columntag.java

exTreme taglib的使用

     *                the correct cell can be resolved. For instance, a date
     *                needs to be parsed in the specific format, such as
     *                MM-dd-yyyy." required="false" rtexprvalue="true"
     */
    public String getParse() {
        String parse = TagUtils.evaluateExpressionAsString("parse", this.parse, this, pageContext);
        return ColumnTagUtils.getParse(TagUtils.getModel(this), parse, getCell());
    }

    public void setParse(String parse) {
        this.parse = parse;
    }

    /**
     * @jsp.attribute description="Specify whether or not the column should be
     *                filterable. Acceptable values are true or false."
     *                required="false" rtexprvalue="true"
     */
    public String getFilterable() {
        String filterable = TagUtils.evaluateExpressionAsString("filterable", this.filterable, this, pageContext);
        return ColumnTagUtils.getFilterable(TagUtils.getModel(this), filterable);
    }

    public void setFilterable(String filterable) {
        this.filterable = filterable;
    }

    /**
     * @jsp.attribute description="Specify whether or not the column should be
     *                sortable. The acceptable values are true or false."
     *                required="false" rtexprvalue="true"
     */
    public String getSortable() {
        String sortable = TagUtils.evaluateExpressionAsString("sortable", this.sortable, this, pageContext);
        return ColumnTagUtils.getSortable(TagUtils.getModel(this), sortable);
    }

    public void setSortable(String sortable) {
        this.sortable = sortable;
    }

    /**
     * @jsp.attribute description="Specify the column width." required="false"
     *                rtexprvalue="true"
     */
    public String getWidth() {
        String width = TagUtils.evaluateExpressionAsString("width", this.width, this, pageContext);
        return ColumnTagUtils.getWidth(TagUtils.getModel(this), width);
    }

    public void setWidth(String width) {
        this.width = width;
    }

    /**
     * @jsp.attribute description="The css inline style sheet." required="false"
     *                rtexprvalue="true"
     */
    public String getStyle() {
        String style = TagUtils.evaluateExpressionAsString("style", this.style, this, pageContext);
        return ColumnTagUtils.getStyle(TagUtils.getModel(this), style);
    }

    public void setStyle(String style) {
        this.style = style;
    }

    /**
     * @jsp.attribute description="Specify whether or not the total for the
     *                column should be displayed. The acceptable values are true
     *                or false." required="false" rtexprvalue="true"
     */
    public String getShowTotal() {
        String showTotal = TagUtils.evaluateExpressionAsString("showTotal", this.showTotal, this, pageContext);
        return ColumnTagUtils.getShowTotal(TagUtils.getModel(this), showTotal);
    }

    public void setShowTotal(String showTotal) {
        this.showTotal = showTotal;
    }

    /**
     * @jsp.attribute description="The comma separated list of Views that this
     *                column will be used in." required="false"
     *                rtexprvalue="true"
     */
    public String getViewsAllowed() {
        String viewsToAllow = TagUtils.evaluateExpressionAsString("viewsToAllow", this.viewsAllowed, this, pageContext);
        return ColumnTagUtils.getViewsAllowed(TagUtils.getModel(this), viewsToAllow);
    }

    public void setViewsAllowed(String viewsAllowed) {
        this.viewsAllowed = viewsAllowed;
    }

    /**
     * @jsp.attribute description="The comma separated list of Views that this
     *                column will be used in." required="false"
     *                rtexprvalue="true"
     */
    public String getViewsDenied() {
        String viewsToDeny = TagUtils.evaluateExpressionAsString("viewsToDeny", this.viewsDenied, this, pageContext);
        return ColumnTagUtils.getViewsDenied(TagUtils.getModel(this), viewsToDeny);
    }

    public void setViewsDenied(String viewsDenied) {
        this.viewsDenied = viewsDenied;
    }

