com.datastax.dse.driver.api.core.metadata.schema.DseGraphTableMetadata Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.datastax.dse.driver.api.core.metadata.schema;
import com.datastax.dse.driver.internal.core.metadata.schema.ScriptHelper;
import com.datastax.oss.driver.api.core.CqlIdentifier;
import com.datastax.oss.driver.api.core.metadata.schema.ClusteringOrder;
import com.datastax.oss.driver.api.core.metadata.schema.ColumnMetadata;
import com.datastax.oss.driver.api.core.metadata.schema.TableMetadata;
import com.datastax.oss.driver.internal.core.metadata.schema.ScriptBuilder;
import com.datastax.oss.driver.internal.core.metadata.schema.parsing.RelationParser;
import edu.umd.cs.findbugs.annotations.NonNull;
import java.util.Map;
import java.util.Optional;
/**
* Specialized table metadata, that handles the graph-specific properties introduced in DSE 6.8.
*
* This type only exists to avoid breaking binary compatibility. When the driver is connected to
* a DSE cluster, all the {@link TableMetadata} instances it returns can be safely downcast to this
* interface.
*/
public interface DseGraphTableMetadata extends DseTableMetadata {
/**
* The vertex metadata if this table represents a vertex in graph, otherwise empty.
*
*
This is mutually exclusive with {@link #getEdge()}.
*/
@NonNull
Optional getVertex();
/**
* The edge metadata if this table represents an edge in graph, otherwise empty.
*
* This is mutually exclusive with {@link #getVertex()}.
*/
@NonNull
Optional getEdge();
@NonNull
@Override
default String describe(boolean pretty) {
ScriptBuilder builder = new ScriptBuilder(pretty);
if (isVirtual()) {
builder.append("/* VIRTUAL ");
} else {
builder.append("CREATE ");
}
builder
.append("TABLE ")
.append(getKeyspace())
.append(".")
.append(getName())
.append(" (")
.newLine()
.increaseIndent();
for (ColumnMetadata column : getColumns().values()) {
builder.append(column.getName()).append(" ").append(column.getType().asCql(true, pretty));
if (column.isStatic()) {
builder.append(" static");
}
builder.append(",").newLine();
}
// PK
builder.append("PRIMARY KEY (");
if (getPartitionKey().size() == 1) { // PRIMARY KEY (k
builder.append(getPartitionKey().get(0).getName());
} else { // PRIMARY KEY ((k1, k2)
builder.append("(");
boolean first = true;
for (ColumnMetadata pkColumn : getPartitionKey()) {
if (first) {
first = false;
} else {
builder.append(", ");
}
builder.append(pkColumn.getName());
}
builder.append(")");
}
// PRIMARY KEY (, cc1, cc2, cc3)
for (ColumnMetadata clusteringColumn : getClusteringColumns().keySet()) {
builder.append(", ").append(clusteringColumn.getName());
}
builder.append(")");
builder.newLine().decreaseIndent().append(")");
builder.increaseIndent();
if (isCompactStorage()) {
builder.andWith().append("COMPACT STORAGE");
}
if (getClusteringColumns().containsValue(ClusteringOrder.DESC)) {
builder.andWith().append("CLUSTERING ORDER BY (");
boolean first = true;
for (Map.Entry entry :
getClusteringColumns().entrySet()) {
if (first) {
first = false;
} else {
builder.append(", ");
}
builder.append(entry.getKey().getName()).append(" ").append(entry.getValue().name());
}
builder.append(")");
}
getVertex()
.ifPresent(
vertex -> {
builder.andWith().append("VERTEX LABEL").append(" ").append(vertex.getLabelName());
});
getEdge()
.ifPresent(
edge -> {
builder.andWith().append("EDGE LABEL").append(" ").append(edge.getLabelName());
ScriptHelper.appendEdgeSide(
builder,
edge.getFromTable(),
edge.getFromLabel(),
edge.getFromPartitionKeyColumns(),
edge.getFromClusteringColumns(),
"FROM");
ScriptHelper.appendEdgeSide(
builder,
edge.getToTable(),
edge.getToLabel(),
edge.getToPartitionKeyColumns(),
edge.getToClusteringColumns(),
"TO");
});
Map options = getOptions();
RelationParser.appendOptions(options, builder);
builder.append(";");
if (isVirtual()) {
builder.append(" */");
}
return builder.build();
}
}