/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package com.sun.codemodel.tests.util;

import java.io.StringWriter;

import com.sun.codemodel.JDeclaration;
import com.sun.codemodel.JExpression;
import com.sun.codemodel.JFormatter;
import com.sun.codemodel.JGenerable;

/**
 * Various utilities for codemodel tests.
 *
 * @author Aleksei Valikov
 */
public class CodeModelTestsUtils {

    /**
     * Hidden constructor.
     */
    private CodeModelTestsUtils() {
    }

    /**
     * Prints an expression into a string.
     *
     * @param expression expression to print into a string.
     * @return Expression formatted as a string.
     */
    public static String toString(JExpression expression) {
        if (expression == null) {
            throw new IllegalArgumentException("Generable must not be null.");
        }
        final StringWriter stringWriter = new StringWriter();
        final JFormatter formatter = new JFormatter(stringWriter);
        expression.generate(formatter);
        return stringWriter.toString();
    }

    public static String declare(JDeclaration declaration) {
        if (declaration == null) {
            throw new IllegalArgumentException("Declaration must not be null.");
        }
        final StringWriter stringWriter = new StringWriter();
        final JFormatter formatter = new JFormatter(stringWriter);
        declaration.declare(formatter);
        return stringWriter.toString();
    }

    public static String generate(JGenerable generable) {
        if (generable == null) {
            throw new IllegalArgumentException("Generable must not be null.");
        }
        final StringWriter stringWriter = new StringWriter();
        final JFormatter formatter = new JFormatter(stringWriter);
        generable.generate(formatter);
        return stringWriter.toString();
    }
}