org.apache.wicket.request.mapper.info.PageInfo.java Source code

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Here is the source code for org.apache.wicket.request.mapper.info.PageInfo.java

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/*
 * 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.wicket.request.mapper.info;

import org.apache.wicket.util.string.Strings;

/**
 * Possible string representation of PageInfo:
 * <ul>
 * <li>pageId
 * </ul>
 * 
 * @author Matej Knopp
 */
public class PageInfo {
    private final Integer pageId;

    /**
     * Construct.
     * 
     * @param pageId
     */
    public PageInfo(final Integer pageId) {
        this.pageId = pageId;
    }

    /**
     * Construct.
     */
    public PageInfo() {
        this(null);
    }

    /**
     * @return page id
     */
    public Integer getPageId() {
        return pageId;
    }

    /**
     * The {@link #pageId} as string
     */
    @Override
    public String toString() {
        if (getPageId() == null) {
            return "";
        } else {
            return getPageId().toString();
        }
    }

    /**
     * @param src
     * @return page info instance or <code>null</code> if the string couldn't have been parsed
     */
    public static PageInfo parse(final String src) {
        if (Strings.isEmpty(src)) {
            return new PageInfo();
        } else {
            try {
                return new PageInfo(Integer.valueOf(src));
            } catch (NumberFormatException e) {
                return null;
            }
        }
    }
}