viewhandler.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.handler;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.extremecomponents.base.BaseModel;
import org.extremecomponents.base.BaseViewHandler;
import org.extremecomponents.table.bean.Column;
import org.extremecomponents.table.cell.Cell;
import org.extremecomponents.table.view.View;
import org.extremecomponents.tree.core.TreeModel;
import org.extremecomponents.tree.core.TreeProperties;

/**
 * Take care of the view.
 * 
 * @author Jeff Johnston
 */
public class ViewHandler extends BaseViewHandler {
    private static Log logger = LogFactory.getLog(ViewHandler.class);

    public ViewHandler(BaseModel model) {
        super(model);
    }

    public void setView()
            throws Exception {
        boolean invokeExport = getModel().getExportHandler().invokeExport();

        if (invokeExport) {
            String view = getModel().getExportHandler().getCurrentExport().getView();

            if (StringUtils.isNotBlank(view)) {
                Class classDefinition = Class.forName(((TreeModel) getModel()).getTreeProperties().getProperty(
                        TreeProperties.VIEW + view.toLowerCase()));
                setView((View) classDefinition.newInstance());
                getView().beforeBody(getModel());
            }
        } else {
            Class classDefinition = Class.forName(((TreeModel) getModel()).getTreeProperties().getProperty(
                    TreeProperties.VIEW_HTML));
            setView((View) classDefinition.newInstance());
            getView().beforeBody(getModel());
        }
    }

    public void addColumnValue(String property, Object value, Object propertyValue) {
        Column column = getModel().getColumnHandler().getColumn(property);

        if (column != null) {
            Cell cell = buildCell(column, value, propertyValue);
            column.setValue(cell.html());
            boolean isFirstColumn = getModel().getColumnHandler().isFirstColumn(property);
            boolean isLastColumn = getModel().getColumnHandler().isLastColumn(property);
            getView().body(getModel(), column, isFirstColumn, isLastColumn);
            cell.destroy();
        }
    }

    /**
     * Build up the cells in the row. Will either load up a known cell type, or
     * just instantiate a new Cell using the fully qualified package name.
     */
    private Cell buildCell(Column column, Object value, Object propertyValue) {
        Cell result = null;

        String cell = column.getCell();
        String className = ((TreeModel) getModel()).getTreeProperties().getProperty(TreeProperties.CELL + cell);

        if (className == null) //a custom cell
        {
            className = cell;
        }

        try {
            result = getModel().getCachedCell(Class.forName(className));
            column.setValue(value);
            column.setPropertyValue(propertyValue);
            result.init(getModel(), column, new Integer(rowcount()));
        } catch (Exception e) {
            logger.error("ViewHandler.buildCell()", e);
        }

        return result;
    }
}