Package com.datastax.driver.core

Class AbstractTableMetadata

java.lang.Object

com.datastax.driver.core.AbstractTableMetadata

Direct Known Subclasses:

MaterializedViewMetadata, TableMetadata

public abstract class AbstractTableMetadata
extends Object

Base class for Tables and Materialized Views metadata.

Field Summary

Fields

Modifier and Type	Field	Description
protected VersionNumber	cassandraVersion
protected List<ColumnMetadata>	clusteringColumns
protected List<ClusteringOrder>	clusteringOrder
protected Map<String,ColumnMetadata>	columns
protected UUID	id
protected KeyspaceMetadata	keyspace
protected String	name
protected TableOptionsMetadata	options
protected List<ColumnMetadata>	partitionKey

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractTableMetadata(KeyspaceMetadata keyspace, String name, UUID id, List<ColumnMetadata> partitionKey, List<ColumnMetadata> clusteringColumns, Map<String,ColumnMetadata> columns, TableOptionsMetadata options, List<ClusteringOrder> clusteringOrder, VersionNumber cassandraVersion)

Method Summary

Modifier and Type	Method	Description
protected StringBuilder	appendOptions(StringBuilder sb, boolean formatted)
String	asCQLQuery()	Returns a CQL query representing this table.
protected abstract String	asCQLQuery(boolean formatted)
String	exportAsString()	Returns a String containing CQL queries representing this table and the index on it.
List<ColumnMetadata>	getClusteringColumns()	Returns the list of clustering columns for this table.
List<ClusteringOrder>	getClusteringOrder()	Returns the clustering order for this table.
ColumnMetadata	getColumn(String name)	Returns metadata on a column of this table.
List<ColumnMetadata>	getColumns()	Returns a list containing all the columns of this table.
UUID	getId()	Returns the unique id of this table.
KeyspaceMetadata	getKeyspace()	Returns the keyspace this table belong to.
String	getName()	Returns the name of this table.
TableOptionsMetadata	getOptions()	Returns the options for this table.
List<ColumnMetadata>	getPartitionKey()	Returns the list of columns composing the partition key for this table.
List<ColumnMetadata>	getPrimaryKey()	Returns the list of columns composing the primary key for this table.
boolean	isVirtual()	Returns whether or not this table is a virtual table
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

keyspace

protected final KeyspaceMetadata keyspace

name

protected final String name

id

protected final UUID id

partitionKey

protected final List<ColumnMetadata> partitionKey

clusteringColumns

protected final List<ColumnMetadata> clusteringColumns

columns

protected final Map<String,ColumnMetadata> columns

options

protected final TableOptionsMetadata options

clusteringOrder

protected final List<ClusteringOrder> clusteringOrder

cassandraVersion

protected final VersionNumber cassandraVersion

Constructor Detail

AbstractTableMetadata

protected AbstractTableMetadata(KeyspaceMetadata keyspace,
                                String name,
                                UUID id,
                                List<ColumnMetadata> partitionKey,
                                List<ColumnMetadata> clusteringColumns,
                                Map<String,ColumnMetadata> columns,
                                TableOptionsMetadata options,
                                List<ClusteringOrder> clusteringOrder,
                                VersionNumber cassandraVersion)

Method Detail

getName

public String getName()

Returns the name of this table.

Returns:

the name of this CQL table.

getId

public UUID getId()

Returns the unique id of this table.

Note: this id is available in Cassandra 2.1 and above. It will be null for earlier versions.

Returns:

the unique id of the table.

getKeyspace

public KeyspaceMetadata getKeyspace()

Returns the keyspace this table belong to.

Returns:

the keyspace metadata of the keyspace this table belong to.

getColumn

public ColumnMetadata getColumn(String name)

Returns metadata on a column of this table.

Parameters:

name - the name of the column to retrieve (name will be interpreted as a case-insensitive identifier unless enclosed in double-quotes, see Metadata.quote(java.lang.String)).

Returns:

the metadata for the column if it exists, or null otherwise.

getColumns

public List<ColumnMetadata> getColumns()

Returns a list containing all the columns of this table.

The order of the columns in the list is consistent with the order of the columns returned by a SELECT * FROM thisTable: the first column is the partition key, next are the clustering columns in their defined order, and then the rest of the columns follow in alphabetic order.

Returns:

a list containing the metadata for the columns of this table.

getPrimaryKey

public List<ColumnMetadata> getPrimaryKey()

Returns the list of columns composing the primary key for this table.

A table will always at least have a partition key (that may itself be one or more columns), so the returned list at least has one element.

Returns:

the list of columns composing the primary key for this table.

getPartitionKey

public List<ColumnMetadata> getPartitionKey()

Returns the list of columns composing the partition key for this table.

A table always has a partition key so the returned list has at least one element.

Returns:

the list of columns composing the partition key for this table.

getClusteringColumns

public List<ColumnMetadata> getClusteringColumns()

Returns the list of clustering columns for this table.

Returns:

the list of clustering columns for this table. If there is no clustering columns, an empty list is returned.

getClusteringOrder

public List<ClusteringOrder> getClusteringOrder()

Returns the clustering order for this table.

The returned contains the clustering order of each clustering column. The ith element of the result correspond to the order (ascending or descending) of the ith clustering column (see getClusteringColumns()). Note that a table defined without any particular clustering order is equivalent to one for which all the clustering keys are in ascending order.

Returns:

a list with the clustering order for each clustering column.

getOptions

public TableOptionsMetadata getOptions()

Returns the options for this table.

This value will be null for virtual tables.

Returns:

the options for this table.

isVirtual

public boolean isVirtual()

Returns whether or not this table is a virtual table

Returns:

true if virtual keyspace, false otherwise.

exportAsString

public String exportAsString()

Returns a String containing CQL queries representing this table and the index on it.

In other words, this method returns the queries that would allow you to recreate the schema of this table, along with the indexes and views defined on this table, if any.

Note that the returned String is formatted to be human readable (for some definition of human readable at least).

Returns:

the CQL queries representing this table schema as a {code String}.

asCQLQuery

public String asCQLQuery()

Returns a CQL query representing this table.

This method returns a single 'CREATE TABLE' query with the options corresponding to this table definition.

Note that the returned string is a single line; the returned query is not formatted in any way.

Returns:

the 'CREATE TABLE' query corresponding to this table.

See Also:

exportAsString()

asCQLQuery

protected abstract String asCQLQuery(boolean formatted)

appendOptions

protected StringBuilder appendOptions(StringBuilder sb,
                                      boolean formatted)

toString

public String toString()

Overrides:

toString in class Object