Package com.mckoi.database.interpret
Class FromTableSubQuerySource
- java.lang.Object
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- com.mckoi.database.interpret.FromTableSubQuerySource
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- All Implemented Interfaces:
FromTableInterface
public class FromTableSubQuerySource extends java.lang.Object implements FromTableInterface
An implementation of FromTableInterface that wraps around a TableSelectExpression object as a sub-query source.
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Field Summary
Fields Modifier and Type Field Description private boolean
case_insensitive
Set to true if this should do case insensitive resolutions.private TableName
end_table_name
The TableName that this source is generated to (aliased name).private TableExpressionFromSet
from_set
The fully prepared TableExpressionFromSet object that is used to qualify variables in the table.private TableSelectExpression
table_expression
The wrapped object.private java.lang.String
unique_key
A unique name given to this source that is used to reference it in a TableSet.private Variable[]
vars
The list of all variable names in the resultant source.
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Constructor Summary
Constructors Constructor Description FromTableSubQuerySource(DatabaseConnection connection, java.lang.String unique_key, TableSelectExpression table_expression, TableExpressionFromSet from_set, TableName aliased_table_name)
Constructs the source.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Variable[]
allColumns()
Returns an array of Variable objects that references each column available in this table set item in order from left column to right column.private void
ensureVarList()
Makes sure the 'vars' list is created correctly.(package private) TableName
getAliasedName()
Returns the aliased table name of this sub-query or null if it is left as-is.(package private) TableExpressionFromSet
getFromSet()
Returns the TableExpressionFromSet for this sub-query.(package private) TableSelectExpression
getTableExpression()
Returns the TableSelectExpression for this sub-query.java.lang.String
getUniqueKey()
Returns the unique name of this source.java.lang.String
getUniqueName()
Returns a unique name given to this table source.boolean
matchesReference(java.lang.String catalog, java.lang.String schema, java.lang.String table)
Returns true if this source will match the given catalog, schema and table.private boolean
matchesVar(Variable v, java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)
If the given Variable matches the reference then this method returns true.Variable
resolveColumn(java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)
Returns a Variable that is a fully resolved form of the given column in this table set.int
resolveColumnCount(java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)
Returns the number of instances we can resolve the given catalog, schema, table and column name to a column or columns within this item.void
setCaseInsensitive(boolean status)
Toggle the case sensitivity flag.private boolean
stringCompare(java.lang.String str1, java.lang.String str2)
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Field Detail
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table_expression
private TableSelectExpression table_expression
The wrapped object.
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from_set
private TableExpressionFromSet from_set
The fully prepared TableExpressionFromSet object that is used to qualify variables in the table.
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end_table_name
private TableName end_table_name
The TableName that this source is generated to (aliased name). If null, we inherit from the root set.
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unique_key
private java.lang.String unique_key
A unique name given to this source that is used to reference it in a TableSet.
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vars
private Variable[] vars
The list of all variable names in the resultant source.
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case_insensitive
private boolean case_insensitive
Set to true if this should do case insensitive resolutions.
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Constructor Detail
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FromTableSubQuerySource
public FromTableSubQuerySource(DatabaseConnection connection, java.lang.String unique_key, TableSelectExpression table_expression, TableExpressionFromSet from_set, TableName aliased_table_name)
Constructs the source.
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Method Detail
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getTableExpression
TableSelectExpression getTableExpression()
Returns the TableSelectExpression for this sub-query.
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getFromSet
TableExpressionFromSet getFromSet()
Returns the TableExpressionFromSet for this sub-query.
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getAliasedName
TableName getAliasedName()
Returns the aliased table name of this sub-query or null if it is left as-is.
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ensureVarList
private void ensureVarList()
Makes sure the 'vars' list is created correctly.
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getUniqueKey
public java.lang.String getUniqueKey()
Returns the unique name of this source.
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setCaseInsensitive
public void setCaseInsensitive(boolean status)
Toggle the case sensitivity flag.
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stringCompare
private boolean stringCompare(java.lang.String str1, java.lang.String str2)
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matchesVar
private boolean matchesVar(Variable v, java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)
If the given Variable matches the reference then this method returns true.
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getUniqueName
public java.lang.String getUniqueName()
Description copied from interface:FromTableInterface
Returns a unique name given to this table source. No other sources will share this identifier string.- Specified by:
getUniqueName
in interfaceFromTableInterface
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matchesReference
public boolean matchesReference(java.lang.String catalog, java.lang.String schema, java.lang.String table)
Description copied from interface:FromTableInterface
Returns true if this source will match the given catalog, schema and table. If any arguments are null then it is not included in the match.Used for 'Part.*' type glob searches.
- Specified by:
matchesReference
in interfaceFromTableInterface
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resolveColumnCount
public int resolveColumnCount(java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)
Description copied from interface:FromTableInterface
Returns the number of instances we can resolve the given catalog, schema, table and column name to a column or columns within this item. Note that if catalog, schema, table or column is 'null' then it means it doesn't matter.For example, say we need to resolve the column 'id' the arguments are null, null, null, "id". This may resolve to multiple columns if there is a mixture of tables with "id" as a column.
Note that parameters of 'null, null, null, null', 'null, null, null, not null', 'null, null, not null, not null', 'null, not null, not null, not null', and 'not null, not null, not null, not null' are only accepted.
- Specified by:
resolveColumnCount
in interfaceFromTableInterface
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resolveColumn
public Variable resolveColumn(java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)
Description copied from interface:FromTableInterface
Returns a Variable that is a fully resolved form of the given column in this table set. This method does not have to check whether the parameters reference more than one column. If more than one column is referenced, the actual column returned is implementation specific.- Specified by:
resolveColumn
in interfaceFromTableInterface
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allColumns
public Variable[] allColumns()
Description copied from interface:FromTableInterface
Returns an array of Variable objects that references each column available in this table set item in order from left column to right column.- Specified by:
allColumns
in interfaceFromTableInterface
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