com.googlecode.batchfb.util.StringUtils.java Source code

Introduction

Here is the source code for com.googlecode.batchfb.util.StringUtils.java

Source

/*
 * Copyright (c) 2010 Jeff Schnitzer.
 * 
 * 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 com.googlecode.batchfb.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.Date;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.googlecode.batchfb.BinaryParam;
import com.googlecode.batchfb.Param;

/**
 * Some string handling utilities
 */
public final class StringUtils {
    /**
     * Masks the useless checked exception from URLEncoder.encode()
     */
    public static String urlEncode(String string) {
        try {
            return URLEncoder.encode(string, "utf-8");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Masks the useless checked exception from URLDecoder.decode()
     */
    public static String urlDecode(String string) {
        try {
            return URLDecoder.decode(string, "utf-8");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Stringify the parameter value in an appropriate way. Note that Facebook fucks up dates by using unix time-since-epoch
     * some places and ISO-8601 others. However, maybe unix times always work as parameters?
     */
    public static String stringifyValue(Param param, ObjectMapper mapper) {
        assert !(param instanceof BinaryParam);

        if (param.value instanceof String)
            return (String) param.value;
        if (param.value instanceof Date)
            return Long.toString(((Date) param.value).getTime() / 1000);
        else if (param.value instanceof Number)
            return param.value.toString();
        else
            return JSONUtils.toJSON(param.value, mapper);
    }

    /**
     * Reads an input stream into a String, encoding with UTF-8
     */
    public static String read(InputStream input) {
        try {
            StringBuilder bld = new StringBuilder();
            Reader reader = new InputStreamReader(input, "utf-8");
            int ch;
            while ((ch = reader.read()) >= 0)
                bld.append((char) ch);

            return bld.toString();
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
    }
}