org.siphon.jssp.JsspTranslator.java Source code

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Here is the source code for org.siphon.jssp.JsspTranslator.java

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/*******************************************************************************
 * The MIT License (MIT)
 * Copyright  2015 Inshua,inshua@gmail.com, All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
 * associated documentation files (the Software?), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED AS IS?, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *******************************************************************************/
package org.siphon.jssp;

import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.jasper.tagplugins.jstl.core.Out;

public class JsspTranslator {

    private String code;

    public JsspTranslator(String code) {
        this.code = code;
    }

    public String translate() {
        StringBuffer result = new StringBuffer();
        result.append(
                "d2js.jssp = function(params){var request = this.request;var response = this.response; var out = this.out;var session = this.session;");
        result.append("response.setContentType('text/html; charset=utf-8'); ");

        StringBuffer line = new StringBuffer();
        boolean afterCode = false;
        for (int i = 0; i < code.length(); i++) {
            char c = code.charAt(i);
            switch (c) {
            case '[':
                if (code.startsWith("[%", i)) {

                    if (line.length() > 0) {
                        result.append(outputLine(line));
                        line.setLength(0);
                    }

                    StringBuffer code = new StringBuffer();
                    if (this.code.startsWith("[%=", i)) {
                        i += 2;
                        i += tillTerm(i + 1, code);
                        result.append("out.print(").append(code).append(");");
                    } else if (this.code.startsWith("[%~", i)) {
                        i += 2;
                        i += tillTerm(i + 1, code);
                        result.append("out.print(JSON.stringify(").append(code).append("));");
                    } else if (this.code.startsWith("[%-", i)) {
                        i += 2;
                        i += tillTerm(i + 1, code);
                        result.append("out.printHtml(").append(code).append(");");
                    } else {
                        i++;
                        i += tillTerm(i + 1, code);
                        result.append(code);
                    }
                    afterCode = true;
                } else {
                    line.append(c);
                }
                break;

            case '\r':
                if (code.startsWith("\r\n", i)) {
                    i++;
                }
            case '\n':
                if (line.length() == 0 && afterCode) {
                    result.append(System.lineSeparator());
                } else {
                    line.append(System.lineSeparator());
                    result.append(outputLine(line)).append(System.lineSeparator());
                    line.setLength(0);
                }
                break;

            default:
                if (afterCode)
                    afterCode = false;
                line.append(c);
            }
        }

        if (line.length() > 0) {
            result.append(outputLine(line));
        }

        result.append("}");

        return result.toString();
    }

    private int tillTerm(int start, StringBuffer output) {
        int i = start;
        till: for (; i < code.length(); i++) {
            char c = code.charAt(i);
            switch (c) {
            case '%':
                if (code.startsWith("%]", i)) {
                    i += 2;
                    break till;
                } else {
                    output.append(c);
                }
                break;

            default:
                output.append(c);
            }

        }
        return i - start;
    }

    private String outputLine(StringBuffer line) {
        return "out.print(\"" + StringEscapeUtils.escapeEcmaScript(line.toString()) + "\");";
    }

}