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|
package fr.improve.struts.taglib.layout.collection;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspException;
import org.apache.struts.taglib.html.Constants;
import org.apache.struts.util.RequestUtils;
import fr.improve.struts.taglib.layout.collection.header.MultiLevelHeader;
import fr.improve.struts.taglib.layout.el.Expression;
import fr.improve.struts.taglib.layout.event.StaticCodeIncludeLayoutEvent;
import fr.improve.struts.taglib.layout.event.StaticCodeIncludeListener;
import fr.improve.struts.taglib.layout.sort.SortUtil;
import fr.improve.struts.taglib.layout.util.IFooterRenderer;
import fr.improve.struts.taglib.layout.util.IMathCollectionRenderer;
import fr.improve.struts.taglib.layout.util.IMultiLevelHeaderRenderer;
import fr.improve.struts.taglib.layout.util.LayoutUtils;
/**
* This class is responsible for displaying the collection.<br />
* Actually, the rendering is done by another class implementing the CollectionInterface.
* This class just computes differents parameters (headers and items).
* @author: Jean-Noel Ribette
**/
public class CollectionTag extends BaseCollectionTag implements StaticCodeIncludeListener {
/**
* Math class
*/
static Class mathClass;
static {
try {
mathClass = RequestUtils.applicationClass("org.apache.commons.math.stat.StatUtils");
} catch (ClassNotFoundException e) {
// Math class is not available.
}
}
/**
* String of the static code to generate.
*/
private String staticCode = "";
/**
* Map of the numbers for operation
*/
protected Map numbers = new HashMap();
/* (non-Javadoc)
* @see fr.improve.struts.taglib.layout.BodyLayoutTagSupport#reset()
*/
protected void reset() {
numbers.clear();
super.reset();
}
/**
* Store in a List the value of the cells for selected column in a map
* @author Damien Viel
* @version 1.0
* @throws JspException
*
*/
protected void storeMathData(double in_value) throws JspException {
if (!isFirst()) {
int lc_ligne = getIndex();
int lc_col = getColumn();
Object bean = getBean();
String property = ((ItemContext)headers.get(lc_col)).getProperty();
String mathOp = ((ItemContext)headers.get(lc_col)).getMathOperation();
if (mathOp!=null) {
String key = String.valueOf(lc_col);
if (!numbers.containsKey(key)){
double[] lc_list = new double[size]; // ???
numbers.put(key,lc_list);
}
double[] lc_list = (double[]) numbers.get(key);
lc_list[index-1] = in_value;
}
}
}
/**
*
* @author Damien Viel
* @param in_operation
* @param in_data
* @return
* @throws JspException
*/
protected String doMathOperation(String in_operation, double[] in_data, String in_mathPattern) throws JspException {
if (in_data!=null && in_operation!=null && in_operation.length()>0){
double total = computeMathResult(in_operation, in_data);
if (in_mathPattern!=null){
NumberFormat lc_format = new DecimalFormat(in_mathPattern);
return lc_format.format(total);
}
return String.valueOf(total);
}
return null;
}
/**
*
* @author JNRibette
* @param in_operation
* @param in_data
* @return
* @throws JspException
*/
protected double computeMathResult(String in_operation, double[] in_data) throws JspException {
if (mathClass==null) {
throw new IllegalStateException("Math operation is not available, please put commons-math.jar in the classpath");
}
Method m;
try {
m = mathClass.getMethod(in_operation, new Class[]{double[].class});
} catch (NoSuchMethodException e) {
throw new IllegalArgumentException("Math operation " + in_operation + " is not supported");
}
Double result = null;
try {
result = (Double) m.invoke(null,new Object[]{in_data});
} catch (InvocationTargetException e) {
// TODO log
throw new JspException("Math operation " + in_operation + " failed : " + e.getMessage());
} catch (IllegalAccessException e) {
// TODO log
throw new JspException("Math operation " + in_operation + " failed : " + e.getMessage());
}
return result.doubleValue();
//return new BigDecimal(result.doubleValue()).setScale(3,BigDecimal.ROUND_HALF_UP).doubleValue();
}
/**
* add an item.
