basepagertag.java

struts+spring+hibernate自创框架

package com.pegasus.framework.component.taglib.html.pager;

import java.io.IOException;
import java.util.Vector;

import javax.servlet.jsp.JspException;

import org.apache.struts.Globals;

import com.pegasus.framework.component.taglib.util.BaseBodySupportTag;
import com.pegasus.framework.component.taglib.util.JspResponseWriter;


public abstract class BasePagerTag extends BaseBodySupportTag {

	/** The logger. */
	//private Logger logger = LogManager.getLogger(BasePagerTag.class);

	/** The Constant DEFAULT_INPUT_SIZE. */
	protected static final int DEFAULT_INPUT_SIZE = 3;

	/** The Constant DEFAULT_INPUT_MAXLENGTH. */
	protected static final int DEFAULT_INPUT_MAXLENGTH = 5;

	/** The Constant DEFAULT_PAGE_NUMBER. */
	protected static final int DEFAULT_PAGE_NUMBER = 10;

	/** The Constant DEFAULT_FETCH_SIZE. */
	protected static final int DEFAULT_FETCH_SIZE = 5;

	/** The Constant PAGE_TYPE_LINK. */
	protected static final String PAGE_TYPE_LINK = "link";

	/** The Constant PAGE_TYPE_IMG. */
	protected static final String PAGE_TYPE_IMG = "img";

	/** The Constant PAGE_TYPE_BTN. */
	protected static final String PAGE_TYPE_BTN = "btn";

	/** The Constant DEFAULT_PAGE_NO_PROPERTY. */
	protected static final String DEFAULT_PAGE_NO_PROPERTY = "pageAgent.pageNo";

	/** The Constant DEFAULT_FETCH_SIZE_PROPERTY. */
	protected static final String DEFAULT_FETCH_SIZE_PROPERTY = "pageAgent.fetchSize";

	/** The Constant DEFAULT_TOTAL_OBJECT_PROPERTY. */
	protected static final String DEFAULT_TOTAL_OBJECT_PROPERTY = "pageAgent.totalObjectCount";

	/** The Constant DEFAULT_TOTAL_PAGE_COUNT_PROPERTY. */
	protected static final String DEFAULT_TOTAL_PAGE_COUNT_PROPERTY = "pageAgent.totalPageCount";

	/** The name. */
	protected String name = null;

	/** The page no property. */
	protected String pageNoProperty = DEFAULT_PAGE_NO_PROPERTY;

	/** The fetch size property. */
	protected String fetchSizeProperty = DEFAULT_FETCH_SIZE_PROPERTY;

	/** The total object count property. */
	protected String totalObjectCountProperty = DEFAULT_TOTAL_OBJECT_PROPERTY;

	/** The total page count property. */
	protected String totalPageCountProperty = DEFAULT_TOTAL_PAGE_COUNT_PROPERTY;

	/** The scope. */
	protected String scope = null;

	/** The table style class. */
	protected String tableStyleClass = null;

	/** The td style class. */
	protected String tdStyleClass = null;

	/** The input style class. */
	protected String inputStyleClass = null;

	/** The btn style class. */
	protected String btnStyleClass = null;

	/** The table style. */
	protected String tableStyle = null;

	/** The td style. */
	protected String tdStyle = null;

	/** The input style. */
	protected String inputStyle = null;

	/** The btn style. */
	protected String btnStyle = null;

	/** The page type. */
	protected String pageType = PAGE_TYPE_LINK;

	/** The use resource. */
	protected boolean useResource = false;

	/** The bundle. */
	protected String bundle = Globals.MESSAGES_KEY;

	/** The url. */
	protected String url = null;

	/** The first img. */
	protected String firstImg = null;

	/** The pre img. */
	protected String preImg = null;

	/** The next img. */
	protected String nextImg = null;

	/** The last img. */
	protected String lastImg = null;

	/** The first source. */
	protected String firstSource = "First";

	/** The pre source. */
	protected String preSource = "Previous";

	/** The next source. */
	protected String nextSource = "Next";

	/** The last source. */
	protected String lastSource = "Last";

	/** The separator. */
	protected String separator = " ";

	/** The show page number. */
	protected boolean showPageNumber = false;

	/** The max page number. */
	protected int maxPageNumber = DEFAULT_PAGE_NUMBER;

	/** The total object title. */
	protected String totalObjectTitle = "Total object";

