STRING_VALUES);
        falseValues = valuesToSortedArray(delimiter, values);
    }

    /**
     * Returns a sorted array with all values converted to upper case.
     *
     * @param delimiter
     * @param values
     * @return sorted array of values
     */
    private static String[] valuesToSortedArray(String delimiter, String values) {
        List list = new LinkedList();
        StringTokenizer tokenizer = new StringTokenizer(values, delimiter);
        while (tokenizer.hasMoreTokens()) {
            list.add(tokenizer.nextToken().toUpperCase());
        }

        String[] array = cast(String[]) list.toArray(new String[list.size()]);
        Arrays.sort(array);

        return array;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.jface.binding.converter.IConverter#convert(java.lang.Object)
     */
    public Object convert(Object source) {
        String s = stringcast( source);
        s = s.toUpperCase();

        if (Arrays.binarySearch(trueValues, s) > -1) {
            return Boolean.TRUE;
        }

        if (Arrays.binarySearch(falseValues, s) > -1) {
            return Boolean.FALSE;
        }

        throw new IllegalArgumentException(s ~ " is not a legal bool value"); //$NON-NLS-1$
    }

    public Object getFromType() {
        return Class.fromType!(StringCls);
    }

    public Object getToType() {
        return Boolean.TYPE;
    }

}