*/
protected void addItem(StringBuffer in_buffer, String in_item, String in_url, String in_target, String in_onclick) throws JspException {
// Display the table cell.
if (in_url==null) {
renderItem(in_buffer, in_item);
} else {
StringBuffer lc_buffer = new StringBuffer();
String lc_item = in_item;
if (sortType==SORT_JAVASCRIPT) {
if (lc_item.startsWith("<!--")) {
// if we are sorting the collection on the client, make sure the resulting item still begin with the comment
// which may be used to sort the items.
int lc_index = lc_item.indexOf("-->");
lc_buffer.append(lc_item.substring(0, lc_index +3));
lc_item = lc_item.substring(lc_index+3);
} else {
// same concern, in case there is no preliminar comment.
lc_buffer.append("<!-- ");
lc_buffer.append(in_item);
lc_buffer.append("-->");
}
}
lc_buffer.append("<a href=\"");
lc_buffer.append(((HttpServletResponse)pageContext.getResponse()).encodeURL(in_url));
if (in_onclick!=null) {
lc_buffer.append("\" onClick=\"");
lc_buffer.append(Expression.evaluate(in_onclick, pageContext));
}
if (in_target!=null) {
lc_buffer.append("\" target=\"");
lc_buffer.append(in_target);
}
String lc_styleClass = styleClass;
if (tempStyleClass != null) lc_styleClass = tempStyleClass;
if (lc_styleClass != null) {
lc_buffer.append("\" class=\"");
lc_buffer.append(lc_styleClass);
}
lc_buffer.append("\">");
lc_buffer.append(lc_item);
lc_buffer.append("</a>");
renderItem(in_buffer, lc_buffer.toString());
}
}
protected void renderBlankCollection(StringBuffer in_buffer) throws JspException {
panel.doPrintEmptyCollection(in_buffer, LayoutUtils.getLabel(pageContext, getBundle(), emptyKey, null, false));
}
// render the end of the table
protected void renderEnd(StringBuffer buffer) throws JspException {
renderMathData(buffer);
renderFooter(buffer);
panel.doEndPanel(buffer);
renderStaticCode(buffer);
}
/**
* Render the result for the specified math operation
* @param in_buffer
* @throws JspException
*/
protected void renderMathData(StringBuffer in_buffer) throws JspException {
if (!(panel instanceof IMathCollectionRenderer)) {
return;
}
IMathCollectionRenderer lc_renderer = (IMathCollectionRenderer) panel;
// did we start generated footer ?
boolean started = false;
// number of null consecutive footer.
int consecutiveNull = 0;
String uniqueParam = mathOperationId;
int lc_nbOfSpan = 0;
for (int i=0; i < headers.size(); i++) {
ItemContext lc_header = (ItemContext) headers.get(i);
String lc_operation = lc_header.getMathOperation();
String lc_mathStyleClass = tempStyleClass!=null ? tempStyleClass : styleClass;
String lc_mathPattern = lc_header.getMathPattern();
double[] data = (double[])numbers.get(String.valueOf(i));
String lc_data = doMathOperation(lc_operation,data,lc_mathPattern);
// Unique identifier for the result cell
String resultId = CollectionInputTag.MATH_ID_PREFIX + "t" + uniqueParam + "r" + i;
// If there is no math operation to do
if (lc_operation==null) {
consecutiveNull++;
} else {
if (!started){
// Start rendering result !
lc_renderer.startMathData(in_buffer);
started = true;
}
// Generate an empty td with colspan = number of consecutive null.
if (consecutiveNull>0) {
lc_renderer.renderMathData(in_buffer, " ", consecutiveNull, null,lc_mathStyleClass);
lc_nbOfSpan = lc_nbOfSpan + consecutiveNull;
}
// Generate the result cell.
lc_renderer.renderMathData(in_buffer, lc_data, 1, resultId,lc_mathStyleClass);
consecutiveNull = 0;
lc_nbOfSpan = lc_nbOfSpan + 1;
}
}
if (started) {
if (headers.size()-lc_nbOfSpan>0){
lc_renderer.renderMathData(in_buffer, " ", headers.size()-lc_nbOfSpan, null,styleClass);
}
// There were result, close.
lc_renderer.endMathData(in_buffer);
}
}
/**
* Render the footer of the collection.