	/** The fetch size title. */
	protected String fetchSizeTitle = "Page Size";

	/** The writer. */
	protected JspResponseWriter writer = new JspResponseWriter();

	/** The page no. */
	protected int pageNo = 1;

	/** The fetch size. */
	protected int fetchSize = DEFAULT_FETCH_SIZE;

	/** The total object count. */
	protected int totalObjectCount = 0;

	/** The total page count. */
	protected int totalPageCount = 0;

	/** The fetch size vector. */
	protected static Vector fetchSizeVector = null;

	static {
		fetchSizeVector = new Vector();
		fetchSizeVector.add("5");
		fetchSizeVector.add("10");
		fetchSizeVector.add("20");
		fetchSizeVector.add("30");
		fetchSizeVector.add("40");
		fetchSizeVector.add("50");
		fetchSizeVector.add("100");
		fetchSizeVector.add("200");
	}

	/**
	 * Calculate page.计算总页数
	 * 
	 * @return the int
	 */
	private int calculatePage() {
		int result = 0;
		if (totalObjectCount == 0) {
			result = 0;
		}
		else {
			result = totalObjectCount / fetchSize;
			int d = totalObjectCount % fetchSize;
			if (d > 0)
				result++;
		}
		return result;
	}

	/**
	 * Do start tag.
	 * 
	 * @return the int
	 * 
	 * @throws JspException the jsp exception
	 */
	public int doStartTag() throws JspException {
		// logger.info("doStartTag");

		setPageNo(lookupProperty(name, pageNoProperty));
		setFetchSize(lookupProperty(name, fetchSizeProperty));
		setTotalObjectCount(lookupProperty(name, totalObjectCountProperty));
		setTotalPageCount(lookupProperty(name, totalPageCountProperty));

		//logger.info("pageSize : " + pageNo);
		//logger.info("fecthSize : " + fetchSize);
		//logger.info("totalObjectCount : " + totalObjectCount);
		//logger.info("totalPageCount : " + totalPageCount);

		// 初始化Pager参数
		initPager();

		// 组成javascript
		prepareJs();
		writer.textLineBreak();
		// 组成html
		prepareHtml();

		//logger.info(writer.getBuffer().toString());
		try {
			pageContext.getOut().println(writer.getBuffer().toString());
		}
		catch (IOException e) {
			throw new JspException(e);
		}

		return (EVAL_PAGE);
	}

	/**
	 * Prepare html.组成HTML
	 */
	protected abstract void prepareHtml() throws JspException;

	/**
	 * Prepare js.组成javascript
	 */
	protected abstract void prepareJs() throws JspException;

	/**
	 * Inits the pager.初始化分页标签参数
	 */
	protected abstract void initPager();

	/**
	 * @return
	 * @throws JspException
	 */
	public int doEndTag() throws JspException {
		writer = new JspResponseWriter();
		return EVAL_PAGE;
	}

	/**
	 * 
	 */
	public void release() {

		// logger.info("release");
		reset();
		super.release();
	}

	/**
	 * Reset.
	 */
	private void reset() {
		name = null;
		pageNoProperty = DEFAULT_PAGE_NO_PROPERTY;
		fetchSizeProperty = DEFAULT_FETCH_SIZE_PROPERTY;
		totalObjectCountProperty = DEFAULT_TOTAL_OBJECT_PROPERTY;
		totalPageCountProperty = DEFAULT_TOTAL_PAGE_COUNT_PROPERTY;
		scope = null;
		tableStyleClass = null;
		tdStyleClass = null;
		inputStyleClass = null;
		btnStyleClass = null;
		tableStyle = null;
		tdStyle = null;
		inputStyle = null;
		btnStyle = null;
		tableStyle = null;
		inputStyle = null;
		btnStyle = null;
		pageType = PAGE_TYPE_LINK;
		useResource = false;
		bundle = Globals.MESSAGES_KEY;
		url = null;
		firstImg = null;
		preImg = null;
		nextImg = null;
		lastImg = null;
		firstSource = "First";
		preSource = "Previous";
		nextSource = "Next";
		lastSource = "Last";
		separator = " ";
		showPageNumber = false;
		maxPageNumber = DEFAULT_PAGE_NUMBER;
		totalObjectTitle = "Total object";
		fetchSizeTitle = "Page Size";
		writer = null;
		pageNo = 1;
		fetchSize = DEFAULT_FETCH_SIZE;
		totalObjectCount = 0;
		totalPageCount = 0;
	}

