/**
* AnalyzerBeans
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.eobjects.analyzer.beans.transform;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.inject.Inject;
import org.eobjects.analyzer.beans.api.Close;
import org.eobjects.analyzer.beans.api.Initialize;
import org.eobjects.analyzer.beans.api.OutputColumns;
import org.eobjects.analyzer.beans.api.OutputRowCollector;
import org.eobjects.analyzer.beans.api.Provided;
import org.eobjects.analyzer.beans.api.Transformer;
import org.eobjects.analyzer.configuration.AnalyzerBeansConfiguration;
import org.eobjects.analyzer.data.InputColumn;
import org.eobjects.analyzer.data.InputRow;
import org.eobjects.analyzer.data.MockInputRow;
import org.eobjects.analyzer.job.AnalysisJob;
import org.eobjects.analyzer.job.runner.ConsumeRowHandler;
/**
* An abstract transformer that wraps another {@link AnalysisJob}'s
* transformation section and applies it as a single transformation.
*
* This class is abstract since the logic of how the wrapped {@link AnalysisJob}
* is configured/set might differ. Some implementations might simply have a
* hardcoded job configured, others might dynamically load it from a file.
*/
public abstract class AbstractWrappedAnalysisJobTransformer implements Transformer<Object> {
@Inject
@Provided
AnalyzerBeansConfiguration _analyzerBeansConfiguration;
@Inject
@Provided
OutputRowCollector _outputRowCollector;
private AnalysisJob _wrappedAnalysisJob;
private ConsumeRowHandler _consumeRowHandler;
private Map<InputColumn<?>, InputColumn<?>> _inputColumnConversion;
private List<InputColumn<?>> _outputColumns;
/**
* Provides the analysis job to wrap.
*
* @return
*/
protected abstract AnalysisJob createWrappedAnalysisJob();
/**
* Provides the conversion map for input columns. Keys are expected to be
* columns of the parent/owning job, and values are expected to be columns
* of the embedded/wrapped job.
*
* @param wrappedAnalysisJob
*
* @return
*/
protected abstract Map<InputColumn<?>, InputColumn<?>> getInputColumnConversion(AnalysisJob wrappedAnalysisJob);
@Initialize
public void init() {
if (!reInitialize(_wrappedAnalysisJob, _outputColumns)) {
return;
}
_wrappedAnalysisJob = createWrappedAnalysisJob();
if (_wrappedAnalysisJob == null) {
throw new IllegalStateException("Wrapped AnalysisJob cannot be null");
}
final ConsumeRowHandler.Configuration configuration = new ConsumeRowHandler.Configuration();
configuration.includeAnalyzers = false;
_consumeRowHandler = new ConsumeRowHandler(_wrappedAnalysisJob, _analyzerBeansConfiguration, configuration);
_inputColumnConversion = getInputColumnConversion(_wrappedAnalysisJob);
_outputColumns = _consumeRowHandler.getOutputColumns();
}
/**
* Determines if the transformer should reinitialize it's
* {@link ConsumeRowHandler}, output columns etc. based on a set of existing
* values.
*
* The default implementation returns false when non-null values are
* available
*
* @param wrappedAnalysisJob
* @param outputColumns
* @return
*/
protected boolean reInitialize(AnalysisJob wrappedAnalysisJob, List<InputColumn<?>> outputColumns) {
if (wrappedAnalysisJob != null && outputColumns != null && !outputColumns.isEmpty()) {
return false;
}
return true;
}
@Close
public void close() {
_consumeRowHandler = null;
_inputColumnConversion = null;
_outputColumns = null;
}
@Override
public OutputColumns getOutputColumns() {
init();
final int size = _outputColumns.size();
final String[] names = new String[size];
final Class<?>[] types = new Class[size];
for (int i = 0; i < size; i++) {
InputColumn<?> outputColumn = _outputColumns.get(0);
names[i] = outputColumn.getName();
types[i] = outputColumn.getDataType();
}
return new OutputColumns(names, types);
}
@Override
public Object[] transform(final InputRow parentInputRow) {
final MockInputRow wrappedInputRow = new MockInputRow(parentInputRow.getId());
final Set<Entry<InputColumn<?>, InputColumn<?>>> conversionEntries = _inputColumnConversion.entrySet();
for (final Entry<InputColumn<?>, InputColumn<?>> conversionEntry : conversionEntries) {
final InputColumn<?> parentColumn = conversionEntry.getKey();
final Object value = parentInputRow.getValue(parentColumn);
final InputColumn<?> wrappedColumn = conversionEntry.getValue();
wrappedInputRow.put(wrappedColumn, value);
}
final List<InputRow> outputRows = _consumeRowHandler.consumeRow(wrappedInputRow).getRows();
for (InputRow wrappedOutputRow : outputRows) {
final Object[] outputValues = convertToOutputValues(wrappedOutputRow);
_outputRowCollector.putValues(outputValues);
}
return null;
}
private Object[] convertToOutputValues(InputRow wrappedOutputRow) {
Object[] result = new Object[_outputColumns.size()];
for (int i = 0; i < result.length; i++) {
InputColumn<?> outputColumn = _outputColumns.get(i);
Object value = wrappedOutputRow.getValue(outputColumn);
result[i] = value;
}
return result;
}
public AnalyzerBeansConfiguration getAnalyzerBeansConfiguration() {
return _analyzerBeansConfiguration;
}
public OutputRowCollector getOutputRowCollector() {
return _outputRowCollector;
}
}