/
CassandraPlatform.java
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/
CassandraPlatform.java
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package org.jumpmind.db.platform.cassandra;
import java.sql.Types;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.jumpmind.db.model.Column;
import org.jumpmind.db.model.Table;
import org.jumpmind.db.platform.AbstractDatabasePlatform;
import org.jumpmind.db.platform.IDdlBuilder;
import org.jumpmind.db.platform.IDdlReader;
import org.jumpmind.db.sql.ISqlTemplate;
import org.jumpmind.db.sql.SqlTemplateSettings;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.ColumnMetadata;
import com.datastax.driver.core.DataType;
import com.datastax.driver.core.KeyspaceMetadata;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.TableMetadata;
public class CassandraPlatform extends AbstractDatabasePlatform {
Map<String, Map<String, Table>> metaData = new HashMap<String, Map<String, Table>>();
protected Session session;
protected Cluster cluster;
public CassandraPlatform(SqlTemplateSettings settings, String contactPoint) {
super(settings);
cluster = Cluster.builder().addContactPoint(contactPoint).build();
this.session = cluster.connect();
buildMetaData();
}
@Override
public String getName() {
return "cassandra";
}
@Override
public String getDefaultSchema() {
return null;
}
@Override
public String getDefaultCatalog() {
return null;
}
@Override
public <T> T getDataSource() {
return null;
}
@Override
public boolean isLob(int type) {
return false;
}
@Override
public IDdlBuilder getDdlBuilder() {
return new CassandraDdlBuilder();
}
@Override
public IDdlReader getDdlReader() {
return new CassandraDdlReader(this);
}
@Override
public ISqlTemplate getSqlTemplate() {
return new CassandraSqlTemplate();
}
@Override
public ISqlTemplate getSqlTemplateDirty() {
return new CassandraSqlTemplate();
}
public Session getSession() {
return session;
}
public void setSession(Session session) {
this.session = session;
}
public Map<String, Map<String, Table>> getMetaData() {
return metaData;
}
public void setMetaData(Map<String, Map<String, Table>> metaData) {
this.metaData = metaData;
}
protected void buildMetaData() {
for (KeyspaceMetadata keystoreMeta : cluster.getMetadata().getKeyspaces()) {
metaData.put(keystoreMeta.getName(), new HashMap<String, Table>());
for (TableMetadata tableMeta : keystoreMeta.getTables()) {
Table table = new Table();
table.setName(tableMeta.getName());
table.setSchema(keystoreMeta.getName());
List<ColumnMetadata> pkColumns = tableMeta.getPrimaryKey();
for (ColumnMetadata columnMeta : tableMeta.getColumns()) {
Column column = new Column();
column.setName(columnMeta.getName());
column.setMappedTypeCode(getMappedTypeCode(columnMeta.getType().getName().name()));
if (columnMeta.getType().getTypeArguments() != null) {
StringBuffer types = new StringBuffer();
for (DataType dt : columnMeta.getType().getTypeArguments()) {
if (types.length() > 0) {
types.append(",");
}
types.append(dt.getName().name());
column.setDescription(types.toString());
}
}
for (ColumnMetadata pkMeta : pkColumns) {
if (pkMeta.equals(columnMeta)) {
column.setPrimaryKey(true);
}
}
table.addColumn(column);
}
metaData.get(keystoreMeta.getName()).put(table.getName(), table);
}
}
}
protected int getMappedTypeCode(String dataType) {
/*
* Unsupported Types ================= ASCII(1), BLOB(3), COUNTER(5), INET(16),
* VARINT(14), TIMEUUID(15), CUSTOM(0), UDT(48,
* ProtocolVersion.V3), TUPLE(49, ProtocolVersion.V3),
*/
if (dataType == DataType.Name.INT.name()) {
return Types.INTEGER;
} else if (dataType == DataType.Name.BIGINT.name()) {
return Types.BIGINT;
} else if (dataType == DataType.Name.SMALLINT.name()) {
return Types.SMALLINT;
} else if (dataType == DataType.Name.TINYINT.name()) {
return Types.TINYINT;
} else if (dataType == DataType.Name.BOOLEAN.name()) {
return Types.BOOLEAN;
} else if (dataType == DataType.Name.DECIMAL.name()) {
return Types.DECIMAL;
} else if (dataType == DataType.Name.DOUBLE.name()) {
return Types.DOUBLE;
} else if (dataType == DataType.Name.FLOAT.name()) {
return Types.FLOAT;
} else if (dataType == DataType.Name.TIMESTAMP.name()) {
return Types.TIMESTAMP;
} else if (dataType == DataType.Name.DATE.name()) {
return Types.DATE;
} else if (dataType == DataType.Name.TIME.name()) {
return Types.TIME;
} else if (dataType == DataType.Name.VARCHAR.name() || dataType == DataType.Name.TEXT.name()
|| dataType == DataType.Name.UUID.name()) {
return Types.VARCHAR;
} else if (dataType == DataType.Name.LIST.name()) {
return Types.STRUCT;
} else if (dataType == DataType.Name.SET.name()) {
return Types.REF;
} else if (dataType == DataType.Name.MAP.name()) {
return Types.OTHER;
}
return Types.VARCHAR;
}
}