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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
TableView.java | 0% | 0% | 0% | 0% |
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// Copyright 2004, 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.tapestry.contrib.table.components;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.List;
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import org.apache.hivemind.ApplicationRuntimeException;
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import org.apache.tapestry.BaseComponent;
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import org.apache.tapestry.IComponent;
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import org.apache.tapestry.IMarkupWriter;
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import org.apache.tapestry.IRequestCycle;
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import org.apache.tapestry.contrib.table.model.IBasicTableModel;
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import org.apache.tapestry.contrib.table.model.ITableColumn;
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import org.apache.tapestry.contrib.table.model.ITableColumnModel;
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import org.apache.tapestry.contrib.table.model.ITableDataModel;
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import org.apache.tapestry.contrib.table.model.ITableModel;
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import org.apache.tapestry.contrib.table.model.ITableModelSource;
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import org.apache.tapestry.contrib.table.model.ITablePagingState;
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import org.apache.tapestry.contrib.table.model.ITableSessionStateManager;
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import org.apache.tapestry.contrib.table.model.ITableSessionStoreManager;
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import org.apache.tapestry.contrib.table.model.common.BasicTableModelWrap;
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import org.apache.tapestry.contrib.table.model.simple.SimpleListTableDataModel;
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import org.apache.tapestry.contrib.table.model.simple.SimpleTableColumnModel;
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import org.apache.tapestry.contrib.table.model.simple.SimpleTableModel;
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import org.apache.tapestry.contrib.table.model.simple.SimpleTableState;
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import org.apache.tapestry.event.PageBeginRenderListener;
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import org.apache.tapestry.event.PageDetachListener;
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import org.apache.tapestry.event.PageEvent;
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/**
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* A low level Table component that wraps all other low level Table components. This component
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* carries the {@link org.apache.tapestry.contrib.table.model.ITableModel}that is used by the other
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* Table components. Please see the documentation of
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* {@link org.apache.tapestry.contrib.table.model.ITableModel}if you need to know more about how a
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* table is represented.
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* <p>
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* This component also handles the saving of the state of the model using an
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* {@link org.apache.tapestry.contrib.table.model.ITableSessionStateManager}to determine what part
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* of the model is to be saved and an
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* {@link org.apache.tapestry.contrib.table.model.ITableSessionStoreManager}to determine how to
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* save it.
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* <p>
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* Upon the beginning of a new request cycle when the table model is first needed, the model is
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* obtained using the following process:
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* <ul>
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* <li>The persistent state of the table is loaded. If the tableSessionStoreManager binding has not
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* been bound, the state is loaded from a persistent property within the component (it is null at
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* the beginning). Otherwise the supplied
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* {@link org.apache.tapestry.contrib.table.model.ITableSessionStoreManager}is used to load the
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* persistent state.
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* <li>The table model is recreated using the
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* {@link org.apache.tapestry.contrib.table.model.ITableSessionStateManager}that could be supplied
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* using the tableSessionStateManager binding (but has a default value and is therefore not
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* required).
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* <li>If the {@link org.apache.tapestry.contrib.table.model.ITableSessionStateManager}returns
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* null, then a table model is taken from the tableModel binding. Thus, if the
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* {@link org.apache.tapestry.contrib.table.model.common.NullTableSessionStateManager}is used, the
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* table model would be taken from the tableModel binding every time.
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* </ul>
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* Just before the rendering phase the persistent state of the model is saved in the session. This
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* process occurs in reverse:
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* <ul>
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* <li>The persistent state of the model is taken via the
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* {@link org.apache.tapestry.contrib.table.model.ITableSessionStateManager}.
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* <li>If the tableSessionStoreManager binding has not been bound, the persistent state is saved as
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* a persistent page property. Otherwise the supplied
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* {@link org.apache.tapestry.contrib.table.model.ITableSessionStoreManager}is used to save the
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* persistent state. Use of the
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* {@link org.apache.tapestry.contrib.table.model.ITableSessionStoreManager}is usually necessary
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* when tables with the same model have to be used across multiple pages, and hence the state has to
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* be saved in the Visit, rather than in a persistent component property.
