/*
* Licensed 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.facebook.presto.metadata;
import com.facebook.presto.Session;
import com.facebook.presto.connector.ConnectorId;
import com.facebook.presto.spi.ErrorCodeSupplier;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.session.PropertyMetadata;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.sql.analyzer.SemanticException;
import com.facebook.presto.sql.planner.ParameterRewriter;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.ExpressionTreeRewriter;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import static com.facebook.presto.spi.StandardErrorCode.NOT_FOUND;
import static com.facebook.presto.spi.type.TypeUtils.writeNativeValue;
import static com.facebook.presto.sql.planner.ExpressionInterpreter.evaluateConstantExpression;
import static com.google.common.base.Preconditions.checkState;
import static java.lang.String.format;
import static java.util.Locale.ENGLISH;
import static java.util.Objects.requireNonNull;
abstract class AbstractPropertyManager
{
private final ConcurrentMap<ConnectorId, Map<String, PropertyMetadata<?>>> connectorProperties = new ConcurrentHashMap<>();
private final String propertyType;
private final ErrorCodeSupplier propertyError;
protected AbstractPropertyManager(String propertyType, ErrorCodeSupplier propertyError)
{
requireNonNull(propertyType, "propertyType is null");
this.propertyType = propertyType;
this.propertyError = requireNonNull(propertyError, "propertyError is null");
}
public final void addProperties(ConnectorId connectorId, List<PropertyMetadata<?>> properties)
{
requireNonNull(connectorId, "connectorId is null");
requireNonNull(properties, "properties is null");
Map<String, PropertyMetadata<?>> propertiesByName = Maps.uniqueIndex(properties, PropertyMetadata::getName);
checkState(connectorProperties.putIfAbsent(connectorId, propertiesByName) == null, "Properties for connector '%s' are already registered", connectorId);
}
public final void removeProperties(ConnectorId connectorId)
{
connectorProperties.remove(connectorId);
}
public final Map<String, Object> getProperties(
ConnectorId connectorId,
String catalog, // only use this for error messages
Map<String, Expression> sqlPropertyValues,
Session session,
Metadata metadata,
List<Expression> parameters)
{
Map<String, PropertyMetadata<?>> supportedProperties = connectorProperties.get(connectorId);
if (supportedProperties == null) {
throw new PrestoException(NOT_FOUND, "Catalog not found: " + catalog);
}
ImmutableMap.Builder<String, Object> properties = ImmutableMap.builder();
// Fill in user-specified properties
for (Map.Entry<String, Expression> sqlProperty : sqlPropertyValues.entrySet()) {
String propertyName = sqlProperty.getKey().toLowerCase(ENGLISH);
PropertyMetadata<?> property = supportedProperties.get(propertyName);
if (property == null) {
throw new PrestoException(propertyError,
format("Catalog '%s' does not support %s property '%s'",
catalog,
propertyType,
propertyName));
}
Object sqlObjectValue;
try {
sqlObjectValue = evaluatePropertyValue(sqlProperty.getValue(), property.getSqlType(), session, metadata, parameters);
}
catch (SemanticException e) {
throw new PrestoException(propertyError,
format("Invalid value for %s property '%s': Cannot convert '%s' to %s",
propertyType,
property.getName(),
sqlProperty.getValue(),
property.getSqlType()), e);
}
Object value;
try {
value = property.decode(sqlObjectValue);
}
catch (Exception e) {
throw new PrestoException(propertyError,
format("Unable to set %s property '%s' to '%s': %s",
propertyType,
property.getName(),
sqlProperty.getValue(),
e.getMessage()), e);
}
properties.put(property.getName(), value);
}
Map<String, Object> userSpecifiedProperties = properties.build();
// Fill in the remaining properties with non-null defaults
for (PropertyMetadata<?> propertyMetadata : supportedProperties.values()) {
if (!userSpecifiedProperties.containsKey(propertyMetadata.getName())) {
Object value = propertyMetadata.getDefaultValue();
if (value != null) {
properties.put(propertyMetadata.getName(), value);
}
}
}
return properties.build();
}
public Map<ConnectorId, Map<String, PropertyMetadata<?>>> getAllProperties()
{
return ImmutableMap.copyOf(connectorProperties);
}
private Object evaluatePropertyValue(Expression expression, Type expectedType, Session session, Metadata metadata, List<Expression> parameters)
{
Expression rewritten = ExpressionTreeRewriter.rewriteWith(new ParameterRewriter(parameters), expression);
Object value = evaluateConstantExpression(rewritten, expectedType, metadata, session, parameters);
// convert to object value type of SQL type
BlockBuilder blockBuilder = expectedType.createBlockBuilder(new BlockBuilderStatus(), 1);
writeNativeValue(expectedType, blockBuilder, value);
Object objectValue = expectedType.getObjectValue(session.toConnectorSession(), blockBuilder, 0);
if (objectValue == null) {
throw new PrestoException(propertyError, format("Invalid null value for %s property", propertyType));
}
return objectValue;
}
}