GroovyRenderer.java

/**
 *   GRANITE DATA SERVICES
 *   Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
 *
 *   This file is part of the Granite Data Services Platform.
 *
 *   Granite Data Services is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2.1 of the License, or (at your option) any later version.
 *
 *   Granite Data Services is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
 *   General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 *   USA, or see <http://www.gnu.org/licenses/>.
 */
package org.granite.generator.gsp;

import java.util.List;

import org.granite.generator.gsp.token.Comment;
import org.granite.generator.gsp.token.Expression;
import org.granite.generator.gsp.token.Scriplet;
import org.granite.generator.gsp.token.TemplateText;
import org.granite.generator.gsp.token.Token;

/**
 * @author Franck WOLFF
 */
public class GroovyRenderer implements Renderer {

    private String source = null;

    @Override
	public String renderSource(List<Token> tokens) {
        return renderSource(tokens, null);
    }

    @Override
	public String renderSource(List<Token> tokens, String out) {
        StringBuilder sb = new StringBuilder(1024);

        for (Token token : tokens) {
            if (token instanceof TemplateText) {
                String content = token.getContent();

                if (content.length() > 0) {
                    int iLast = content.length() - 1;
                    sb.append("print(\"");

                    for (int i = 0; i < content.length(); i++) {
                        char c = content.charAt(i);

                        switch (c) {
                        case '\\':
                            sb.append("\\\\");
                            break;
                        case '"' :
                            sb.append("\\\"");
                            break;
                        case '\n':
                            sb.append("\\n\");\n");
                            if (i < iLast)
                                sb.append("print(\"");
                            break;
                        case '\f':
                            sb.append("\\f");
                            break;
                        default  :
                            sb.append(c);
                            break;
                        }
                    }

                    if (content.charAt(iLast) != '\n')
                        sb.append("\");\n");
                }
            }
            else if (token instanceof Expression)
                sb.append("print(").append(token.getContent()).append(");\n");
            else if (token instanceof Scriplet)
                sb.append(token.getContent()).append('\n');
            else if (!(token instanceof Comment))
                throw new UnsupportedOperationException("Unsupported token (not implemented): " + token);
        }

        source = sb.toString();

        return source;
    }

    @Override
	public String getSource() {
        return source;
    }
}