	/**
	 * Sets the total object count.
	 * 
	 * @param totalObjectCount the new total object count
	 */
	public void setTotalObjectCount(String totalObjectCount) {
		if (totalObjectCount == null || totalObjectCount.length() <= 0) {
			this.totalObjectCount = 0;
		}
		else {
			this.totalObjectCount = new Integer(totalObjectCount).intValue();
		}
	}

	/**
	 * Sets the page no.
	 * 
	 * @param pageNo the new page no
	 */
	public void setPageNo(String pageNo) {
		if (pageNo == null || pageNo.length() <= 0) {
			this.pageNo = 1;
		}
		else {
			this.pageNo = new Integer(pageNo).intValue();
		}
	}

	/**
	 * Sets the fetch size.
	 * 
	 * @param fetchSize the new fetch size
	 */
	public void setFetchSize(String fetchSize) {
		if (fetchSize == null || fetchSize.length() <= 0) {
			this.fetchSize = DEFAULT_FETCH_SIZE;
		}
		else {
			this.fetchSize = new Integer(fetchSize).intValue();
		}
	}

	/**
	 * Sets the total page count.
	 * 
	 * @param totalPageCount the new total page count
	 */
	public void setTotalPageCount(String totalPageCount) {
		if (totalPageCount == null || totalPageCount.length() <= 0) {
			this.totalPageCount = calculatePage();
		}
		else {
			this.totalPageCount = new Integer(totalPageCount).intValue();
		}
	}

	/**
	 * Gets the btn style.
	 * 
	 * @return Returns the btnStyle.
	 */
	public String getBtnStyle() {
		return btnStyle;
	}

	/**
	 * Sets the btn style.
	 * 
	 * @param btnStyle The btnStyle to set.
	 */
	public void setBtnStyle(String btnStyle) {
		this.btnStyle = btnStyle;
	}

	/**
	 * Gets the bundle.
	 * 
	 * @return Returns the bundle.
	 */
	public String getBundle() {
		return bundle;
	}

	/**
	 * Sets the bundle.
	 * 
	 * @param bundle The bundle to set.
	 */
	public void setBundle(String bundle) {
		this.bundle = bundle;
	}

	/**
	 * Gets the fetch size property.
	 * 
	 * @return Returns the fetchSizeProperty.
	 */
	public String getFetchSizeProperty() {
		return fetchSizeProperty;
	}

	/**
	 * Sets the fetch size property.
	 * 
	 * @param fetchSizeProperty The fetchSizeProperty to set.
	 */
	public void setFetchSizeProperty(String fetchSizeProperty) {
		this.fetchSizeProperty = fetchSizeProperty;
	}

	/**
	 * Gets the first img.
	 * 
	 * @return Returns the firstImg.
	 */
	public String getFirstImg() {
		return firstImg;
	}

	/**
	 * Sets the first img.
	 * 
	 * @param firstImg The firstImg to set.
	 */
	public void setFirstImg(String firstImg) {
		this.firstImg = firstImg;
	}

	/**
	 * Gets the first source.
	 * 
	 * @return Returns the firstSource.
	 */
	public String getFirstSource() {
		return firstSource;
	}

	/**
	 * Sets the first source.
	 * 
	 * @param firstSource The firstSource to set.
	 */
	public void setFirstSource(String firstSource) {
		this.firstSource = firstSource;
	}

	/**
	 * Gets the input style.
	 * 
	 * @return Returns the inputStyle.
	 */
	public String getInputStyle() {
		return inputStyle;
	}

	/**
	 * Sets the input style.
	 * 
	 * @param inputStyle The inputStyle to set.
	 */
	public void setInputStyle(String inputStyle) {
		this.inputStyle = inputStyle;
	}

	/**
	 * Gets the last img.
	 * 
	 * @return Returns the lastImg.
	 */
	public String getLastImg() {
		return lastImg;
	}

	/**
	 * Sets the last img.
	 * 
	 * @param lastImg The lastImg to set.
	 */
	public void setLastImg(String lastImg) {
		this.lastImg = lastImg;
	}

	/**
	 * Gets the last source.
	 * 
	 * @return Returns the lastSource.
	 */
	public String getLastSource() {
		return lastSource;
	}

	/**
	 * Sets the last source.
	 * 
	 * @param lastSource The lastSource to set.
	 */
	public void setLastSource(String lastSource) {