52 lines
1.3 KiB
Java
52 lines
1.3 KiB
Java
package org.scribe.utils;
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import java.util.regex.Pattern;
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import org.scribe.model.OAuthConstants;
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public class Preconditions
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{
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private static final String DEFAULT_MESSAGE = "Received an invalid parameter";
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private static final Pattern URL_PATTERN = Pattern.compile("[a-zA-Z_-]+://\\S+");
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public static void checkNotNull(Object object, String errorMsg)
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{
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check(object != null, errorMsg);
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}
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public static void checkEmptyString(String string, String errorMsg)
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{
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check(string != null && !string.trim().equals(""), errorMsg);
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}
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public static void checkValidUrl(String url, String errorMsg)
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{
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checkEmptyString(url, errorMsg);
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check(isUrl(url), errorMsg);
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}
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public static void checkValidOAuthCallback(String url, String errorMsg)
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{
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checkEmptyString(url, errorMsg);
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if(url.toLowerCase().compareToIgnoreCase(OAuthConstants.OUT_OF_BAND) != 0)
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{
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check(isUrl(url), errorMsg);
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}
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}
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static boolean isUrl(String url)
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{
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return URL_PATTERN.matcher(url).matches();
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}
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private static void check(boolean requirements, String error)
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{
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String message = (error == null || error.trim().length() <= 0) ? DEFAULT_MESSAGE : error;
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if (!requirements)
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{
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throw new IllegalArgumentException(message);
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}
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}
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}
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