JsonUtil.java

/*******************************************************************************
 * Copyright (c) 2017 Red Hat.
 * 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:
 *     Red Hat - Initial Contribution
 *******************************************************************************/
package org.eclipse.che.api.languageserver.util;


import com.google.gwt.json.client.JSONBoolean;
import com.google.gwt.json.client.JSONNumber;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;

/**
 * Utility to convert stuff that is not statically typed in lsp4j (java.lang.Object)
 *
 * @author Thomas Mäder
 */
public class JsonUtil {
    public static JSONValue convertToJson(Object value) {
        if (value instanceof Enum) {
            return new JSONString(((Enum<?>)value).name());
        } else if (value instanceof String) {
            return new JSONString((String)value);
        } else if (value instanceof Number) {
            return new JSONNumber(((Number)value).doubleValue());
        } else if (value instanceof Boolean) {
            return JSONBoolean.getInstance((boolean)value);
        } else if (value instanceof JsonSerializable) {
            return ((JsonSerializable)value).toJsonElement();
        } else if (value instanceof JSONValue) {
            return (JSONValue)value;
        }
        throw new RuntimeException("Unexpected runtime value: " + value);
    }

}