Package org.apache.calcite.adapter.file

Class FileSchema

java.lang.Object

org.apache.calcite.schema.impl.AbstractSchema

org.apache.calcite.adapter.file.FileSchema

All Implemented Interfaces:

Schema

class FileSchema
extends AbstractSchema

Schema mapped onto a set of URLs / HTML tables. Each table in the schema is an HTML table on a URL.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.schema.impl.AbstractSchema

AbstractSchema.Factory

Nested classes/interfaces inherited from interface org.apache.calcite.schema.Schema

Schema.TableType

Field Summary

Fields

Modifier and Type	Field	Description
private java.io.File	baseDirectory
private com.google.common.collect.ImmutableList<java.util.Map<java.lang.String,java.lang.Object>>	tables

Constructor Summary

Constructors

Constructor	Description
FileSchema(SchemaPlus parentSchema, java.lang.String name, java.io.File baseDirectory, java.util.List<java.util.Map<java.lang.String,java.lang.Object>> tables)	Creates an HTML tables schema.

Method Summary

Modifier and Type	Method	Description
private boolean	addTable(com.google.common.collect.ImmutableMap.Builder<java.lang.String,Table> builder, java.util.Map<java.lang.String,java.lang.Object> tableDef)
private boolean	addTable(com.google.common.collect.ImmutableMap.Builder<java.lang.String,Table> builder, Source source, java.lang.String tableName, java.util.Map<java.lang.String,java.lang.Object> tableDef)
protected java.util.Map<java.lang.String,Table>	getTableMap()	Returns a map of tables in this schema by name.
private static java.lang.String	trim(java.lang.String s, java.lang.String suffix)	Looks for a suffix on a string and returns either the string with the suffix removed or the original string.
private static java.lang.String	trimOrNull(java.lang.String s, java.lang.String suffix)	Looks for a suffix on a string and returns either the string with the suffix removed or null.

Methods inherited from class org.apache.calcite.schema.impl.AbstractSchema

getExpression, getFunctionMultimap, getFunctionNames, getFunctions, getSubSchema, getSubSchemaMap, getSubSchemaNames, getTable, getTableNames, getType, getTypeMap, getTypeNames, isMutable, snapshot

Methods inherited from class java.lang.Object

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

Field Detail

tables

private final com.google.common.collect.ImmutableList<java.util.Map<java.lang.String,java.lang.Object>> tables

baseDirectory

private final java.io.File baseDirectory

Constructor Detail

FileSchema

FileSchema(SchemaPlus parentSchema,
           java.lang.String name,
           java.io.File baseDirectory,
           java.util.List<java.util.Map<java.lang.String,java.lang.Object>> tables)

Creates an HTML tables schema.

Parameters:

parentSchema - Parent schema

name - Schema name

baseDirectory - Base directory to look for relative files, or null

tables - List containing HTML table identifiers

Method Detail

trim

private static java.lang.String trim(java.lang.String s,
                                     java.lang.String suffix)

Looks for a suffix on a string and returns either the string with the suffix removed or the original string.

trimOrNull

private static java.lang.String trimOrNull(java.lang.String s,
                                           java.lang.String suffix)

Looks for a suffix on a string and returns either the string with the suffix removed or null.

getTableMap

protected java.util.Map<java.lang.String,Table> getTableMap()

Description copied from class: AbstractSchema

Returns a map of tables in this schema by name.

The implementations of AbstractSchema.getTableNames() and AbstractSchema.getTable(String) depend on this map. The default implementation of this method returns the empty map. Override this method to change their behavior.

Overrides:

getTableMap in class AbstractSchema

Returns:

Map of tables in this schema by name

addTable

private boolean addTable(com.google.common.collect.ImmutableMap.Builder<java.lang.String,Table> builder,
                         java.util.Map<java.lang.String,java.lang.Object> tableDef)
                  throws java.net.MalformedURLException

Throws:

java.net.MalformedURLException

addTable

private boolean addTable(com.google.common.collect.ImmutableMap.Builder<java.lang.String,Table> builder,
                         Source source,
                         java.lang.String tableName,
                         java.util.Map<java.lang.String,java.lang.Object> tableDef)