com.ewcms.publication.freemarker.directive.page.skip.PreviousSkip.java Source code

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Here is the source code for com.ewcms.publication.freemarker.directive.page.skip.PreviousSkip.java

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/**
 * Copyright (c)2010-2011 Enterprise Website Content Management System(EWCMS), All rights reserved.
 * EWCMS PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 * http://www.ewcms.com
 */

package com.ewcms.publication.freemarker.directive.page.skip;

import java.util.Map;

import org.apache.commons.lang3.StringUtils;

import com.ewcms.publication.PublishException;
import com.ewcms.publication.freemarker.GlobalVariable;
import com.ewcms.publication.freemarker.directive.page.PageOut;
import com.ewcms.publication.uri.UriRuleable;

/**
 * ""
 * 
 * @author <a href="hhywangwei@gmail.com"></a>
 */
public class PreviousSkip implements Skipable {

    private static final String DEFAULT_LABEL = "";

    @Override
    public PageOut skip(Integer count, Integer number, String label, UriRuleable uriRule,
            Map<String, Object> uriParams) throws PublishException {

        label = StringUtils.isBlank(label) ? DEFAULT_LABEL : label;
        --number;
        boolean active = (number >= 0);
        int prev = number <= 0 ? 0 : (number);
        String url = uriRule.uri(putPageParam(uriParams, prev));

        return new PageOut(count, prev, label, url, active);
    }

    private Map<String, Object> putPageParam(Map<String, Object> uriParams, Integer page) {
        uriParams.put(GlobalVariable.PAGE_NUMBER.getVariable(), page);
        return uriParams;
    }
}