org.eclipse.b3.enums.TriStateEnumHelper.java Source code

Introduction

Here is the source code for org.eclipse.b3.enums.TriStateEnumHelper.java

Source

/**
 * Copyright (c) 2010, Cloudsmith Inc.
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the copyright holder
 * listed above, as the Initial Contributor under such license. The text of
 * such license is available at www.eclipse.org.
 */

package org.eclipse.b3.enums;

import org.eclipse.b3.build.TriState;
import org.eclipse.xtext.conversion.IValueConverter;
import org.eclipse.xtext.conversion.ValueConverterException;
import org.eclipse.xtext.parsetree.AbstractNode;

import com.google.common.collect.BiMap;
import com.google.common.collect.EnumHashBiMap;
import com.google.common.collect.Maps;

public class TriStateEnumHelper {

    public static final BiMap<TriState, String> converterMap = createEnumMap();

    public static final String DEFAULT_STR = "default";;

    public static final String TRUE_STR = "true";

    public static final String FALSE_STR = "false";

    private static BiMap<TriState, String> createEnumMap() {
        BiMap<TriState, String> map = new EnumHashBiMap<TriState, String>(TriState.class);
        map.put(TriState.DEFAULT, DEFAULT_STR);
        map.put(TriState.TRUE, TRUE_STR);
        map.put(TriState.FALSE, FALSE_STR);

        return Maps.unmodifiableBiMap(map);
    }

    public static IValueConverter<TriState> getValueConverter() {
        return new IValueConverter<TriState>() {

            // @Override
            public String toString(TriState value) {
                String r = converterMap.get(value);
                return r == null ? "unknown_tri_state" : r;
            }

            // @Override
            public TriState toValue(String string, AbstractNode node) throws ValueConverterException {
                TriState x = converterMap.inverse().get(string);
                if (x != null)
                    return x;
                throw new ValueConverterException(
                        "The value '" + string + "' is not a valid tri state value (default, true, false): ", node,
                        null);
            }
        };
    }
}