All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.datastax.oss.driver.api.core.cql.Row Maven / Gradle / Ivy

The newest version!
/*
 * 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.oss.driver.api.core.cql;

import com.datastax.oss.driver.api.core.data.GettableById;
import com.datastax.oss.driver.api.core.data.GettableByIndex;
import com.datastax.oss.driver.api.core.data.GettableByName;
import com.datastax.oss.driver.api.core.detach.Detachable;
import com.datastax.oss.driver.api.core.type.codec.TypeCodec;
import edu.umd.cs.findbugs.annotations.NonNull;

/**
 * A row from a CQL table.
 *
 * 

The default implementation returned by the driver is immutable and serializable. If you write * your own implementation, it should at least be thread-safe; serializability is not mandatory, but * recommended for use with some 3rd-party tools like Apache Spark ™. */ public interface Row extends GettableByIndex, GettableByName, GettableById, Detachable { /** @return the column definitions contained in this result set. */ @NonNull ColumnDefinitions getColumnDefinitions(); /** * Returns a string representation of the contents of this row. * *

This produces a comma-separated list enclosed in square brackets. Each column is represented * by its name, followed by a column and the value as a CQL literal. For example: * *

   * [id:1, name:'test']
   * 
* * Notes: * *
    *
  • This method does not sanitize its output in any way. In particular, no effort is made to * limit output size: all columns are included, and large strings or blobs will be appended * as-is. *
  • Be mindful of how you expose the result. For example, in high-security environments, it * might be undesirable to leak data in application logs. *
*/ @NonNull default String getFormattedContents() { StringBuilder result = new StringBuilder("["); ColumnDefinitions definitions = getColumnDefinitions(); for (int i = 0; i < definitions.size(); i++) { if (i > 0) { result.append(", "); } ColumnDefinition definition = definitions.get(i); String name = definition.getName().asCql(true); TypeCodec codec = codecRegistry().codecFor(definition.getType()); Object value = codec.decode(getBytesUnsafe(i), protocolVersion()); result.append(name).append(':').append(codec.format(value)); } return result.append("]").toString(); } /** * Returns an abstract representation of this object, that may not include the row's * contents. * *

The driver's built-in {@link Row} implementation returns the default format of {@link * Object#toString()}: the class name, followed by the at-sign and the hash code of the object. * *

Omitting the contents was a deliberate choice, because we feel it would make it too easy to * accidentally leak data (e.g. in application logs). If you want the contents, use {@link * #getFormattedContents()}. */ @Override String toString(); }