me.saharnooby.lib.query.query

Class ConditionalQuery<T extends ConditionalQuery<T>>

java.lang.Object

me.saharnooby.lib.query.query.AbstractQuery

me.saharnooby.lib.query.query.ConditionalQuery<T>

Direct Known Subclasses:

Delete, Select, Update

public abstract class ConditionalQuery<T extends ConditionalQuery<T>>
extends AbstractQuery

Represents an SQL query with WHERE clause.

Since:

17:05 15.11.2019

Author:

saharNooby

Field Summary

Fields

Modifier and Type	Field and Description
protected List<Expression>	conditions

Constructor Summary

Constructors

Constructor and Description
ConditionalQuery()

Method Summary

Modifier and Type	Method and Description
protected void	appendConditions(@NonNull StringBuilder sb)
T	where(@NonNull String column, @NonNull Object value) Adds a WHERE condition that checks that specified column has specified value.
T	whereExpr(@NonNull String expr, Object... params) Adds an SQL expression as a WHERE condition, like `mycolumn` / 100 = ?
T	whereNull(@NonNull String column) Adds a WHERE condition that checks that specified column has a NULL value.
T	whereNullable(@NonNull String column, Object value) Adds a WHERE condition that checks that specified column has specified value, which can be NULL.

Methods inherited from class me.saharnooby.lib.query.query.AbstractQuery

getParams, getSQL, prepareStatement, prepareStatement, query, queryAndMap, queryAndMapAll, update, update, updateWithKeys, updateWithKeysAndMap, updateWithKeysAndMapAll

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

conditions

protected final List<Expression> conditions

Constructor Detail

ConditionalQuery

public ConditionalQuery()

Method Detail

where

public final T where(@NonNull
                     @NonNull String column,
                     @NonNull
                     @NonNull Object value)

Adds a WHERE condition that checks that specified column has specified value. Conditions are chained with AND operation.

Parameters:

column - Column name.

value - Value.

Returns:

This object.

whereExpr

public final T whereExpr(@NonNull
                         @NonNull String expr,
                         @NonNull
                         Object... params)

Adds an SQL expression as a WHERE condition, like `mycolumn` / 100 = ?. Conditions are chained with AND operation.

Parameters:

expr - SQL expression.

params - Expression parameters (filled in placeholders ?).

Returns:

This object.

whereNull

public final T whereNull(@NonNull
                         @NonNull String column)

Adds a WHERE condition that checks that specified column has a NULL value. Conditions are chained with AND operation.

Parameters:

column - Column name.

Returns:

This object.

whereNullable

public final T whereNullable(@NonNull
                             @NonNull String column,
                             Object value)

Adds a WHERE condition that checks that specified column has specified value, which can be NULL. Conditions are chained with AND operation.

Parameters:

column - Column name.

value - Value to add.

Returns:

This object.

appendConditions

protected void appendConditions(@NonNull
                                @NonNull StringBuilder sb)