Utils.java Source code

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Here is the source code for Utils.java

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// 
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at 
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// 

/**
 * URI Holder. This class assists with the decoding and encoding or HTTP URI's.
 * It differs from the java.net.URL class as it does not provide communications
 * ability, but it does assist with query string formatting.
 * <P>
 * UTF-8 encoding is used by default for % encoded characters. This may be
 * overridden with the org.mortbay.util.URI.charset system property.
 * 
 * @see UrlEncoded
 * @author Greg Wilkins (gregw)
 */
public class Utils {
    /** 
     * @param uri URI
     * @return True if the uri has a scheme
     */
    public static boolean hasScheme(String uri) {
        for (int i = 0; i < uri.length(); i++) {
            char c = uri.charAt(i);
            if (c == ':')
                return true;
            if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z'
                    || (i > 0 && (c >= '0' && c <= '9' || c == '.' || c == '+' || c == '-'))))
                break;
        }
        return false;
    }

}