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<h2>XQuery mode</h2>
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<textarea id="code" name="code">
xquery version "1.0-ml";
(: this is
: a
"comment" :)
let $let := <x attr="value">"test"<func>function() $var {function()} {$var}</func></x>
let $joe:=1
return element element {
attribute attribute { 1 },
element test { 'a' },
attribute foo { "bar" },
fn:doc()[ foo/@bar eq $let ],
//x }
(: a more 'evil' test :)
(: Modified Blakeley example (: with nested comment :) ... :)
declare private function local:declare() {()};
declare private function local:private() {()};
declare private function local:function() {()};
declare private function local:local() {()};
let $let := <let>let $let := "let"</let>
return element element {
attribute attribute { try { xdmp:version() } catch($e) { xdmp:log($e) } },
attribute fn:doc { "bar" castable as xs:string },
element text { text { "text" } },
fn:doc()[ child::eq/(@bar | attribute::attribute) eq $let ],
//fn:doc
}
xquery version "1.0-ml";
(: Copyright 2006-2010 Mark Logic Corporation. :)
(:
: Licensed under the Apache License, Version 2.0 (the "License");
: you may not use this file except in compliance with the License.
: You may obtain a copy of the License at
:
: http://www.apache.org/licenses/LICENSE-2.0
:
: Unless required by applicable law or agreed to in writing, software
: distributed under the License is distributed on an "AS IS" BASIS,
: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
: See the License for the specific language governing permissions and
: limitations under the License.
:)
module namespace json = "http://marklogic.com/json";
declare default function namespace "http://www.w3.org/2005/xpath-functions";
(: Need to backslash escape any double quotes, backslashes, and newlines :)
declare function json:escape($s as xs:string) as xs:string {
let $s := replace($s, "\\", "\\\\")
let $s := replace($s, """", "\\""")
let $s := replace($s, codepoints-to-string((13, 10)), "\\n")
let $s := replace($s, codepoints-to-string(13), "\\n")
let $s := replace($s, codepoints-to-string(10), "\\n")
return $s
};
declare function json:atomize($x as element()) as xs:string {
if (count($x/node()) = 0) then 'null'
else if ($x/@type = "number") then
let $castable := $x castable as xs:float or
$x castable as xs:double or
$x castable as xs:decimal
return
if ($castable) then xs:string($x)
else error(concat("Not a number: ", xdmp:describe($x)))
else if ($x/@type = "boolean") then
let $castable := $x castable as xs:boolean
return
if ($castable) then xs:string(xs:boolean($x))
else error(concat("Not a boolean: ", xdmp:describe($x)))
else concat('"', json:escape($x), '"')
};
(: Print the thing that comes after the colon :)
declare function json:print-value($x as element()) as xs:string {
if (count($x/*) = 0) then
json:atomize($x)
else if ($x/@quote = "true") then
concat('"', json:escape(xdmp:quote($x/node())), '"')
else
string-join(('{',
string-join(for $i in $x/* return json:print-name-value($i), ","),
'}'), "")
};
(: Print the name and value both :)
declare function json:print-name-value($x as element()) as xs:string? {
let $name := name($x)
let $first-in-array :=
count($x/preceding-sibling::*[name(.) = $name]) = 0 and
(count($x/following-sibling::*[name(.) = $name]) > 0 or $x/@array = "true")
let $later-in-array := count($x/preceding-sibling::*[name(.) = $name]) > 0
return
if ($later-in-array) then
() (: I was handled previously :)
else if ($first-in-array) then
string-join(('"', json:escape($name), '":[',
string-join((for $i in ($x, $x/following-sibling::*[name(.) = $name]) return json:print-value($i)), ","),
']'), "")
else
string-join(('"', json:escape($name), '":', json:print-value($x)), "")
};
(:~
Transforms an XML element into a JSON string representation. See http://json.org.
<p/>
Sample usage:
<pre>
xquery version "1.0-ml";
import module namespace json="http://marklogic.com/json" at "json.xqy";
json:serialize(&lt;foo&gt;&lt;bar&gt;kid&lt;/bar&gt;&lt;/foo&gt;)
</pre>
Sample transformations:
<pre>
&lt;e/&gt; becomes {"e":null}
&lt;e&gt;text&lt;/e&gt; becomes {"e":"text"}
&lt;e&gt;quote " escaping&lt;/e&gt; becomes {"e":"quote \" escaping"}
&lt;e&gt;backslash \ escaping&lt;/e&gt; becomes {"e":"backslash \\ escaping"}
&lt;e&gt;&lt;a&gt;text1&lt;/a&gt;&lt;b&gt;text2&lt;/b&gt;&lt;/e&gt; becomes {"e":{"a":"text1","b":"text2"}}
&lt;e&gt;&lt;a&gt;text1&lt;/a&gt;&lt;a&gt;text2&lt;/a&gt;&lt;/e&gt; becomes {"e":{"a":["text1","text2"]}}
&lt;e&gt;&lt;a array="true"&gt;text1&lt;/a&gt;&lt;/e&gt; becomes {"e":{"a":["text1"]}}
&lt;e&gt;&lt;a type="boolean"&gt;false&lt;/a&gt;&lt;/e&gt; becomes {"e":{"a":false}}
&lt;e&gt;&lt;a type="number"&gt;123.5&lt;/a&gt;&lt;/e&gt; becomes {"e":{"a":123.5}}
&lt;e quote="true"&gt;&lt;div attrib="value"/&gt;&lt;/e&gt; becomes {"e":"&lt;div attrib=\"value\"/&gt;"}
</pre>
<p/>
Namespace URIs are ignored. Namespace prefixes are included in the JSON name.
<p/>
Attributes are ignored, except for the special attribute @array="true" that
indicates the JSON serialization should write the node, even if single, as an
array, and the attribute @type that can be set to "boolean" or "number" to
dictate the value should be written as that type (unquoted). There's also
an @quote attribute that when set to true writes the inner content as text
rather than as structured JSON, useful for sending some XHTML over the
wire.
<p/>
Text nodes within mixed content are ignored.
@param $x Element node to convert
@return String holding JSON serialized representation of $x
@author Jason Hunter
@version 1.0.1
Ported to xquery 1.0-ml; double escaped backslashes in json:escape
:)
declare function json:serialize($x as element()) as xs:string {
string-join(('{', json:print-name-value($x), '}'), "")
};
</textarea>
</div>
<script>
var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
lineNumbers: true,
matchBrackets: true,
theme: "xq-dark"
});
</script>
<p><strong>MIME types defined:</strong> <code>application/xquery</code>.</p>
<p>Development of the CodeMirror XQuery mode was sponsored by
<a href="http://marklogic.com">MarkLogic</a> and developed by
<a href="https://twitter.com/mbrevoort">Mike Brevoort</a>.
</p>
</article>