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## org.modeshape.graph.query.process
Class QueryResultColumns

    java.lang.Object
      org.modeshape.graph.query.process.QueryResultColumns

All Implemented Interfaces:
  Serializable, Iterable<Column>, QueryResults.Columns

Direct Known Subclasses:
  FullTextSearchResultColumns

    @Immutable
    public class QueryResultColumns

extends Object
implements QueryResults.Columns

Defines the columns associated with the results of a query. This definition allows the values to be accessed

See Also:
  Serialized Form

Field Summary
`protected static String` | `DEFAULT_SELECTOR_NAME`
`protected static QueryResultColumns` | `EMPTY`
`protected static List<Column>` | `NO_COLUMNS`
`protected static List<String>` | `NO_TYPES`

Constructor Summary
`protected` | `QueryResultColumns(boolean includeFullTextSearchScores, List<? extends Column> columns, List<String> columnTypes)` Create a new definition for the query results given the supplied columns.
`` | `QueryResultColumns(List<? extends Column> columns, List<String> columnTypes, boolean includeFullTextSearchScores)` Create a new definition for the query results given the supplied columns.

Method Summary
`protected Integer` | `columnIndexForName(String columnName)`
`protected static String` | `columnNameFor(Column column, List<String> columnNames, Set<Column> columnsWithDuplicateNames)`
`static QueryResultColumns` | `empty()` Get an empty results column definition.
`boolean` | `equals(Object obj)`
`protected static Set<Column>` | `findColumnsWithSameNames(List<Column> columns)`
`int` | `getColumnCount()` Get the number of columns in each tuple.
`int` | `getColumnIndexForName(String columnName)` Get the index of the column given the column name.
`int` | `getColumnIndexForProperty(String selectorName, String propertyName)` Get the index of the column given the name of the selector and the property name from where the column should be obtained.
`List<String>` | `getColumnNames()` Get the names of the columns.
`List<? extends Column>` | `getColumns()` Get the columns.
`List<String>` | `getColumnTypes()` Get the `type name` for each column.
`int` | `getFullTextSearchScoreIndexFor(String selectorName)` Get the index of the tuple value containing the full-text search score for the node taken from the named selector.
`int` | `getLocationCount()` Get the number of `Location` objects in each tuple.
`int` | `getLocationIndex(String selectorName)` Get the index of a tuple's correct Location object given the name of the selector used in the query.
`int` | `getLocationIndexForColumn(int columnIndex)` Get the index of a tuple's correct Location object given the column index.
`int` | `getLocationIndexForColumn(String columnName)` Get the index of a tuple's correct Location object given the column index.
`String` | `getPropertyNameForColumn(int columnIndex)` Get the name of the property that corresponds to the supplied column in each tuple.
`String` | `getSelectorNameForColumnName(String columnName)` Get the name of the selector that produced the column with the given name.
`List<String>` | `getSelectorNames()` Get the names of the selectors that are associated with these results.
`int` | `getTupleSize()` Get the size of the tuple arrays.
`List<String>` | `getTupleValueNames()` Get the names of the all of the tuple values.
`boolean` | `hasFullTextSearchScores()` Determine whether these results include full-text search scores.
`boolean` | `hasSelector(String selectorName)` Determine if these results contain values from the selector with the supplied name.
`static boolean` | `includeFullTextScores(Constraint constraint)`
`static boolean` | `includeFullTextScores(Iterable<Constraint> constraints)`
`boolean` | `includes(QueryResults.Columns other)` Determine whether this mapping includes all of the columns (and locations) in the supplied mapping.
`boolean` | `isUnionCompatible(QueryResults.Columns other)` Determine whether this column and the other are union-compatible (that is, having the same columns).
`Iterator<Column>` | `iterator()`
`QueryResults.Columns` | `joinWith(QueryResults.Columns rightColumns)` Obtain a new definition for the query results that is a combination of the these columns and the supplied columns, where the columns from this object appear first, followed by columns from the supplied set.
`QueryResults.Columns` | `subSelect(Column... columns)` Obtain a new definition for the query results that can be used to reference the same tuples that use this columns definition, but that defines a subset of the columns in this definition.
`QueryResults.Columns` | `subSelect(List<Column> columns)` Obtain a new definition for the query results that can be used to reference the same tuples that use this columns definition, but that defines a subset of the columns in this definition.
`String` | `toString()`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### NO_COLUMNS