*/
protected void renderFooter(StringBuffer in_buffer) throws JspException {
// Get IFooterRenderer
if (!(panel instanceof IFooterRenderer)) {
return;
}
IFooterRenderer lc_renderer = (IFooterRenderer) panel;
// did we start generated footer ?
boolean started = false;
// number of null consecutive footer.
int consecutiveNull = 0;
for (int i=0; i < headers.size(); i++) {
ItemContext lc_header = (ItemContext) headers.get(i);
String lc_footer = lc_header.getFooter();
if (lc_footer==null) {
consecutiveNull++;
} else {
if (!started){
// Start rendering footer !
lc_renderer.startFooter(in_buffer);
started = true;
}
// Generate an empty td with colspan = number of consecutive null.
if (consecutiveNull>0) {
lc_renderer.printFooterElement(in_buffer, " ", consecutiveNull);
}
// Generate the footer.
Object[] lc_args = new Object[5];
lc_args[0] = Expression.evaluate(lc_header.getFooterArg0(), pageContext);
lc_args[1] = Expression.evaluate(lc_header.getFooterArg1(), pageContext);
String lc_label = LayoutUtils.getLabel(pageContext, getBundle(), lc_footer, lc_args, false);
lc_renderer.printFooterElement(in_buffer, lc_label, 1);
consecutiveNull = 0;
}
}
if (started) {
// There were footer, close.
lc_renderer.endFooter(in_buffer);
}
}
/**
* Print a column title to the buffer.
* (mono level header)
*/
protected void renderHeader(StringBuffer buffer, ItemContext in_header) throws JspException {
// Compute the title.
String lc_key = in_header.getTitle();
String lc_arg0 = Expression.evaluate(in_header.getArg0(), pageContext);
String lc_arg1 = Expression.evaluate(in_header.getArg1(), pageContext);
Object[] lc_args = new Object[2];
lc_args[0] = lc_arg0;
lc_args[1] = lc_arg1;
String lc_title = LayoutUtils.getLabel(pageContext, getBundle(), lc_key, lc_args, false);
// Compute the sort url.
String lc_sortUrl = computeSortUrl(in_header.getSortProperty());
// Print the title.
panel.doPrintHeader(buffer, lc_title, in_header.getWidth(), lc_sortUrl);
}
protected String computeSortUrl(String in_sortProperty) {
String lc_sortUrl = null;
if (in_sortProperty!=null) {
StringBuffer lc_tempBuffer = new StringBuffer();
switch (sortType) {
case SORT_LAYOUT:
String lc_unEncodedUrl = SortUtil.getURLForCollection(in_sortProperty, (javax.servlet.http.HttpServletRequest) pageContext.getRequest());
lc_tempBuffer.append(((HttpServletResponse)pageContext.getResponse()).encodeURL(lc_unEncodedUrl));
break;
case SORT_CUSTOM:
// use user custom sort action.
if (! sortAction.toLowerCase().startsWith("javascript:")) {
// No js code : go to the server to sort.
lc_tempBuffer.append(sortAction);
if (sortAction.indexOf("?")!=-1) lc_tempBuffer.append("&"); else lc_tempBuffer.append("?");
lc_tempBuffer.append(sortParam);
lc_tempBuffer.append("=");
lc_tempBuffer.append(in_sortProperty);
} else {
// Js code : need to put the right parameters at their place.
String javascriptSortParamName = "sortParam";
if (sortParam != null && sortParam.trim().length() > 0) {
javascriptSortParamName = sortParam;
}
pageContext.setAttribute(javascriptSortParamName, in_sortProperty);
lc_tempBuffer.append(Expression.evaluate(sortAction, pageContext));
pageContext.removeAttribute(javascriptSortParamName);
}
break;
case SORT_JAVASCRIPT:
// sorting on the client browser with javascript.