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* </ul>
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* <p>
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* <p>
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* Please see the Component Reference for details on how to use this component. [ <a
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* href="../../../../../../../ComponentReference/contrib.TableView.html">Component Reference </a>]
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*
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* @author mindbridge
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*/
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public abstract class TableView extends BaseComponent implements PageDetachListener, |
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PageBeginRenderListener, ITableModelSource |
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{ |
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/** @since 4.0 */
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public abstract TableColumnModelSource getModelSource();
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// Component properties
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private ITableSessionStateManager m_objDefaultSessionStateManager = null; |
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private ITableColumnModel m_objColumnModel = null; |
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// Transient objects
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private ITableModel m_objTableModel;
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private ITableModel m_objCachedTableModelValue;
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// enhanced parameter methods
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public abstract ITableModel getTableModelValue();
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public abstract Object getSource();
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public abstract Object getColumns();
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public abstract int getInitialPage(); |
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public abstract String getInitialSortColumn();
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public abstract boolean getInitialSortOrder(); |
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public abstract ITableSessionStateManager getTableSessionStateManager();
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public abstract ITableSessionStoreManager getTableSessionStoreManager();
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public abstract IComponent getColumnSettingsContainer();
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public abstract int getPageSize(); |
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// enhanced property methods
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public abstract Serializable getSessionState();
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public abstract void setSessionState(Serializable sessionState); |
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/**
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* The component constructor. Invokes the component member initializations.
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*/
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public TableView()
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{ |
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initialize(); |
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} |
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/**
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* Invokes the component member initializations.
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*
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* @see org.apache.tapestry.event.PageDetachListener#pageDetached(PageEvent)
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*/
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public void pageDetached(PageEvent objEvent) |
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{ |
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initialize(); |
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} |
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/**
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* Initialize the component member variables.
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*/
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private void initialize() |
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{ |
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m_objTableModel = null;
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m_objCachedTableModelValue = null;
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} |
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/**
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* Resets the table by removing any stored table state. This means that the current column to
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* sort on and the current page will be forgotten and all data will be reloaded.
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*/
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170 | 0 |
public void reset() |
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{ |
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initialize(); |
173 | 0 |
storeSessionState(null);
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} |
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public ITableModel getCachedTableModelValue()
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{ |
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178 | 0 |
if (m_objCachedTableModelValue == null) |
179 | 0 |
m_objCachedTableModelValue = getTableModelValue(); |
180 | 0 |
return m_objCachedTableModelValue;
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} |
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/**
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* Returns the tableModel.
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*
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* @return ITableModel the table model used by the table components
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*/
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188 | 0 |
public ITableModel getTableModel()
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{ |
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// if null, first try to recreate the model from the session state
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191 | 0 |
if (m_objTableModel == null) |
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{ |
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Serializable objState = loadSessionState(); |
194 | 0 |
m_objTableModel = getTableSessionStateManager().recreateTableModel(objState); |
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} |
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// if the session state does not help, get the model from the binding
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if (m_objTableModel == null) |
199 | 0 |
m_objTableModel = getCachedTableModelValue(); |
200 |
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// if the model from the binding is null, build a model from source and columns
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if (m_objTableModel == null) |
203 | 0 |
m_objTableModel = generateTableModel(null);
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205 | 0 |
if (m_objTableModel == null) |
206 | 0 |
throw new ApplicationRuntimeException(TableMessages.missingTableModel(this)); |
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208 | 0 |
return m_objTableModel;
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} |
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/**
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* Generate a table model using the 'source' and 'columns' parameters.
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*
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* @return the newly generated table model
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*/
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216 | 0 |
protected ITableModel generateTableModel(SimpleTableState objState)
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{ |
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// create a new table state if none is passed
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219 | 0 |
if (objState == null) |
220 |
{ |
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objState = new SimpleTableState();
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objState.getSortingState().setSortColumn(getInitialSortColumn(), getInitialSortOrder()); |
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objState.getPagingState().setCurrentPage(getInitialPage()); |
224 |
} |
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// update the page size if set in the parameter
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227 | 0 |
if (isParameterBound("pageSize")) |
228 | 0 |
objState.getPagingState().setPageSize(getPageSize()); |
229 |
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// get the column model. if not possible, return null.
