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

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

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

    @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 `QueryResults.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` | `getPropertyNameForColumnName(String columnName)` Get the name of the property that corresponds to the named 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 `QueryResults.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 `QueryResults.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)

  Description copied from interface: `QueryResults.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

### subSelect

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

  Description copied from interface: `QueryResults.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

### joinWith

    public QueryResults.Columns joinWith(QueryResults.Columns rightColumns)

  Description copied from interface: `QueryResults.Columns`
  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

### getColumns

    public List<? extends Column> getColumns()

  Description copied from interface: `QueryResults.Columns`
  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

### iterator

    public Iterator<Column> iterator()

  Specified by:
    `iterator` in interface `Iterable<Column>`

### getColumnNames

    public List<String> getColumnNames()

  Description copied from interface: `QueryResults.Columns`
  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

### getColumnTypes

    public List<String> getColumnTypes()

  Description copied from interface: `QueryResults.Columns`
  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

### getColumnCount

    public int getColumnCount()

  Description copied from interface: `QueryResults.Columns`
  Get the number of columns in each tuple.

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

### getLocationCount

    public int getLocationCount()

  Description copied from interface: `QueryResults.Columns`
  Get the number of `QueryResults.Location` objects in each tuple.

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

### getSelectorNames

    public List<String> getSelectorNames()

  Description copied from interface: `QueryResults.Columns`
  Get the names of the selectors that are associated with these results. These results contain a single `QueryResults.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

### getTupleSize

    public int getTupleSize()

  Description copied from interface: `QueryResults.Columns`
  Get the size of the tuple arrays.

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

### getTupleValueNames

    public List<String> getTupleValueNames()

  Description copied from interface: `QueryResults.Columns`
  Get the names of the all of the tuple values.

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

### getLocationIndexForColumn

    public int getLocationIndexForColumn(int columnIndex)

  Description copied from interface: `QueryResults.Columns`
  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

### getLocationIndexForColumn

    public int getLocationIndexForColumn(String columnName)

  Description copied from interface: `QueryResults.Columns`
  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

### getLocationIndex

    public int getLocationIndex(String selectorName)

  Description copied from interface: `QueryResults.Columns`
  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

### hasSelector

    public boolean hasSelector(String selectorName)

  Description copied from interface: `QueryResults.Columns`
  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

### getPropertyNameForColumn

    public String getPropertyNameForColumn(int columnIndex)

  Description copied from interface: `QueryResults.Columns`
  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

### getPropertyNameForColumnName

    public String getPropertyNameForColumnName(String columnName)

  Description copied from interface: `QueryResults.Columns`
  Get the name of the property that corresponds to the named column in each tuple.

  Specified by:
    `getPropertyNameForColumnName` in interface `QueryResults.Columns`
  Parameters:
    `columnName` - the column name
  Returns:
    the property name, or the supplied column name if there is no property for it

### getColumnIndexForName

    public int getColumnIndexForName(String columnName)

  Description copied from interface: `QueryResults.Columns`
  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

### columnIndexForName

    protected Integer columnIndexForName(String columnName)

### getSelectorNameForColumnName

    public String getSelectorNameForColumnName(String columnName)

  Description copied from interface: `QueryResults.Columns`
  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

### getColumnIndexForProperty

    public int getColumnIndexForProperty(String selectorName,
                                         String propertyName)

  Description copied from interface: `QueryResults.Columns`
  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

### getFullTextSearchScoreIndexFor

    public int getFullTextSearchScoreIndexFor(String selectorName)

  Description copied from interface: `QueryResults.Columns`
  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

### hasFullTextSearchScores

    public boolean hasFullTextSearchScores()

  Description copied from interface: `QueryResults.Columns`
  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

### includes

    public boolean includes(QueryResults.Columns other)

  Description copied from interface: `QueryResults.Columns`
  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

### isUnionCompatible

    public boolean isUnionCompatible(QueryResults.Columns other)

  Description copied from interface: `QueryResults.Columns`
  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

### equals

    public boolean equals(Object obj)

  Overrides:
    `equals` in class `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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