/
AbstractTransformer.java
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/
AbstractTransformer.java
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package org.jumpmind.symmetric.transform;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang.ArrayUtils;
import org.apache.commons.lang.StringUtils;
import org.jumpmind.symmetric.common.logging.ILog;
import org.jumpmind.symmetric.common.logging.LogFactory;
import org.jumpmind.symmetric.db.IDbDialect;
import org.jumpmind.symmetric.db.DmlStatement.DmlType;
import org.jumpmind.symmetric.ext.ICacheContext;
import org.jumpmind.symmetric.model.NodeGroupLink;
import org.jumpmind.symmetric.service.IParameterService;
import org.jumpmind.symmetric.util.AppUtils;
public abstract class AbstractTransformer {
protected final ILog log = LogFactory.getLog(getClass());
protected ITransformService transformService;
protected IDbDialect dbDialect;
protected IParameterService parameterService;
protected String tablePrefix;
protected boolean isEligibleForTransform(String catalogName, String schemaName, String tableName) {
return !tableName.toLowerCase().startsWith(tablePrefix);
}
protected List<TransformedData> transform(DmlType dmlType, ICacheContext context,
NodeGroupLink nodeGroupLink, String catalogName, String schemaName, String tableName,
String[] columnNames, String[] columnValues, String[] keyNames, String[] keyValues,
String[] oldData) {
if (isEligibleForTransform(catalogName, schemaName, tableName)) {
String fullyQualifiedName = getFullyQualifiedTableName(catalogName, schemaName, tableName);
List<TransformTable> transformationsToPerform = findTablesToTransform(nodeGroupLink,
fullyQualifiedName);
if (transformationsToPerform != null && transformationsToPerform.size() > 0) {
Map<String, String> sourceValues = AppUtils.toMap(columnNames, columnValues);
Map<String, String> oldSourceValues = AppUtils.toMap(columnNames, oldData);
Map<String, String> sourceKeyValues = oldSourceValues.size() > 0 ? oldSourceValues
: sourceValues;
if (keyNames != null && oldSourceValues.size() == 0) {
sourceKeyValues = AppUtils.toMap(keyNames, keyValues);
}
if (dmlType == DmlType.DELETE) {
sourceValues = oldSourceValues;
}
if (log.isDebugEnabled()) {
log.debug("TransformStarted", transformationsToPerform.size(),
dmlType.toString(), fullyQualifiedName, sourceValues);
}
List<TransformedData> dataThatHasBeenTransformed = new ArrayList<TransformedData>();
for (TransformTable transformation : transformationsToPerform) {
dataThatHasBeenTransformed.addAll(transform(dmlType, context, transformation,
sourceKeyValues, oldSourceValues, sourceValues));
}
return dataThatHasBeenTransformed;
}
}
return null;
}
protected List<TransformedData> transform(DmlType dmlType, ICacheContext context,
TransformTable transformation, Map<String, String> sourceKeyValues,
Map<String, String> oldSourceValues, Map<String, String> sourceValues) {
try {
List<TransformedData> dataToTransform = create(context, dmlType, transformation,
sourceKeyValues, oldSourceValues, sourceValues);
List<TransformedData> dataThatHasBeenTransformed = new ArrayList<TransformedData>(dataToTransform.size());
if (log.isDebugEnabled()) {
log.debug("TransformDataCreated", dataToTransform.size(),
transformation.getTransformId(),
transformation.getFullyQualifiedTargetTableName());
}
int transformNumber = 0;
for (TransformedData targetData : dataToTransform) {
transformNumber++;
if (perform(context, targetData, transformation, sourceValues, oldSourceValues)) {
if (log.isDebugEnabled()) {
log.debug("TransformedDataReadyForApplication", targetData
.getTargetDmlType().toString(), transformNumber,
ArrayUtils.toString(targetData
.getColumnNames()), ArrayUtils.toString(targetData
.getColumnValues()));
}
dataThatHasBeenTransformed.add(targetData);
} else {
log.debug("TransformNotPerformed", transformNumber);
}
}
return dataThatHasBeenTransformed;
} catch (IgnoreRowException ex) {
// ignore this row
if (log.isDebugEnabled()) {
log.debug("TransformRowIgnored",
"transformation aborted during tranformation of key");
}
return new ArrayList<TransformedData>(0);
}
}
protected boolean perform(ICacheContext context, TransformedData data,
TransformTable transformation, Map<String, String> sourceValues,
Map<String, String> oldSourceValues) throws IgnoreRowException {
boolean persistData = false;
try {
for (TransformColumn transformColumn : transformation.getTransformColumns()) {
if (transformColumn.getSourceColumnName() == null
|| sourceValues.containsKey(transformColumn.getSourceColumnName())) {
IColumnTransform<?> transform = transformService.getColumnTransforms().get(
transformColumn.getTransformType());
if (transform == null || transform instanceof ISingleValueColumnTransform) {