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231 | 0 |
ITableColumnModel objColumnModel = getTableColumnModel(); |
232 | 0 |
if (objColumnModel == null) |
233 | 0 |
return null; |
234 |
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235 | 0 |
Object objSourceValue = getSource(); |
236 | 0 |
if (objSourceValue == null) |
237 | 0 |
return null; |
238 |
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239 |
// if the source parameter is of type {@link IBasicTableModel},
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// create and return an appropriate wrapper
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241 | 0 |
if (objSourceValue instanceof IBasicTableModel) |
242 | 0 |
return new BasicTableModelWrap((IBasicTableModel) objSourceValue, objColumnModel, |
243 |
objState); |
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// otherwise, the source parameter must contain the data to be displayed
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246 | 0 |
ITableDataModel objDataModel = null;
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247 | 0 |
if (objSourceValue instanceof Object[]) |
248 | 0 |
objDataModel = new SimpleListTableDataModel((Object[]) objSourceValue);
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249 | 0 |
else if (objSourceValue instanceof List) |
250 | 0 |
objDataModel = new SimpleListTableDataModel((List) objSourceValue);
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251 | 0 |
else if (objSourceValue instanceof Collection) |
252 | 0 |
objDataModel = new SimpleListTableDataModel((Collection) objSourceValue);
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253 | 0 |
else if (objSourceValue instanceof Iterator) |
254 | 0 |
objDataModel = new SimpleListTableDataModel((Iterator) objSourceValue);
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255 |
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256 | 0 |
if (objDataModel == null) |
257 | 0 |
throw new ApplicationRuntimeException(TableMessages.invalidTableSource( |
258 |
this,
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objSourceValue)); |
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260 |
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261 | 0 |
return new SimpleTableModel(objDataModel, objColumnModel, objState); |
262 |
} |
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263 |
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/**
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* Returns the table column model as specified by the 'columns' binding. If the value of the
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* 'columns' binding is of a type different than ITableColumnModel, this method makes the
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* appropriate conversion.
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*
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* @return The table column model as specified by the 'columns' binding
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*/
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271 | 0 |
protected ITableColumnModel getTableColumnModel()
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{ |
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273 | 0 |
Object objColumns = getColumns(); |
274 |
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275 | 0 |
if (objColumns == null) |
276 | 0 |
return null; |
277 |
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278 | 0 |
if (objColumns instanceof ITableColumnModel) |
279 |
{ |
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280 | 0 |
return (ITableColumnModel) objColumns;
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} |
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282 |
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283 | 0 |
if (objColumns instanceof Iterator) |
284 |
{ |
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// convert to List
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286 | 0 |
Iterator objColumnsIterator = (Iterator) objColumns; |
287 | 0 |
List arrColumnsList = new ArrayList();
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288 | 0 |
addAll(arrColumnsList, objColumnsIterator); |
289 | 0 |
objColumns = arrColumnsList; |
290 |
} |
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291 |
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292 | 0 |
if (objColumns instanceof List) |
293 |
{ |
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// validate that the list contains only ITableColumn instances
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295 | 0 |
List arrColumnsList = (List) objColumns; |
296 | 0 |
int nColumnsNumber = arrColumnsList.size();
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297 | 0 |
for (int i = 0; i < nColumnsNumber; i++) |
298 |
{ |
|
299 | 0 |
if (!(arrColumnsList.get(i) instanceof ITableColumn)) |
300 | 0 |
throw new ApplicationRuntimeException(TableMessages.columnsOnlyPlease(this)); |
301 |
} |
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302 |
//objColumns = arrColumnsList.toArray(new ITableColumn[nColumnsNumber]);
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303 | 0 |
return new SimpleTableColumnModel(arrColumnsList); |
304 |
} |
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305 |
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306 | 0 |
if (objColumns instanceof ITableColumn[]) |
307 |
{ |
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308 | 0 |
return new SimpleTableColumnModel((ITableColumn[]) objColumns); |
309 |
