Package com.e1c.langtool.history.db.query

Class ExpressionBuilder

java.lang.Object

com.e1c.langtool.history.db.query.ExpressionBuilder

public final class ExpressionBuilder
extends Object

Builder to construct immutable expressions based on operations.

This builder creates expressions with operations in the reversed order and considers boolean operators as unary.

For example this query expression:

ExpressionBuilder.where(Criteries.valueEqual("val"))
          .and(Criteries.langEqual("en"))
          .andNot(Criteries.projectEqual("proj")).build();
 

will be represented as the following tree:

                    AND
                    /\
                   /  \
                 AND  NOT
                 /\     \
                /  \    project='proj'
               /    \
 value EQUAL 'val'   language = 'en'
 

Method Summary

Modifier and Type	Method	Description
ExpressionBuilder	and(IExpression expression)
static IExpression	and(IExpression exp1, IExpression exp2)
ExpressionBuilder	andNot(IExpression expression)
IExpression	build()
ExpressionBuilder	or(IExpression expression)
ExpressionBuilder	orNot(IExpression expression)
static ExpressionBuilder	where(IExpression expression)

Methods inherited from class java.lang.Object

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

Method Details

and

public static IExpression and(IExpression exp1,
 IExpression exp2)

where

public static ExpressionBuilder where(IExpression expression)

and

public ExpressionBuilder and(IExpression expression)

or

public ExpressionBuilder or(IExpression expression)

andNot

public ExpressionBuilder andNot(IExpression expression)

orNot

public ExpressionBuilder orNot(IExpression expression)

build

public IExpression build()