    /**
     * Get the value for the column. First look to see if it displayed in the
     * body of the column. If it is not in the body, then use the value
     * attribute. If the value attribute is not specified then use the property
     * attribute to find the value in the bean. Note: Weblogic will always
     * return a bodyContent so do additional checking.
     */
    protected Object getColumnValue(Object propertyValue)
            throws JspException {
        Object result = value;

        if (result == null && bodyContent != null) {
            result = getBodyContent().getString();
        }

        if (result != null) {
            result = ExpressionEvaluatorManager.evaluate("result", result.toString(), Object.class, this, pageContext);
        }

        if (result == null || (result != null && result instanceof String && StringUtils.isBlank(result.toString()))) {
            result = propertyValue;
        }

        return result;
    }

    protected Object getColumnPropertyValue()
            throws JspException {
        Object result = null;

        try {
            Object bean = TagUtils.getModel(this).getCurrentCollectionBean();
            if (ExtremeUtils.isBeanPropertyReadable(bean, getProperty())) {
                result = PropertyUtils.getProperty(bean, getProperty());
            }
        } catch (Exception e) {
            String collection = TagUtils.getModel(this).getTableHandler().getTable().getTableId();
            String message = "Could not find the property " + getProperty() + " in " + collection;
            logger.error(message);
            throw new JspException(message);
        }

        return result;
    }

    public int doStartTag()
            throws JspException {
        if (!TagUtils.isIteratingBody(this)) {
            return SKIP_BODY;
        }

        return EVAL_BODY_BUFFERED;
    }

    /**
     * Must make a copy of the column because this tag may be reused. Send the
     * copy up to the Model.
     */
    public int doEndTag()
            throws JspException {
        if (TagUtils.isIteratingBody(this)) {
            Object propertyValue = getColumnPropertyValue();
            TagUtils.getModel(this).getViewHandler().addColumnValue(getProperty(), getColumnValue(propertyValue),
                    propertyValue);
        } else {
            Column column = new Column();
            column.addAttribute(Column.PROPERTY, getProperty());
            column.addAttribute(Column.CELL, getCell());
            column.addAttribute(Column.TITLE, getTitle());
            column.addAttribute(Column.STYLE_CLASS, getStyleClass());
            column.addAttribute(Column.STYLE, getStyle());
            column.addAttribute(Column.HEADER_CLASS, getHeaderClass());
            column.addAttribute(Column.HEADER_STYLE, getHeaderStyle());
            column.addAttribute(Column.FILTER_CLASS, getFilterClass());
            column.addAttribute(Column.FILTER_STYLE, getFilterStyle());
            column.addAttribute(Column.FILTER_CELL, getFilterCell());
            column.addAttribute(Column.HEADER_CELL, getHeaderCell());
            column.addAttribute(Column.FORMAT, getFormat());
            column.addAttribute(Column.PARSE, getParse());
            column.addAttribute(Column.SORTABLE, getSortable());
            column.addAttribute(Column.FILTERABLE, getFilterable());
            column.addAttribute(Column.WIDTH, getWidth());
            column.addAttribute(Column.VIEWS_ALLOWED, getViewsAllowed());
            column.addAttribute(Column.VIEWS_DENIED, getViewsDenied());
            column.addAttribute(Column.SHOW_TOTAL, getShowTotal());
            addExtendedAttributes(column);
            TagUtils.getModel(this).getColumnHandler().addColumn(column);
        }

        if (bodyContent != null) {
            bodyContent.clearBody();
        }

        return EVAL_PAGE;
    }

    public void addExtendedAttributes(Attributes attributes)
            throws JspException {
    }

    public void release() {
        property = null;
        value = null;
        title = null;
        styleClass = null;
        headerClass = null;
        headerStyle = null;
        filterClass = null;
        filterStyle = null;
        cell = null;
        filterCell = null;
        headerCell = null;
        format = null;
        parse = null;
        width = null;
        style = null;
        showTotal = null;
        filterable = null;
        sortable = null;
        viewsAllowed = null;
        viewsDenied = null;
        super.release();
    }
}