    protected static final List<Column> NO_COLUMNS

### NO_TYPES

    protected static final List<String> NO_TYPES

### EMPTY

    protected static final QueryResultColumns EMPTY

### DEFAULT_SELECTOR_NAME

    protected static final String DEFAULT_SELECTOR_NAME

See Also:
  Constant Field Values

Constructor Detail

### QueryResultColumns

    public QueryResultColumns(List<? extends Column> columns,
                              List<String> columnTypes,
                              boolean includeFullTextSearchScores)

  Create a new definition for the query results given the supplied columns.

  Parameters:
    `columns` - the columns that define the results; should never be modified directly
    `columnTypes` - the names of the types for each column in `columns`
    `includeFullTextSearchScores` - true if room should be made in the tuples for the full-text search scores for each `Location`, or false otherwise

### QueryResultColumns

    protected QueryResultColumns(boolean includeFullTextSearchScores,
                                 List<? extends Column> columns,
                                 List<String> columnTypes)

  Create a new definition for the query results given the supplied columns.

  Parameters:
    `includeFullTextSearchScores` - true if room should be made in the tuples for the full-text search scores for each `Location`, or false otherwise
    `columns` - the columns that define the results; should never be modified directly
    `columnTypes` - the names of the types for each column in `columns`

Method Detail

### empty

    public static QueryResultColumns empty()

  Get an empty results column definition.

  Returns:
    the empty columns definition; never null

### includeFullTextScores

    public static boolean includeFullTextScores(Iterable<Constraint> constraints)

### includeFullTextScores

    public static boolean includeFullTextScores(Constraint constraint)

### subSelect

    public QueryResults.Columns subSelect(List<Column> columns)

  Obtain a new definition for the query results that can be used to reference the same tuples that use this columns definition, but that defines a subset of the columns in this definition. This is useful in a PROJECT operation, since that reduces the number of columns.

  Specified by:
    `subSelect` in interface `QueryResults.Columns`
  Parameters:
    `columns` - the new columns, which must be a subset of the columns in this definition; may not be null
  Returns:
    the new columns definition; never null
  See Also:
    `QueryResults.Columns.subSelect(java.util.List)`

### subSelect

    public QueryResults.Columns subSelect(Column... columns)

  Obtain a new definition for the query results that can be used to reference the same tuples that use this columns definition, but that defines a subset of the columns in this definition. This is useful in a PROJECT operation, since that reduces the number of columns.

  Specified by:
    `subSelect` in interface `QueryResults.Columns`
  Parameters:
    `columns` - the new columns, which must be a subset of the columns in this definition; may not be null
  Returns:
    the new columns definition; never null
  See Also:
    `QueryResults.Columns.subSelect(org.modeshape.graph.query.model.Column[])`

### joinWith

    public QueryResults.Columns joinWith(QueryResults.Columns rightColumns)

  Obtain a new definition for the query results that is a combination of the these columns and the supplied columns, where the columns from this object appear first, followed by columns from the supplied set. This is useful in a JOIN operation.

  Specified by:
    `joinWith` in interface `QueryResults.Columns`
  Parameters:
    `rightColumns` - the new columns, which must be a subset of the columns in this definition; may not be null
  Returns:
    the new columns definition; never null
  See Also:
    `QueryResults.Columns.joinWith(org.modeshape.graph.query.QueryResults.Columns)`

### getColumns

    public List<? extends Column> getColumns()

  Get the columns.

  Specified by:
    `getColumns` in interface `QueryResults.Columns`
  Returns:
    the immutable list of columns, with size equal to `QueryResults.Columns.getColumnCount()`; never null
  See Also:
    `QueryResults.Columns.getColumns()`

### iterator

    public Iterator<Column> iterator()

  Specified by:
    `iterator` in interface `Iterable<Column>`
  See Also:
    `Iterable.iterator()`

### getColumnNames

    public List<String> getColumnNames()

  Get the names of the columns.

