tablemodel.java

exTreme taglib的使用

/*
 * Copyright 2004 original author or authors.
 *
 * Licensed 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.extremecomponents.table.core;

import java.util.Collection;

import javax.servlet.jsp.PageContext;

import org.extremecomponents.table.handler.TableHandler;
import org.extremecomponents.table.handler.TotalHandler;
import org.extremecomponents.table.limit.Limit;
import org.extremecomponents.table.limit.ModelLimitFactory;

/**
 * Build up a Model that represents the table. This is the main reference point
 * to all objects that are needed to build the table display up.
 * 
 * @author Jeff Johnston
 */
public final class TableModel extends BaseModel {
    private TotalHandler totalHander = new TotalHandler(this);

    public TableModel(PageContext pageContext) {
        super(pageContext);
        properties = new TableProperties(this);
        tableHandler = new TableHandler(this);
    }

    public TotalHandler getTotalHandler() {
        return totalHander;
    }

    /**
     * Do all the filtering and sorting and return the rows of the table that
     * need to be displayed.
     */
    Collection executeInternal(Collection rows, Limit limit)
            throws Exception {
        rows = TableModelUtils.filterRows(this, rows);

        getTotalHandler().buildTotals(rows); // TODO: move out to a utility
                                                // class

        rows = TableModelUtils.sortRows(this, rows);

        ModelLimitFactory.setLimitPageAndRowAttr(limit, rows.size());

        rows = TableModelUtils.currentRows(this, rows);

        return rows;
    }

    public void destroy() {
        totalHander = null;
        super.destroy();
    }
}