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package org.apache.tapestry.contrib.table.components; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.StringTokenizer; |
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import org.apache.hivemind.ApplicationRuntimeException; |
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import org.apache.tapestry.IComponent; |
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import org.apache.tapestry.contrib.table.model.IAdvancedTableColumn; |
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import org.apache.tapestry.contrib.table.model.IAdvancedTableColumnSource; |
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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.simple.SimpleTableColumn; |
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import org.apache.tapestry.contrib.table.model.simple.SimpleTableColumnModel; |
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import org.apache.tapestry.services.ExpressionEvaluator; |
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public class TableColumnModelSourceImpl implements TableColumnModelSource |
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{ |
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private ExpressionEvaluator _expressionEvaluator; |
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public void setExpressionEvaluator(ExpressionEvaluator expressionEvaluator) |
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{ |
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_expressionEvaluator = expressionEvaluator; |
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} |
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public ITableColumnModel generateTableColumnModel( |
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IAdvancedTableColumnSource objColumnSource, String strDesc, |
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IComponent objComponent, IComponent objColumnSettingsContainer) |
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{ |
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if (strDesc == null) return null; |
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List arrColumns = new ArrayList(); |
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String desc = strDesc.trim(); |
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boolean bFormColumns = false; |
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while(desc.startsWith("*")) |
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{ |
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desc = desc.substring(1); |
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bFormColumns = true; |
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} |
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StringTokenizer objTokenizer = new StringTokenizer(desc, ","); |
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while(objTokenizer.hasMoreTokens()) |
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{ |
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String strToken = objTokenizer.nextToken().trim(); |
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if (strToken.startsWith("=")) |
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{ |
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String strColumnExpression = strToken.substring(1); |
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Object objColumn = _expressionEvaluator.read( |
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objColumnSettingsContainer, strColumnExpression); |
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if (!(objColumn instanceof ITableColumn)) |
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throw new ApplicationRuntimeException(TableMessages |
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.notAColumn(objComponent, strColumnExpression)); |
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arrColumns.add(objColumn); |
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continue; |
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} |
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boolean bSortable = true; |
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if (strToken.startsWith("!")) |
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{ |
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strToken = strToken.substring(1); |
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bSortable = false; |
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} |
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StringTokenizer objColumnTokenizer = new StringTokenizer(strToken, |
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":"); |
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String strName = ""; |
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if (objColumnTokenizer.hasMoreTokens()) |
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strName = objColumnTokenizer.nextToken(); |
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String strExpression = strName; |
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if (objColumnTokenizer.hasMoreTokens()) |
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strExpression = objColumnTokenizer.nextToken(); |
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String strDisplayName = strName; |
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if (objColumnTokenizer.hasMoreTokens()) |
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{ |
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strDisplayName = strExpression; |
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strExpression = objColumnTokenizer.nextToken(); |
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} |
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IAdvancedTableColumn objColumn = objColumnSource |
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.generateTableColumn(strName, strDisplayName, bSortable, |
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strExpression); |
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if (bFormColumns) |
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objColumn |
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.setColumnRendererSource(SimpleTableColumn.FORM_COLUMN_RENDERER_SOURCE); |
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if (objColumnSettingsContainer != null) |
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objColumn.loadSettings(objColumnSettingsContainer); |
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arrColumns.add(objColumn); |
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} |
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return new SimpleTableColumnModel(arrColumns); |
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} |
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} |