  Specified by:
    `getColumnNames` in interface `QueryResults.Columns`
  Returns:
    the immutable list of column names, with size equal to `QueryResults.Columns.getColumnCount()`; never null
  See Also:
    `QueryResults.Columns.getColumnNames()`

### getColumnTypes

    public List<String> getColumnTypes()

  Get the `type name` for each column.

  Specified by:
    `getColumnTypes` in interface `QueryResults.Columns`
  Returns:
    the immutable list of type names, with size equal to `QueryResults.Columns.getColumnCount()`; never null
  See Also:
    `QueryResults.Columns.getColumnTypes()`

### getColumnCount

    public int getColumnCount()

  Get the number of columns in each tuple.

  Specified by:
    `getColumnCount` in interface `QueryResults.Columns`
  Returns:
    the number of columns; always positive
  See Also:
    `QueryResults.Columns.getColumnCount()`

### getLocationCount

    public int getLocationCount()

  Get the number of `Location` objects in each tuple.

  Specified by:
    `getLocationCount` in interface `QueryResults.Columns`
  Returns:
    the number of Location objects; always positive
  See Also:
    `QueryResults.Columns.getLocationCount()`

### getSelectorNames

    public List<String> getSelectorNames()

  Get the names of the selectors that are associated with these results. These results contain a single `Location` object for each of the selectors.

  Specified by:
    `getSelectorNames` in interface `QueryResults.Columns`
  Returns:
    the immutable list of selector names, with size equal to `QueryResults.Columns.getLocationCount()`; never null
  See Also:
    `QueryResults.Columns.getSelectorNames()`

### getTupleSize

    public int getTupleSize()

  Get the size of the tuple arrays.

  Specified by:
    `getTupleSize` in interface `QueryResults.Columns`
  Returns:
    the length of each tuple array
  See Also:
    `QueryResults.Columns.getTupleSize()`

### getTupleValueNames

    public List<String> getTupleValueNames()

  Get the names of the all of the tuple values.

  Specified by:
    `getTupleValueNames` in interface `QueryResults.Columns`
  Returns:
    the immutable list of names
  See Also:
    `QueryResults.Columns.getTupleValueNames()`

### getLocationIndexForColumn

    public int getLocationIndexForColumn(int columnIndex)

  Get the index of a tuple's correct Location object given the column index.

  Specified by:
    `getLocationIndexForColumn` in interface `QueryResults.Columns`
  Parameters:
    `columnIndex` - the column index
  Returns:
    the Location index that corresponds to the supplied column; never negative
  See Also:
    `QueryResults.Columns.getLocationIndexForColumn(int)`

### getLocationIndexForColumn

    public int getLocationIndexForColumn(String columnName)

  Get the index of a tuple's correct Location object given the column index.

  Specified by:
    `getLocationIndexForColumn` in interface `QueryResults.Columns`
  Parameters:
    `columnName` - the column name
  Returns:
    the Location index that corresponds to the supplied column; never negative
  See Also:
    `QueryResults.Columns.getLocationIndexForColumn(java.lang.String)`

### getLocationIndex

    public int getLocationIndex(String selectorName)

  Get the index of a tuple's correct Location object given the name of the selector used in the query.

  Specified by:
    `getLocationIndex` in interface `QueryResults.Columns`
  Parameters:
    `selectorName` - the selector name
  Returns:
    the Location index that corresponds to the supplied column; never negative
  See Also:
    `QueryResults.Columns.getLocationIndex(java.lang.String)`

### hasSelector

    public boolean hasSelector(String selectorName)

  Determine if these results contain values from the selector with the supplied name.

  Specified by:
    `hasSelector` in interface `QueryResults.Columns`
  Parameters:
    `selectorName` - the selector name
  Returns:
    true if the results have values from the supplied selector, or false otherwise
  See Also:
    `QueryResults.Columns.hasSelector(java.lang.String)`

### getPropertyNameForColumn

    public String getPropertyNameForColumn(int columnIndex)

  Get the name of the property that corresponds to the supplied column in each tuple.