try {
String value = (String) transformColumn(context, data, transformColumn,
sourceValues, oldSourceValues);
data.put(transformColumn, value, false);
} catch (IgnoreColumnException e) {
// Do nothing. We are ignoring the column
}
}
} else {
log.warn("TransformSourceColumnNotFound",
transformColumn.getSourceColumnName(), transformation.getTransformId());
}
}
if (data.getTargetDmlType() != DmlType.DELETE) {
if (data.getTargetDmlType() == DmlType.INSERT && transformation.isUpdateFirst()) {
data.setTargetDmlType(DmlType.UPDATE);
}
persistData = true;
} else {
// handle the delete action
DeleteAction deleteAction = transformation.getDeleteAction();
switch (deleteAction) {
case DEL_ROW:
data.setTargetDmlType(DmlType.DELETE);
persistData = true;
break;
case UPDATE_COL:
data.setTargetDmlType(DmlType.UPDATE);
persistData = true;
break;
case NONE:
default:
if (log.isDebugEnabled()) {
log.debug("TransformNoActionNotConfiguredToDelete", transformation.getTransformId());
}
}
}
} catch (IgnoreRowException ex) {
// ignore this row
if (log.isDebugEnabled()) {
log.debug("TransformRowIgnored", ArrayUtils.toString(data.getKeyValues()));
}
}
return persistData;
}
protected List<TransformedData> create(ICacheContext context, DmlType dmlType,
TransformTable transformation, Map<String, String> sourceKeyValues,
Map<String, String> oldSourceValues, Map<String, String> sourceValues) throws IgnoreRowException {
List<TransformedData> datas = new ArrayList<TransformedData>();
datas.add(new TransformedData(transformation, dmlType, sourceKeyValues, oldSourceValues, sourceValues));
List<TransformColumn> columns = transformation.getPrimaryKeyColumns();
if (columns == null || columns.size() == 0) {
log.error("TransformNoPrimaryKeyDefined", transformation.getTransformId());
} else {
for (TransformColumn transformColumn : columns) {
List<TransformedData> newDatas = null;
for (TransformedData data : datas) {
try {
Object columnValue = transformColumn(context, data, transformColumn,
sourceKeyValues, oldSourceValues);
if (columnValue instanceof String) {
data.put(transformColumn, (String) columnValue, true);
} else if (columnValue instanceof List) {
@SuppressWarnings("unchecked")
List<String> values = (List<String>) columnValue;
if (values.size() > 0) {
data.put(transformColumn, values.get(0), true);
if (values.size() > 1) {
if (newDatas == null) {
newDatas = new ArrayList<TransformedData>(values.size() - 1);
}
for (int i = 1; i < values.size(); i++) {
TransformedData newData = data.copy();
newData.put(transformColumn, values.get(i), true);
newDatas.add(newData);
}
}
} else {
throw new IgnoreRowException();
}
}
} catch (IgnoreColumnException e) {
// Do nothing. We are suppose to ignore the column.
}
}
if (newDatas != null) {
datas.addAll(newDatas);
newDatas = null;
}
}
}
return datas;
}
protected Object transformColumn(ICacheContext context, TransformedData data,
TransformColumn transformColumn, Map<String, String> sourceValues,
Map<String, String> oldSourceValues) throws IgnoreRowException, IgnoreColumnException {
Object returnValue = null;
String value = transformColumn.getSourceColumnName() != null ? sourceValues
.get(transformColumn.getSourceColumnName()) : null;
returnValue = value;
IColumnTransform<?> transform = transformService.getColumnTransforms().get(
transformColumn.getTransformType());
if (transform != null) {
String oldValue = oldSourceValues.get(transformColumn.getSourceColumnName());
returnValue = transform.transform(context, transformColumn, data, sourceValues, value,
oldValue);
}
return returnValue;
}
protected String getFullyQualifiedTableName(String catalogName, String schemaName,
String tableName) {
if (!StringUtils.isBlank(schemaName)) {
tableName = schemaName + "." + tableName;
}
if (!StringUtils.isBlank(catalogName)) {
tableName = catalogName + "." + tableName;
}
return tableName;
}
abstract protected TransformPoint getTransformPoint();
protected List<TransformTable> findTablesToTransform(NodeGroupLink nodeGroupLink,
String fullyQualifiedSourceTableName) {
Map<String, List<TransformTable>> transformMap = transformService.findTransformsFor(
nodeGroupLink, getTransformPoint(), true);
List<TransformTable> transforms = transformMap != null ? transformMap
.get(fullyQualifiedSourceTableName) : null;
return transforms;
}
public void setTransformService(ITransformService transformService) {
this.transformService = transformService;
}
public void setDbDialect(IDbDialect dbDialect) {
this.dbDialect = dbDialect;
}
public void setParameterService(IParameterService parameterService) {
this.parameterService = parameterService;
}
public void setTablePrefix(String tablePrefix) {
this.tablePrefix = tablePrefix;
}
public boolean isAutoRegister() {
return true;
}
}