lc_tempBuffer.append("javascript:arraySort(");
lc_tempBuffer.append(sortParam);
lc_tempBuffer.append(",");
/*
* Patch to get the correct column index when using Multi-level headers
* @author OButterlin
*/
// lc_tempBuffer.append(column);
lc_tempBuffer.append(getColumnIndexForProperty(sortProperty));
lc_tempBuffer.append(",");
lc_tempBuffer.append(size);
lc_tempBuffer.append(",");
lc_tempBuffer.append(nbOfColumns);
lc_tempBuffer.append(")");
break;
}
lc_sortUrl = lc_tempBuffer.toString();
}
return lc_sortUrl;
}
/**
* Retrieve column index for property name
* @author OButterlin
*/
private int getColumnIndexForProperty(String name)
{
int idx = 0;
Iterator it = headers.iterator();
while (it.hasNext())
{
BaseCollectionTag.Header header = (BaseCollectionTag.Header)it.next();
if (header.getProperty() != null && header.getProperty().equals(name)) return idx;
idx++;
}
return idx;
}
private MultiLevelHeader currentHeader;
/**
* Print a column title to the buffer.
* (multi level header)
*/
protected void renderMultiLevelHeaders(StringBuffer in_buffer, List in_multiLevelHeaders, int in_level) throws JspException {
if (in_multiLevelHeaders!=null) {
List lc_nestedLevels = null;
Iterator lc_it = in_multiLevelHeaders.iterator();
IMultiLevelHeaderRenderer lc_panel = (IMultiLevelHeaderRenderer) panel;
column = 0;
// Did we start a header row ?
boolean lc_started = false;
while (lc_it.hasNext()) {
MultiLevelHeader lc_header = (MultiLevelHeader) lc_it.next();
List lc_headerChildren = lc_header.getChildHeaders();
int lc_rowSpan = lc_headerChildren!=null ? 1 : in_level+1 - lc_header.getLevel();
Object[] lc_args = new Object[2];
lc_args[0] = Expression.evaluate(lc_header.getArg0(), pageContext);
lc_args[1] = Expression.evaluate(lc_header.getArg1(), pageContext);
String lc_title = LayoutUtils.getLabel(pageContext, getBundle(), lc_header.getTitle(), lc_args, false);
String lc_sortUrl = computeSortUrl(lc_header.getSortProperty());
String lc_styleClass = lc_header.getStyleClass()==null ? getStyleClass() : lc_header.getStyleClass();
String lc_tooltip = LayoutUtils.getLabel(pageContext, getBundle(), lc_header.getTooltip(), null, false);
currentHeader = lc_header;
if (lc_title!=null) {
// Title is not null, render it.
if (!lc_started) {
// First time we render a title, start a title row.
lc_panel.startMultiLevelHeaderRow(in_buffer);
lc_started = true;
}
// Render the title.
lc_panel.renderMultiLevelHeader(in_buffer, lc_title, lc_sortUrl, lc_styleClass, lc_header.getColSpan(), lc_rowSpan, lc_header.getWidth());
}
currentHeader = null;
if (lc_headerChildren!=null) {
if (lc_nestedLevels==null) {
lc_nestedLevels = new ArrayList();
}
lc_nestedLevels.addAll(lc_headerChildren);
}
column++;
}
if(lc_started) {
lc_panel.endMultiLevelHeaderRow(in_buffer);
}
renderMultiLevelHeaders(in_buffer, lc_nestedLevels, in_level-1);
}
}
public MultiLevelHeader getCurrentHeader() {
return currentHeader;
}
protected void renderItem(StringBuffer buffer, String in_item) throws JspException {
String lc_item = in_item;
// if the line of the table are selectable and this is the first column, add a checkbox or a radio button.
if (needSelect && !selectHidden) {
StringBuffer lc_tempBuffer = new StringBuffer();
if (sortType==SORT_JAVASCRIPT && lc_item.startsWith("<!--")) {
// if we are sorting the collection on the client, make sure the resulting item still begin with the comment
// which may be used to sort the items.
