4b2e48614b
Column addition change must track the new cell index that it allocates when it is first applied. git-svn-id: http://google-refine.googlecode.com/svn/trunk@103 7d457c2a-affb-35e4-300a-418c747d4874
54 lines
2.0 KiB
Java
54 lines
2.0 KiB
Java
package com.metaweb.gridworks.model.operations;
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import java.util.ArrayList;
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import java.util.List;
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import org.json.JSONObject;
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import com.metaweb.gridworks.browsing.Engine;
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import com.metaweb.gridworks.browsing.FilteredRows;
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import com.metaweb.gridworks.browsing.RowVisitor;
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import com.metaweb.gridworks.history.HistoryEntry;
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import com.metaweb.gridworks.model.Column;
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import com.metaweb.gridworks.model.Project;
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import com.metaweb.gridworks.model.changes.CellChange;
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import com.metaweb.gridworks.model.changes.MassCellChange;
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abstract public class EngineDependentMassCellOperation extends EngineDependentOperation {
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private static final long serialVersionUID = -8962461328087299452L;
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final protected String _columnName;
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final protected boolean _updateRowContextDependencies;
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protected EngineDependentMassCellOperation(
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JSONObject engineConfig, String columnName, boolean updateRowContextDependencies) {
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super(engineConfig);
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_columnName = columnName;
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_updateRowContextDependencies = updateRowContextDependencies;
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}
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protected HistoryEntry createHistoryEntry(Project project) throws Exception {
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Engine engine = createEngine(project);
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Column column = project.columnModel.getColumnByName(_columnName);
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if (column == null) {
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throw new Exception("No column named " + _columnName);
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}
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List<CellChange> cellChanges = new ArrayList<CellChange>(project.rows.size());
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FilteredRows filteredRows = engine.getAllFilteredRows(false);
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filteredRows.accept(project, createRowVisitor(project, cellChanges));
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String description = createDescription(column, cellChanges);
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MassCellChange massCellChange = new MassCellChange(cellChanges, column.getHeaderLabel(), _updateRowContextDependencies);
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return new HistoryEntry(
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project, description, this, massCellChange);
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}
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abstract protected RowVisitor createRowVisitor(Project project, List<CellChange> cellChanges) throws Exception;
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abstract protected String createDescription(Column column, List<CellChange> cellChanges);
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}
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