  Specified by:
    `getPropertyNameForColumn` in interface `QueryResults.Columns`
  Parameters:
    `columnIndex` - the column index
  Returns:
    the property name; never null
  See Also:
    `QueryResults.Columns.getPropertyNameForColumn(int)`

### getColumnIndexForName

    public int getColumnIndexForName(String columnName)

  Get the index of the column given the column name.

  Specified by:
    `getColumnIndexForName` in interface `QueryResults.Columns`
  Parameters:
    `columnName` - the column name
  Returns:
    the column index
  See Also:
    `QueryResults.Columns.getColumnIndexForName(java.lang.String)`

### columnIndexForName

    protected Integer columnIndexForName(String columnName)

### getSelectorNameForColumnName

    public String getSelectorNameForColumnName(String columnName)

  Get the name of the selector that produced the column with the given name.

  Specified by:
    `getSelectorNameForColumnName` in interface `QueryResults.Columns`
  Parameters:
    `columnName` - the column name
  Returns:
    the selector name
  See Also:
    `QueryResults.Columns.getSelectorNameForColumnName(java.lang.String)`

### getColumnIndexForProperty

    public int getColumnIndexForProperty(String selectorName,
                                         String propertyName)

  Get the index of the column given the name of the selector and the property name from where the column should be obtained.

  Specified by:
    `getColumnIndexForProperty` in interface `QueryResults.Columns`
  Parameters:
    `selectorName` - the selector name
    `propertyName` - the name of the property
  Returns:
    the column index that corresponds to the supplied column; never negative
  See Also:
    `QueryResults.Columns.getColumnIndexForProperty(java.lang.String, java.lang.String)`

### getFullTextSearchScoreIndexFor

    public int getFullTextSearchScoreIndexFor(String selectorName)

  Get the index of the tuple value containing the full-text search score for the node taken from the named selector.

  Specified by:
    `getFullTextSearchScoreIndexFor` in interface `QueryResults.Columns`
  Parameters:
    `selectorName` - the selector name
  Returns:
    the index that corresponds to the `Double` full-text search score, or -1 if there is no full-text search score for the named selector
  See Also:
    `QueryResults.Columns.getFullTextSearchScoreIndexFor(java.lang.String)`

### hasFullTextSearchScores

    public boolean hasFullTextSearchScores()

  Determine whether these results include full-text search scores.

  Specified by:
    `hasFullTextSearchScores` in interface `QueryResults.Columns`
  Returns:
    true if the full-text search scores are included in the results, or false otherwise
  See Also:
    `QueryResults.Columns.hasFullTextSearchScores()`

### includes

    public boolean includes(QueryResults.Columns other)

  Determine whether this mapping includes all of the columns (and locations) in the supplied mapping.

  Specified by:
    `includes` in interface `QueryResults.Columns`
  Parameters:
    `other` - the other mapping; may not be null
  Returns:
    true if all of the other mapping's columns and locations are included in this mapping, or false otherwise
  See Also:
    `QueryResults.Columns.includes(org.modeshape.graph.query.QueryResults.Columns)`

### isUnionCompatible

    public boolean isUnionCompatible(QueryResults.Columns other)

  Determine whether this column and the other are union-compatible (that is, having the same columns).

  Specified by:
    `isUnionCompatible` in interface `QueryResults.Columns`
  Parameters:
    `other` - the other mapping; may not be null
  Returns:
    true if this and the supplied columns definition are union-compatible, or false if they are not
  See Also:
    `QueryResults.Columns.isUnionCompatible(org.modeshape.graph.query.QueryResults.Columns)`

### equals

    public boolean equals(Object obj)

  Overrides:
    `equals` in class `Object`
  See Also:
    `Object.equals(java.lang.Object)`

### columnNameFor

    protected static String columnNameFor(Column column,
                                          List<String> columnNames,
                                          Set<Column> columnsWithDuplicateNames)

### findColumnsWithSameNames

    protected static Set<Column> findColumnsWithSameNames(List<Column> columns)

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`
  See Also:
    `Object.toString()`

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