org.jasig.portal.url.BaseEncodedStringBuilder.java Source code

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Here is the source code for org.jasig.portal.url.BaseEncodedStringBuilder.java

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/**
 * Licensed to Apereo under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Apereo licenses this file to you 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 the following location:
 *
 *   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.
 */
package org.jasig.portal.url;

import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import org.apache.commons.lang.Validate;

/**
 * Base class to handle encoding strings
 * 
 * @author Eric Dalquist
 * @version $Revision$
 */
public abstract class BaseEncodedStringBuilder implements Serializable, Cloneable {
    private static final long serialVersionUID = 1L;

    private final String encoding;

    public BaseEncodedStringBuilder(String encoding) {
        Validate.notNull(encoding, "encoding can not be null");
        this.checkEncoding(encoding);

        this.encoding = encoding;
    }

    protected final void checkEncoding(String encoding) {
        try {
            URLEncoder.encode("", encoding);
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException("Encoding '" + encoding + "' is not supported", e);
        }
    }

    protected final String encode(String s) {
        try {
            return URLEncoder.encode(s, this.encoding);
        } catch (UnsupportedEncodingException e) {
            throw new IllegalStateException("Encoding '" + this.encoding
                    + "' is not supported. This should have been caught in the consructor.", e);
        }
    }

    public String getEncoding() {
        return encoding;
    }
}