} |
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310 |
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311 | 0 |
if (objColumns instanceof String) |
312 |
{ |
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313 | 0 |
String strColumns = (String) objColumns; |
314 | 0 |
if (getBinding("columns").isInvariant()) |
315 |
{ |
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316 |
// if the binding is invariant, create the columns only once
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|
317 | 0 |
if (m_objColumnModel == null) |
318 | 0 |
m_objColumnModel = generateTableColumnModel(strColumns); |
319 | 0 |
return m_objColumnModel;
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320 |
} |
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321 |
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322 |
// if the binding is not invariant, create them every time
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323 | 0 |
return generateTableColumnModel(strColumns);
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324 |
} |
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325 |
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326 | 0 |
throw new ApplicationRuntimeException(TableMessages.invalidTableColumns(this, objColumns)); |
327 |
} |
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328 |
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329 | 0 |
private void addAll(List arrColumnsList, Iterator objColumnsIterator) |
330 |
{ |
|
331 | 0 |
while (objColumnsIterator.hasNext())
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332 | 0 |
arrColumnsList.add(objColumnsIterator.next()); |
333 |
} |
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334 |
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335 |
/**
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336 |
* Generate a table column model out of the description string provided. Entries in the
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337 |
* description string are separated by commas. Each column entry is of the format name,
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338 |
* name:expression, or name:displayName:expression. An entry prefixed with ! represents a
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339 |
* non-sortable column. If the whole description string is prefixed with *, it represents
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340 |
* columns to be included in a Form.
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*
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342 |
* @param strDesc
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343 |
* the description of the column model to be generated
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344 |
* @return a table column model based on the provided description
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345 |
*/
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346 | 0 |
protected ITableColumnModel generateTableColumnModel(String strDesc)
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347 |
{ |
|
348 | 0 |
IComponent objColumnSettingsContainer = getColumnSettingsContainer(); |
349 |
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|
350 | 0 |
return getModelSource().generateTableColumnModel(strDesc, this, objColumnSettingsContainer); |
351 |
} |
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352 |
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353 |
/**
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354 |
* The default session state manager to be used in case no such manager is provided by the
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|
355 |
* corresponding parameter.
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|
356 |
*
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357 |
* @return the default session state manager
|
|
358 |
*/
|
|
359 | 0 |
public ITableSessionStateManager getDefaultTableSessionStateManager()
|
360 |
{ |
|
361 | 0 |
if (m_objDefaultSessionStateManager == null) |
362 | 0 |
m_objDefaultSessionStateManager = new TableViewSessionStateManager(this); |
363 | 0 |
return m_objDefaultSessionStateManager;
|
364 |
} |
|
365 |
|
|
366 |
/**
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|
367 |
* Invoked when there is a modification of the table state and it needs to be saved
|
|
368 |
*
|
|
369 |
* @see org.apache.tapestry.contrib.table.model.ITableModelSource#fireObservedStateChange()
|
|
370 |
*/
|
|
371 | 0 |
public void fireObservedStateChange() |
372 |
{ |
|
373 | 0 |
saveSessionState(); |
374 |
} |
|
375 |
|
|
376 |
/**
|
|
377 |
* Ensures that the table state is saved before the render phase begins in case there are
|
|
378 |
* modifications for which {@link #fireObservedStateChange()}has not been invoked.
|
|
379 |
*
|
|
380 |
* @see org.apache.tapestry.event.PageRenderListener#pageBeginRender(org.apache.tapestry.event.PageEvent)
|
|
381 |
*/
|
|
382 | 0 |
public void pageBeginRender(PageEvent event) |
383 |
{ |
|
384 |
// 'suspenders': save the table model if it has been already loaded.
|
|
385 |
// this means that if a change has been made explicitly in a listener,
|
|
386 |
// it will be saved. this is the last place before committing the changes
|
|
387 |
// where a save can occur
|
|
388 | 0 |
if (m_objTableModel != null) |
389 | 0 |
saveSessionState(); |
390 |
} |
|
391 |
|
|
392 |
/**
|
|
393 |
* Saves the table state using the SessionStateManager to determine what to save and the
|
|
394 |
* SessionStoreManager to determine where to save it.
