/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Other licenses:
* -----------------------------------------------------------------------------
* Commercial licenses for this work are available. These replace the above
* ASL 2.0 and offer limited warranties, support, maintenance, and commercial
* database integrations.
*
* For more information, please visit: http://www.jooq.org/licenses
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
package org.jooq;
import java.util.stream.Stream;
/**
* A model type for a row value expression.
* <p>
* Note: Not all databases support row value expressions, but many row value
* expression operations can be emulated on all databases. See relevant row
* value expression method Javadocs for details.
*
* @author Lukas Eder
*/
public interface Row extends FieldOrRow {
/**
* Get the degree of this row value expression.
*/
int size();
/**
* Get the fields from this row as a {@link Stream}.
*/
Stream<Field<?>> fieldStream();
/**
* Get a specific field from this row.
* <p>
* Usually, this will return the field itself. However, if this is a row
* from an aliased table, the field will be aliased accordingly.
*
* @param <T> The generic field type
* @param field The field to fetch
* @return The field itself or an aliased field
*/
<T> Field<T> field(Field<T> field);
/**
* Get a specific field from this row.
*
* @param fieldName The field to fetch
* @return The field with the given name
*/
Field<?> field(String fieldName);
/**
* Get a specific field from this row and coerce it to <code>type</code>.
*
* @param fieldName The field to fetch
* @param type The type to coerce the resulting field to
* @return The field with the given name
*/
<T> Field<T> field(String fieldName, Class<T> type);
/**
* Get a specific field from this row and coerce it to <code>dataType</code>.
*
* @param fieldName The field to fetch
* @param dataType The type to coerce the resulting field to
* @return The field with the given name
*/
<T> Field<T> field(String fieldName, DataType<T> dataType);
/**
* Get a specific field from this row.
*
* @param fieldName The field to fetch
* @return The field with the given name
*/
Field<?> field(Name fieldName);
/**
* Get a specific field from this row and coerce it to <code>type</code>.
*
* @param fieldName The field to fetch
* @param type The type to coerce the resulting field to
* @return The field with the given name
*/
<T> Field<T> field(Name fieldName, Class<T> type);
/**
* Get a specific field from this row and coerce it to <code>dataType</code>.
*
* @param fieldName The field to fetch
* @param dataType The type to coerce the resulting field to
* @return The field with the given name
*/
<T> Field<T> field(Name fieldName, DataType<T> dataType);
/**
* Get a specific field from this row.
*
* @param fieldIndex The field's index of the field to fetch
* @return The field with the given name
*/
Field<?> field(int fieldIndex);
/**
* Get a specific field from this row and coerce it to <code>type</code>.
*
* @param fieldIndex The field's index of the field to fetch
* @param type The type to coerce the resulting field to
* @return The field with the given name
*/
<T> Field<T> field(int fieldIndex, Class<T> type);
/**
* Get a specific field from this row and coerce it to <code>dataType</code>.
*
* @param fieldIndex The field's index of the field to fetch
* @param dataType The type to coerce the resulting field to
* @return The field with the given name
*/
<T> Field<T> field(int fieldIndex, DataType<T> dataType);
/**
* Get all fields from this row.
*
* @return All available fields
*/
Field<?>[] fields();
/**
* Get all fields from this row, providing some fields.
*
* @return All available fields
* @see #field(Field)
*/
Field<?>[] fields(Field<?>... fields);
/**
* Get all fields from this row, providing some field names.
*
* @return All available fields
* @see #field(String)
*/
Field<?>[] fields(String... fieldNames);
/**
* Get all fields from this row, providing some field names.
*
* @return All available fields
* @see #field(Name)
*/
Field<?>[] fields(Name... fieldNames);
/**
* Get all fields from this row, providing some field indexes.
*
* @return All available fields
* @see #field(int)
*/
Field<?>[] fields(int... fieldIndexes);
/**
* Get a field's index from this row.
*
* @param field The field to look for
* @return The field's index or <code>-1</code> if the field is not
* contained in this <code>Row</code>
*/
int indexOf(Field<?> field);
/**
* Get a field's index from this row.
*
* @param fieldName The field name to look for
* @return The field's index or <code>-1</code> if the field is not
* contained in this <code>Row</code>
*/
int indexOf(String fieldName);
/**
* Get a field's index from this row.
*
* @param fieldName The field name to look for
* @return The field's index or <code>-1</code> if the field is not
* contained in this <code>Row</code>
*/
int indexOf(Name fieldName);
/**
* Get an array of types for this row.
* <p>
* Entries in the resulting array correspond to {@link Field#getType()} for
* the corresponding <code>Field</code> in {@link #fields()}
*/
Class<?>[] types();
/**
* Get the type for a given field index.
*
* @param fieldIndex The field's index of the field's type to fetch
* @return The field's type
*/
Class<?> type(int fieldIndex);
/**
* Get the type for a given field name.
*
* @param fieldName The field's name of the field's type to fetch
* @return The field's type
*/
Class<?> type(String fieldName);
/**
* Get the type for a given field name.
*
* @param fieldName The field's name of the field's type to fetch
* @return The field's type
*/
Class<?> type(Name fieldName);
/**
* Get an array of data types for this row.
* <p>
* Entries in the resulting array correspond to {@link Field#getDataType()}
* for the corresponding <code>Field</code> in {@link #fields()}
*/
DataType<?>[] dataTypes();
/**
* Get the data type for a given field index.
*
* @param fieldIndex The field's index of the field's data type to fetch
* @return The field's data type
*/
DataType<?> dataType(int fieldIndex);
/**
* Get the data type for a given field name.
*
* @param fieldName The field's name of the field's data type to fetch
* @return The field's data type
*/
DataType<?> dataType(String fieldName);
/**
* Get the data type for a given field name.
*
* @param fieldName The field's name of the field's data type to fetch
* @return The field's data type
*/
DataType<?> dataType(Name fieldName);
// ------------------------------------------------------------------------
// [NOT] NULL predicates
// ------------------------------------------------------------------------
/**
* Check if this row value expression contains only <code>NULL</code>
* values.
* <p>
* Row NULL predicates can be emulated in those databases that do not
* support such predicates natively: <code>(A, B) IS NULL</code> is
* equivalent to <code>A IS NULL AND B IS NULL</code>
*/
@Support
Condition isNull();
/**
* Check if this row value expression contains no <code>NULL</code> values.
* <p>
* Row NOT NULL predicates can be emulated in those databases that do not
* support such predicates natively: <code>(A, B) IS NOT NULL</code> is
* equivalent to <code>A IS NOT NULL AND B IS NOT NULL</code>
* <p>
* Note that the two following predicates are NOT equivalent:
* <ul>
* <li><code>(A, B) IS NOT NULL</code>, which is the same as
* <code>(A IS NOT NULL) AND (B IS NOT NULL)</code></li>
* <li><code>NOT((A, B) IS NULL)</code>, which is the same as
* <code>(A IS NOT NULL) OR (B IS NOT NULL)</code></li>
* </ul>
*/
@Support
Condition isNotNull();
}