int lc_index = lc_item.indexOf("-->");
lc_tempBuffer.append(lc_item.substring(0, lc_index +3));
lc_item = lc_item.substring(lc_index+3);
}
renderSelection(lc_tempBuffer);
needSelect = false;
lc_tempBuffer.append(lc_item);
lc_item = lc_tempBuffer.toString();
}
String[] lc_styleClasses = new String[1 + tempStyles.size()];
lc_styleClasses[0] = tempStyleClass!=null ? tempStyleClass : styleClass;
for (int i=0; i < tempStyles.size(); i++) {
lc_styleClasses[i+1] = (String) tempStyles.get(i);
}
panel.doPrintItem(buffer, lc_item, lc_styleClasses, sortType==SORT_JAVASCRIPT ? "t" + sortParam + "l" + index + "c" + column : null);
}
protected void renderSelection(StringBuffer lc_tempBuffer) throws JspException {
lc_tempBuffer.append("<input type=\"");
if ("checkbox".equalsIgnoreCase(selectType)) {
lc_tempBuffer.append("checkbox");
} else {
lc_tempBuffer.append("radio");
}
lc_tempBuffer.append("\" name=\"");
if (selectName!=null) {
lc_tempBuffer.append(selectName);
} else {
lc_tempBuffer.append(selectProperty);
}
if ("checkbox".equalsIgnoreCase(selectType)) {
if (selectId!=null) {
lc_tempBuffer.append("(");
lc_tempBuffer.append(LayoutUtils.getProperty(bean, selectId));
lc_tempBuffer.append(")");
} else {
lc_tempBuffer.append("[");
lc_tempBuffer.append(index-1);
lc_tempBuffer.append("]");
if (selectIndex!=null) {
lc_tempBuffer.append(".");
lc_tempBuffer.append(selectIndex);
}
}
}
if (onClick!=null) {
lc_tempBuffer.append("\" onclick=\"");
lc_tempBuffer.append(onClick);
}
lc_tempBuffer.append("\" value=\"");
Object lc_value = LayoutUtils.getProperty(bean, selectProperty);
lc_tempBuffer.append(lc_value);
lc_tempBuffer.append("\"");
// check if the value is selected.
if (isCurrentBeanSelected()) {
lc_tempBuffer.append(" checked");
}
lc_tempBuffer.append(">");
}
protected void renderStart(StringBuffer out_buffer) throws JspException {
// Display the title.
// we do not use the possibility of the PanelTag to do that.
Object[] lc_args = new Object[5];
Object lc_arg0 = null;
if (arg0Name!=null) {
lc_arg0 = LayoutUtils.getBeanFromPageContext(pageContext, arg0Name, null);
}
lc_args[0] = lc_arg0;
panel.doPrintTitle(out_buffer, LayoutUtils.getLabel(pageContext, getBundle(), title, lc_args, false));
panel.doStartPanel(out_buffer, align,width);
}
/**
* Returns true if the bean at the current index is selected. Results only valid
* when called once iteration is under way.
* @return boolean
* @throws JspException
* @author LeeFreyberg
*/
public boolean isCurrentBeanSelected() throws JspException{
if (selectName!=null) {
Object lc_selectedValue = null;
if ("checkbox".equalsIgnoreCase(selectType)) {
if (selectId==null) {
lc_selectedValue = LayoutUtils.getBeanFromPageContext(pageContext, Constants.BEAN_KEY, selectName + "[" + (index-1) +"]");
} else {
lc_selectedValue = LayoutUtils.getBeanFromPageContext(pageContext, Constants.BEAN_KEY, selectName + "(" + LayoutUtils.getProperty(bean, selectId) +")");
}
} else {
lc_selectedValue = LayoutUtils.getBeanFromPageContext(pageContext, Constants.BEAN_KEY, selectName);
}
if (lc_selectedValue!=null && lc_selectedValue.equals(LayoutUtils.getProperty(bean, selectProperty))) {
return true;
}
}
return false;
}
public Object processStaticCodeIncludeEvent(StaticCodeIncludeLayoutEvent in_event) throws JspException {
String lc_codeToPrint = (String) in_event.sendToParent(this);
staticCode += lc_codeToPrint;
return "";
}
protected void renderStaticCode(StringBuffer out_buffer) {
if (staticCode.length()>0) {
out_buffer.append(staticCode);
staticCode = "";
}
}
} |
