    /*
     * Licensed to the Apache Software Foundation (ASF) under one or more
     * contributor license agreements.  See the NOTICE file distributed with
     * this work for additional information regarding copyright ownership.
     * The ASF 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
     *
     *     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 examples;

    import java.io.IOException;

    import javax.servlet.jsp.JspException;
    import javax.servlet.jsp.JspTagException;
    import javax.servlet.jsp.JspWriter;
    import javax.servlet.jsp.tagext.TagSupport;

    /**
     * Accept and display a value.
     */
    public class ValuesTag extends TagSupport {

        private static final long serialVersionUID = 1L;

        // Using "-1" as the default value,
        // in the assumption that it won't be used as the value.
        // Cannot use null here, because null is an important case
        // that should be present in the tests.
        private Object objectValue = "-1";
        private String stringValue = "-1";
        private long longValue = -1;
        private double doubleValue = -1;

        public void setObject(Object objectValue) {
            this.objectValue = objectValue;
        }

        public void setString(String stringValue) {
            this.stringValue = stringValue;
        }

        public void setLong(long longValue) {
            this.longValue = longValue;
        }

        public void setDouble(double doubleValue) {
            this.doubleValue = doubleValue;
        }

        @Override
        public int doEndTag() throws JspException {
            JspWriter out = pageContext.getOut();

            try {
                if (!"-1".equals(objectValue)) {
                    out.print(objectValue);
                } else if (!"-1".equals(stringValue)) {
                    out.print(stringValue);
                } else if (longValue != -1) {
                    out.print(longValue);
                } else if (doubleValue != -1) {
                    out.print(doubleValue);
                } else {
                    out.print("-1");
                }
            } catch (IOException ex) {
                throw new JspTagException("IOException: " + ex.toString(), ex);
            }
            return super.doEndTag();
        }
    }