基于Java的实例开发源码-JSON查询语言 Jaql.zip

//=========================================================================== // Testcases for FilterPushDown // It tests pushing Filter below Transform, Join, Group By, Sort, Merge // It handles predicate decomposition (Dividing Filter predicates into conjunctive sub-predicates) //=========================================================================== $data_books = [ {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Deathly Hallows', year: 2007, format: {cover: 'hard', pages: 1302}, price: [3, 34.0, 102222, 3.3]}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Chamber of Secrets', year: 1999, format: {cover: 'hard', pages: 1302}}, {publisher: 'XYZ', author: 'J. K. Rowling', title: 'Deathly Hallows', year: 1998, format: {cover: 'soft', pages: 1200}, price: [120.5, 110.0]}, {publisher: 'Ray ST', author: 'New Rowling', title: 'Chamber of Secrets', year: 1998, reviews: [{rating: 10, user: 'joe', review: 'The best ...'}]}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Sorcerers Stone', year: 1996, format: {cover: 'hard', pages: 742}, price: [11.0, 17.5]}, {publisher: 'Scholastic', author: 'R. L. Stine', title: 'Monster Blood IV', year: 1995, format: {cover: 'soft', pages: 302}}, {publisher: 'Grosset', author: 'Carolyn Keene', title: 'The Secret of Kane', year: 1988}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Deathly Hallows', year: 1987}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Chamber of Secrets', year: 1987, reviews: [ {rating: 10, user: 'joe', review: 'The best ...'}, {rating: 6, user: 'mary', review: 'Average ...'}]}, {publisher: 'XYZ', author: 'J. K. Rowling', title: 'Deathly Hallows', year: 1986}, {publisher: 'Foster', author: 'Old Rowling', title: 'Chamber of Secrets', year: 1979, reviews: [{rating: 10, user: 'joe', review: 'The best ...'}]}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Sorcerers Stone', year: 1978}, {publisher: 'Scholastic', author: 'R. L. Stine', title: 'Monster Blood IV', year: 1977, price: [3.6, 20.5, 41.0] }, {publisher: 'Grosset', author: 'Carolyn Keene', title: 'The Secret of Kane', year: 1920, format: {cover: 'hard', pages: 66}} ]; $data_books2 = [ {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Deathly Hallows', year: 2007, format: {cover: 'hard', pages: 1302}, price: [30.5, 33.5, 34.0]}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Chamber of Secrets', year: 1999, format: {cover: 'hard', pages: 1302}, price: [20.1, 25.0] }, {publisher: 'XYZ', author: 'J. K. Rowling', title: 'Deathly Hallows', year: 1998, format: {cover: 'soft', pages: 1200}, price: [120.5, 110.0]}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Sorcerers Stone', year: 1996, format: {cover: 'hard', pages: 742}, price: [11.0, 17.5]}, {publisher: 'Scholastic', author: 'R. L. Stine', title: 'Monster Blood IV', year: 1995, format: {cover: 'soft', pages: 302}}, {publisher: 'Grosset', author: 'Carolyn Keene', title: 'The Secret of Kane', year: 1988}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Deathly Hallows', year: 1987}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Chamber of Secrets', year: 1987, reviews: [ {rating: 10, user: 'joe', review: 'The best ...'}, {rating: 6, user: 'mary', review: 'Average ...'}]}, {publisher: 'XYZ', author: 'J. K. Rowling', title: 'Deathly Hallows', year: 1986}, {publisher: 'Foster', author: 'Old Rowling', title: 'Chamber of Secrets', year: 1979, reviews: [{rating: 10, user: 'joe', review: 'The best ...'}]}, {publisher: 'Scholastic', author: 'J. K. Rowling', title: 'Sorcerers Stone', year: 1978}, {publisher: 'Scholastic', author: 'R. L. Stine', title: 'Monster Blood IV', year: 1977, price: [3.6, 20.5, 41.0] }, {publisher: 'Grosset', author: 'Carolyn Keene', title: 'The Secret of Kane', year: 1920, format: {cover: 'hard', pages: 66}} ]; //=========================Testing Filter-Transform=================================================== //Returns 8 records --Should be pusheddown $data_books -> transform {x: $.author, $.year} -> filter $.x == 'J. K. Rowling'; //Returns count of 14 records --Should be pusheddown TWICE $data_books -> transform each $d {x: $d.author, $d.format.cover, y:$d.price} -> transform each $g [$g.x, $g.y] -> filter true ->count(); //Returns count of 3 records --Should be pusheddown (All the three predicates) $data_books -> transform {n: $.author, x: $, $.year , $.format.cover, $, c: $.format.cover, f: $.price-> count(), k: "33333"} -> filter each $dd $dd.cover == 'hard' and $dd.k == '33333' and $dd."".author == 'J. K. Rowling' -> count(); //Returns count of 2 records --(Predicates 1, 2, and 4 should be pusheddown) (Predicate 3 stays as is) $data_books -> transform {n: $.author, x: $, $.year , $.format.cover, $, c: $.format.cover, f: $.price-> count(), k: "33333"} -> filter $.cover == 'hard' and $.k == '33333' and $.f > 1 and $."".author == 'J. K. Rowling' -> count() ; //Returns 3 records --Should be pusheddown $data_books -> transform each $d {n: $d.author, m: $d.year, $d.year , c: $d.format} -> filter each $x $x.m >= 2004 or $x.c.cover == 'soft'; //Returns 6 records --Should be pusheddown $data_books -> transform ($.year) -> filter $ > 1990; //Returns 4 records --Should be pusheddown $data_books -> transform ($.format) -> filter $.cover == 'hard'; //Returns 4 records --Should be pusheddown $data_books -> transform {$.author, cnt: $.year + $.format.pages * 2} -> filter each $x $x.cnt > 3000; //Returns 2 records --Should be pusheddown TWICE $data_books -> transform each $d {x: $d.author, $d.format.cover, y:$d.price} -> transform each $g [$g.x, $g.y] -> filter $[0] == 'R. L. Stine'; //Returns 1 record --First predicate should be pushed TWICE. The second predicate should be pusheddown ONCE $data_books -> transform each $d {x: $d.author, $d.format.cover, y:sum($d.price)} -> transform each $g [$g.x, $g.y] -> filter $[0] == 'R. L. Stine' and $[1]> 20; //Returns 4 records --Should be pusheddown ONCE $data_books -> transform [$, $.author, $.format, "3333" ,{name: $.publisher, y: $.year}, max($.price)] -> transform {c:$[2].cover, $[4].name, max: $[5] } -> filter $.max > 2; //Returns 2 records --Should be pusheddown TWICE $data_books -> transform [$, $.author, $.format, "3333" ,{name: $.publisher, y: $.year}, max($.price)] -> transform {c:$[2].cover, $[4].name, max: $[5] } -> filter $.c == 'soft'; //Returns 2 records --Should be pusheddown TWICE $data_books -> transform each $d {x: $d.author, $d.format.cover, y:$d.price} -> transform each $g [$g.x, $g.y] -> filter count($[1]) > 2; //Returns 1 record --(Predicate $.a == 1 should be pushed down. // Predicate count($.less)>4 remains as is). [{a:1, b:[1,2,3,4,5,6,6,77,87,43,122]}, {a:2, b:[12,3,34434,766,33,11,10,2]}]