/*
 * 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 org.apache.tomcat.util.descriptor.web;

import java.io.Serializable;
import java.util.Objects;

import org.apache.tomcat.util.buf.UDecoder;

/**
 * Representation of an error page element for a web application, as represented in a <code>&lt;error-page&gt;</code>
 * element in the deployment descriptor.
 */
public class ErrorPage extends XmlEncodingBase implements Serializable {

    private static final long serialVersionUID = 2L;


    // ----------------------------------------------------- Instance Variables

    /**
     * The error (status) code for which this error page is active. Note that status code 0 is used for the default
     * error page.
     */
    private int errorCode = 0;


    /**
     * The exception type for which this error page is active.
     */
    private String exceptionType = null;


    /**
     * The context-relative location to handle this error or exception.
     */
    private String location = null;


    // ------------------------------------------------------------- Properties


    /**
     * @return the error code.
     */
    public int getErrorCode() {
        return this.errorCode;
    }


    /**
     * Set the error code.
     *
     * @param errorCode The new error code
     */
    public void setErrorCode(int errorCode) {
        this.errorCode = errorCode;
    }


    /**
     * Set the error code (hack for default XmlMapper data type).
     *
     * @param errorCode The new error code
     */
    public void setErrorCode(String errorCode) {

        try {
            this.errorCode = Integer.parseInt(errorCode);
        } catch (NumberFormatException nfe) {
            throw new IllegalArgumentException(nfe);
        }
    }


    /**
     * @return the exception type.
     */
    public String getExceptionType() {
        return this.exceptionType;
    }


    /**
     * Set the exception type.
     *
     * @param exceptionType The new exception type
     */
    public void setExceptionType(String exceptionType) {
        this.exceptionType = exceptionType;
    }


    /**
     * @return the location.
     */
    public String getLocation() {
        return this.location;
    }


    /**
     * Set the location.
     *
     * @param location The new location
     */
    public void setLocation(String location) {
        this.location = UDecoder.URLDecode(location, getCharset());
    }


    // --------------------------------------------------------- Public Methods


    /**
     * Render a String representation of this object.
     */
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder("ErrorPage[");
        if (exceptionType == null) {
            sb.append("errorCode=");
            sb.append(errorCode);
        } else {
            sb.append("exceptionType=");
            sb.append(exceptionType);
        }
        sb.append(", location=");
        sb.append(location);
        sb.append(']');
        return sb.toString();
    }

    public String getName() {
        return Objects.requireNonNullElseGet(exceptionType, () -> Integer.toString(errorCode));
    }

}
