treecell.java

分页查询控件 分页查询控件

/*
 * 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.tree.cell;

import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.extremecomponents.table.cell.BaseCell;
import org.extremecomponents.table.core.ParameterRegistry;
import org.extremecomponents.tree.bean.TreeNode;
import org.extremecomponents.tree.core.TreeModel;
import org.extremecomponents.tree.core.TreeModelUtils;
import org.extremecomponents.util.HtmlBuilder;

/**
 * Will generate a simple cell to display.
 * 
 * @author Jeff Johnston
 */
public class TreeCell extends BaseCell {
    private static Log logger = LogFactory.getLog(TreeCell.class);
    public static final String PLUS_IMAGE = "plus";
    public static final String MINUS_IMAGE = "minus";
    String plus;
    String minus;

    public String html() {
        HtmlBuilder html = new HtmlBuilder();

        html.append(startTD());

        Object value = column.getValue();

        if ((value != null) && StringUtils.isNotEmpty(value.toString())) {
            try {
                TreeModel treeModel = (TreeModel) model;
                TreeNode node = (TreeNode) value;
                html.append(buildNodeCell(treeModel, node));
            } catch (Exception e) {
                logger.error("TreeCell.html() Problem", e);
            }
        } else {
            html.append(" ");
        }

        html.append(endTD());

        return html.toString();
    }

    public String value() {
        Object obj = column.getPropertyValue();
        if (obj != null) {
        	return obj.toString();
        }

        return "";
    }

    private String buildNodeCell(TreeModel model, TreeNode node)
            throws Exception {
        HtmlBuilder html = new HtmlBuilder();

        String val = null;

        if (StringUtils.isNotBlank(model.getExtendedValue())) {
            val = model.getExtendedValue();
        } else if (StringUtils.isNotBlank(column.getProperty())) {
            val = BeanUtils.getProperty(node, column.getProperty());
        }

        if (StringUtils.isBlank(val)) {
            val = "";
        }

        plus = model.getTableHandler().getTable().getImage(PLUS_IMAGE);
        minus = model.getTableHandler().getTable().getImage(MINUS_IMAGE);

        html.table(0).cellPadding("0").cellSpacing("0").border("0").close().tr(1).close();

        for (int i = 0; i < node.getDepth(); i++) {
            html.td(2).close().nbsp().nbsp().nbsp().tdEnd();
        }

        if ((node.getChildren() != null) && (node.getChildren().size() > 0)) {
            buildLink(model, node, val, html);
        } else {
            html.td(2).close().nbsp().nbsp().nbsp().tdEnd(); //Image buffer
            html.td(2).close().nbsp().append(val).tdEnd();
        }

        html.trEnd(1).tableEnd(0);

        return html.toString();
    }

    private void buildLink(TreeModel model, TreeNode node, String val, HtmlBuilder html)
            throws Exception {
        String id = BeanUtils.getProperty(node, model.getIdentifier());

        html.td(2).close();

        html.a().quote();

        String action = model.getTableHandler().getTable().getAction();

        if (StringUtils.isNotEmpty(action)) {
            html.append(action);
        }

        String queryString = model.getRegistry().getURLParameterString(true, false, false, true);

        Map openNodes = model.getOpenNodes();
        Object[] keys = openNodes.keySet().toArray();
        String currentCellOpenKey = TreeModelUtils.getNodeKey(model, id);
        
        boolean whatThe = false;
        
        if (StringUtils.isNotBlank(queryString)) {
            html.question().append(queryString);
            whatThe = true;
        }

        for (int i = 0; i < keys.length; i++) {
            if (keys[i].equals(currentCellOpenKey)) {
                continue;
            }

            if (whatThe) {
                html.ampersand();
            }
            else {
                html.question();
                whatThe = true;
            }

            html.append(keys[i]).equals().append("true");
        }

        html.append(model.getRegistry().getParameterString(ParameterRegistry.SORT));

        if (node.isOpen()) {
            html.quote().title("Close").close();
            html.img(minus).aEnd();
        } else {
            
            if (whatThe) {
                html.ampersand();
            }
            else {
                html.question();
                whatThe = true;
            }
            
            html.append(currentCellOpenKey).equals().append("true");
            html.quote().title("Open").close();
            html.img(plus).aEnd();
        }

        html.tdEnd().td(2).close().nbsp().append(val).tdEnd();
    }
}