|
|
395 |
*/
|
|
396 | 0 |
protected void saveSessionState() |
397 |
{ |
|
398 | 0 |
ITableModel objModel = getTableModel(); |
399 | 0 |
Serializable objState = getTableSessionStateManager().getSessionState(objModel); |
400 | 0 |
storeSessionState(objState); |
401 |
} |
|
402 |
|
|
403 |
/**
|
|
404 |
* Loads the table state using the SessionStoreManager.
|
|
405 |
*
|
|
406 |
* @return the stored table state
|
|
407 |
*/
|
|
408 | 0 |
protected Serializable loadSessionState()
|
409 |
{ |
|
410 | 0 |
ITableSessionStoreManager objManager = getTableSessionStoreManager(); |
411 | 0 |
if (objManager != null) |
412 | 0 |
return objManager.loadState(getPage().getRequestCycle());
|
413 | 0 |
return getSessionState();
|
414 |
} |
|
415 |
|
|
416 |
/**
|
|
417 |
* Stores the table state using the SessionStoreManager.
|
|
418 |
*
|
|
419 |
* @param objState
|
|
420 |
* the table state to store
|
|
421 |
*/
|
|
422 | 0 |
protected void storeSessionState(Serializable objState) |
423 |
{ |
|
424 | 0 |
ITableSessionStoreManager objManager = getTableSessionStoreManager(); |
425 | 0 |
if (objManager != null) |
426 | 0 |
objManager.saveState(getPage().getRequestCycle(), objState); |
427 |
else
|
|
428 | 0 |
setSessionState(objState); |
429 |
} |
|
430 |
|
|
431 |
/**
|
|
432 |
* Make sure that the values stored in the model are useable and correct. The changes made here
|
|
433 |
* are not saved.
|
|
434 |
*/
|
|
435 | 0 |
protected void validateValues() |
436 |
{ |
|
437 | 0 |
ITableModel objModel = getTableModel(); |
438 |
|
|
439 |
// make sure current page is within the allowed range
|
|
440 | 0 |
ITablePagingState objPagingState = objModel.getPagingState(); |
441 | 0 |
int nCurrentPage = objPagingState.getCurrentPage();
|
442 | 0 |
int nPageCount = objModel.getPageCount();
|
443 | 0 |
if (nCurrentPage >= nPageCount)
|
444 |
{ |
|
445 |
// the current page is greater than the page count. adjust.
|
|
446 | 0 |
nCurrentPage = nPageCount - 1; |
447 | 0 |
objPagingState.setCurrentPage(nCurrentPage); |
448 |
} |
|
449 | 0 |
if (nCurrentPage < 0)
|
450 |
{ |
|
451 |
// the current page is before the first page. adjust.
|
|
452 | 0 |
nCurrentPage = 0; |
453 | 0 |
objPagingState.setCurrentPage(nCurrentPage); |
454 |
} |
|
455 |
} |
|
456 |
|
|
457 |
/**
|
|
458 |
* Stores a pointer to this component in the Request Cycle while rendering so that wrapped
|
|
459 |
* components have access to it.
|
|
460 |
*
|
|
461 |
* @see org.apache.tapestry.BaseComponent#renderComponent(IMarkupWriter, IRequestCycle)
|
|
462 |
*/
|
|
463 | 0 |
protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
464 |
{ |
|
465 | 0 |
Object objOldValue = cycle.getAttribute(ITableModelSource.TABLE_MODEL_SOURCE_ATTRIBUTE); |
466 | 0 |
cycle.setAttribute(ITableModelSource.TABLE_MODEL_SOURCE_ATTRIBUTE, this);
|
467 |
|
|
468 | 0 |
initialize(); |
469 | 0 |
validateValues(); |
470 | 0 |
super.renderComponent(writer, cycle);
|
471 |
|
|
472 | 0 |
cycle.setAttribute(ITableModelSource.TABLE_MODEL_SOURCE_ATTRIBUTE, objOldValue); |
473 |
} |
|
474 |
|
|
475 |
} |
|