treemodel.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.TreeHandler;
import org.extremecomponents.table.limit.Limit;

/**
 * @author Paul Horn
 */
public final class TreeModel extends BaseModel {
    public TreeModel(PageContext pageContext) {
        super(pageContext);
        properties = new TreeProperties(this);
        tableHandler = new TreeHandler(this);
    }

    /**
     * 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 {
        getTreeHandler().setOpenNodes(getRegistry().getParameters(TableConstants.OPEN));

        boolean filtered = getLimit().isFiltered();
        boolean cleared = getLimit().isCleared();

        if (filtered && !cleared) {
            rows = TableModelUtils.filterRows(this, rows);
            rows = TreeModelUtils.findParents(this, rows);
            rows = TreeModelUtils.loadTreeStructure(this, rows);
            TreeModelUtils.addClosedChildren(this, rows);
        } else {
            rows = TreeModelUtils.loadTreeStructure(this, rows);
        }

        rows = TableModelUtils.sortRows(this, rows);

        getTreeHandler().setFilteredCount(rows);

        return rows;
    }
}