com.bstek.dorado.view.output.OutputUtils.java Source code

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Here is the source code for com.bstek.dorado.view.output.OutputUtils.java

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/*
 * This file is part of Dorado 7.x (http://dorado7.bsdn.org).
 * 
 * Copyright (c) 2002-2012 BSTEK Corp. All rights reserved.
 * 
 * This file is dual-licensed under the AGPLv3 (http://www.gnu.org/licenses/agpl-3.0.html) 
 * and BSDN commercial (http://www.bsdn.org/licenses) licenses.
 * 
 * If you are unsure which license is appropriate for your use, please contact the sales department
 * at http://www.bstek.com/contact.
 */

package com.bstek.dorado.view.output;

import java.io.IOException;
import java.io.Writer;
import java.util.Collection;
import java.util.Date;

import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.lang.StringEscapeUtils;

import com.bstek.dorado.common.Ignorable;

/**
 * ?
 * 
 * @author Benny Bao (mailto:benny.bao@bstek.com)
 * @since Sep 19, 2008
 */
public abstract class OutputUtils {
    /**
     * 
     * <ul>
     * <li>java.lang.String"#default"null""</li>
     * <li>java.lang.Number"#default"0</li>
     * <li>java.lang.Boolean"#default"false</li>
     * <li>java.util.Collection"#default"??0</li>
     * <li>"#default"null</li>
     * </ul>
     */
    public static final String ESCAPE_VALUE = "#default";

    /**
     * 
     */
    public static final String IGNORE_VALUE = "#ignore";

    /**
     * ?
     * 
     * @param value
     *            
     * @return ?
     */
    public static boolean isEscapeValue(Object value) {
        return isEscapeValue(value, ESCAPE_VALUE);
    }

    /**
     * ?
     * 
     * @param value
     *            
     * @param escapeValue
     *            
     * @return ?
     */
    public static boolean isEscapeValue(Object value, Object escapeValue) {
        if (value != escapeValue) {
            if (ESCAPE_VALUE.equals(escapeValue)) {
                return (value == null || (value instanceof String && value.equals(""))
                        || (value instanceof Number && ((Number) value).doubleValue() == 0)
                        || (value instanceof Boolean && !((Boolean) value).booleanValue())
                        || (value instanceof Collection<?> && ((Collection<?>) value).isEmpty())
                        || (value instanceof Ignorable && ((Ignorable) value).isIgnored()));
            } else if (IGNORE_VALUE.equals(escapeValue)) {
                return true;
            }
            return String.valueOf(value).equals(String.valueOf(escapeValue));
        }
        return true;
    }

    /**
     * HTMLJavaScript
     * 
     * @throws IOException
     */
    public static void outputScriptBeginTag(Writer writer) throws IOException {
        writer.write("<script language=\"javascript\" type=\"text/javascript\">\n");
    }

    /**
     * HTMLJavaScript?
     * 
     * @throws IOException
     */
    public static void outputScriptEndTag(Writer writer) throws IOException {
        writer.write("</script>\n");
    }

    /**
     * ??HTML
     * 
     * @throws IOException
     */
    public static void outputString(Writer writer, String s) throws IOException {
        writer.write(StringEscapeUtils.escapeHtml(s));
    }

    /**
     * Java?JavaScript
     * 
     * @param writer
     *            Writer
     * @param owner
     *            JavaScript?
     * @param object
     *            Java
     * @param property
     *            ???
     * @param escapeValue
     *            Java?
     * @throws Exception
     * @see #DEFAULT_VALUE
     */
    public static void outputProperty(Writer writer, String owner, Object object, String property,
            Object escapeValue) throws Exception {
        Object value = PropertyUtils.getProperty(object, property);
        if (value == escapeValue || (escapeValue != null && escapeValue.equals(value))) {
            return;
        }

        writer.write(owner);
        writer.write('.');
        writer.write(property);
        writer.write('=');

        if (value == null) {
            writer.write("null");
        } else if (value instanceof String) {
            writer.write("\"");
            writer.write((String) value);
            writer.write("\"");
        } else if (value instanceof Number || value instanceof Boolean) {
            writer.write(value.toString());
        } else if (value instanceof Date) {
            writer.write("new Date(");
            writer.write(String.valueOf(((Date) value).getTime()));
            writer.write(")");
        } else {
            writer.write("\"");
            writer.write(value.toString());
            writer.write("\"");
        }
        writer.write(";\n");
    }

    /**
     * Java?JavaScript
     * 
     * @param writer
     *            Writer
     * @param owner
     *            JavaScript?
     * @param object
     *            Java
     * @param property
     *            ???
     */
    public static void outputProperty(Writer writer, String owner, Object object, String property)
            throws Exception {
        outputProperty(writer, owner, object, property, null);
    }
}