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package org.jooq;

import java.util.function.Function;

import org.jooq.conf.Settings;

import org.jetbrains.annotations.NotNull;

An object that can behave like a field (a field-like object).

Instances of this type cannot be created directly, only of its subtypes.
Author:
Lukas Eder/**
 * An object that can behave like a field (a field-like object).
 * <p>
 * Instances of this type cannot be created directly, only of its subtypes.
 *
 * @author Lukas Eder
 */
public interface FieldLike {

    
The underlying field representation of this object.

This method is useful for things like
SELECT y.*, (SELECT a FROM x) FROM y
Returns:
This result provider as a Field<?> object/**
     * The underlying field representation of this object.
     * <p>
     * This method is useful for things like
     * <code>SELECT y.*, (SELECT a FROM x) FROM y</code>
     *
     * @return This result provider as a Field&lt;?&gt; object
     */
    @NotNull
    <T> Field<T> asField();

    
The underlying field representation of this object.

This method is useful for things like
SELECT y.*, (SELECT a FROM x) [alias] FROM y
 Note that the case-sensitivity of the returned field depends on Settings.getRenderQuotedNames(). By default, field aliases are quoted, and thus case-sensitive in many SQL dialects! 
Returns:
This result provider as a Field<?> object/**
     * The underlying field representation of this object.
     * <p>
     * This method is useful for things like
     * <code>SELECT y.*, (SELECT a FROM x) [alias] FROM y</code>
     * <p>
     * Note that the case-sensitivity of the returned field depends on
     * {@link Settings#getRenderQuotedNames()}. By default, field aliases are
     * quoted, and thus case-sensitive in many SQL dialects!
     *
     * @return This result provider as a Field&lt;?&gt; object
     */
    @NotNull
    <T> Field<T> asField(String alias);


    
The underlying field representation of this object.

This method is useful for things like
SELECT y.*, (SELECT a FROM x) [alias] FROM y
 Note that the case-sensitivity of the returned field depends on Settings.getRenderQuotedNames(). By default, field aliases are quoted, and thus case-sensitive in many SQL dialects! 
 This works like asField(String), except that field aliases are provided by a function. This is useful, for instance, to prefix all columns with a common prefix (on Table.as(String, Function)): 

MY_TABLE.as("t1", f -> "prefix_" + f.getName());


And then to use the same function also for individual fields:

MY_TABLE.MY_COLUMN.as(f -> "prefix_" + f.getName());

Deprecated:
- 3.14.0 - [#10156] - These methods will be removed without
            replacement from a future jOOQ. They offer convenience that
            is unidiomatic for jOOQ's DSL, without offering functionality
            that would not be possible otherwise - yet they add
            complexity in jOOQ's internals./**
     * The underlying field representation of this object.
     * <p>
     * This method is useful for things like
     * <code>SELECT y.*, (SELECT a FROM x) [alias] FROM y</code>
     * <p>
     * Note that the case-sensitivity of the returned field depends on
     * {@link Settings#getRenderQuotedNames()}. By default, field aliases are
     * quoted, and thus case-sensitive in many SQL dialects!
     * <p>
     * This works like {@link #asField(String)}, except that field aliases are
     * provided by a function. This is useful, for instance, to prefix all
     * columns with a common prefix (on {@link Table#as(String, Function)}):
     * <p>
     * <code><pre>
     * MY_TABLE.as("t1", f -&gt; "prefix_" + f.getName());
     * </pre></code>
     * <p>
     * And then to use the same function also for individual fields:
     * <p>
     * <code><pre>
     * MY_TABLE.MY_COLUMN.as(f -&gt; "prefix_" + f.getName());
     * </pre></code>
     *
     * @deprecated - 3.14.0 - [#10156] - These methods will be removed without
     *             replacement from a future jOOQ. They offer convenience that
     *             is unidiomatic for jOOQ's DSL, without offering functionality
     *             that would not be possible otherwise - yet they add
     *             complexity in jOOQ's internals.
     */
    @Deprecated
    @NotNull
    @Support
    <T> Field<T> asField(Function<? super Field<T>, ? extends String> aliasFunction);


}