jsonfn

FreeMarker development only

jsonfn templating functions generate JSON from JCR nodes in any workspace. This allows you to generate highly customized JSON without writing custom Java classes.

These templating functions are provided by the magnolia-jsonfn module which is hosted in the github.com/magnolia-community/jsonfn repository. The jsonfn templating functions originated in the neat-jsonfn module, hosted on GitHub and developed by rah003.

Installation

jsonfn templating functions are not bundled with preconfigured Magnolia bundles or webapps.

Installing with Maven

Bundled modules are automatically installed for you.

If the module is unbundled, add the following to your bundle including your project’s <dependencyManagement> section and your webapp’s <dependencies> section. If the module is unbundled but the parent POM manages the version, add the following to your webapp’s <dependencies> section.

<dependency>
  <groupId>info.magnolia.templating</groupId>
  <artifactId>magnolia-jsonfn</artifactId>
  <version>1.0.9</version> (1)
</dependency>
1 Should you need to specify the module version, do it using <version>.

General usage of jsonfn

Use jsonfn to generate JSON from JCR nodes. You can customize the JSON to suit your needs by combining methods.

Combine at least one node defining method with one property defining method. All property defining methods are applied to all nodes. Finish with the #print method to get JSON as a string.

jsonfn methods are provided by the JsonTemplatingFunctions class. These methods return a JsonBuilder object to apply on further methods, which in turn return the same JsonBuilder object. This allows the methods to be applied in an additive way.

Generating JSON

To generate JSON:

Define the JCR node(s) to transform into JSON.

required

See Node defining methods.

Define the JCR properties to be added to the JSON object.

required

See Property defining methods.

Customize JSON, resolve referenced nodes and renditions, format.

optional

Generate the JSON string with the #print method.

required

See print.

Rendering JSON

In your FreeMarker template render the JSON string directly in the output stream (or assign it to a JavaScript variable).

Example:

[#assign pageNode = cmsfn.contentByPath("/vinyl", "website") /]\
${jsonfn`[`.from(pageNode)`]{style="color: rgb(102, 102, 153);"}[`.addAll().exclude("mgnl.*", "jcr.*")`]{style="color: rgb(0, 128, 128);"}[`.print()`]{style="color: rgb(153, 51, 102);"}`}

  • Node defining method

  • Property defining methods

  • Get the JSON String

Example output:

{
  "@nodeType" : "mgnl:page",
  "@name" : "vinyl",
  "@link" : "/vinyl-site/",
  "hideInNav" : true,
  "@depth" : 1,
  "navigationTitle" : "Best vinyl",
  "windowTitle" : "Best vinyl",
  "@id" : "17ac0768-4337-4dda-a8da-223c036d299d",
  "title" : "Best vinyl",
  "@path" : "/vinyl"
}

==

Node defining methods

Select the JCR nodes to transform into JSON. All methods return a JsonBuilder object to apply to further methods.

from

Get JSON by a given Node or ContentMap.

Method signatures

JsonBuilder from(Node node)

JsonBuilder from(ContentMap node)

Argument

Argument Description

node

required

The node you want to work with.

Example

[#assign contentMap = cmsfn.contentByPath("/comics", "website") /]\
[#assign contentNode = cmsfn.asJCRNode(cmsfn.contentByPath("/vinyl", "website")) /]\
[\
${jsonfn`**`.from(contentMap)`**`.add("title").print()},\
${jsonfn`**`.from(contentNode)`**`.add("title").print()}\
]

While the code on line 2 probably has no practical application, it is included to demonstrate that the #from method can also handle the javax.jcr.Node as an argument.

[
  {
  "title" : "Best comics"
},
  {
  "title" : "Best vinyl"
}
]

fromChildNodesOf

Get the child nodes of a given node or workspace. The given node can be a Node or a ContentMap. In the case of a workspace, the technical JCR root is not taken into account. The resultant JSON is an array (see example below).

Combine with the down method if you want more than the direct children.

Method signature

JsonBuilder fromChildNodesOf(String workspaceName)

JsonBuilder fromChildNodesOf(ContentMap node)

JsonBuilder fromChildNodesOf(Node node)

Argument

Argument

Description

fromChildNodesOf(workspaceName)

workspaceName

required

The name of the workspace.

fromChildNodesOf(node)

node

required

The node from which the child nodes should be taken into account.

Example

${jsonfn`**`.fromChildNodesOf("website")`**`.down(2).allowOnlyNodeTypes("mgnl:page").add("title", "@path").print()}

The example will collect all nodes of the type mgnl:page from the website workspace down to level 2.

[ {
  "us-comics" : {
    "title" : "US comics",
    "@path" : "/comics/us-comics"
  },
  "belgian-comics" : {
    "title" : "Belgian comics",
    "@path" : "/comics/belgian-comics"
  },
  "title" : "Best comics",
  "@path" : "/comics"
}, {
  "Rock" : {
    "title" : "Rock",
    "@path" : "/vinyl/Rock"
  },
  "Disco" : {
    "title" : "Disco",
    "@path" : "/vinyl/Disco"
  },
  "title" : "Best vinyl",
  "@path" : "/vinyl"
} ]

appendFrom

Get JSON by a given Node or ContentMap and append it to a given JSON string. Further applied methods are only applied to the resultant JSON of the given node.

Method signatures

JsonBuilder from(String json, Node node)

JsonBuilder from(String json, ContentMap node)

Arguments

Argument Description

json

required

The JSON string to which the new json gets appended to.

node

required

The node you want to work with.

Example

[#assign damNode = cmsfn.contentByPath("/jolly-jumper", "dam") /]\
[#assign `[`damJson`]{style="color: rgb(0, 128, 128);"}` = jsonfn.from(damNode).down(2).add("@name").allowOnlyNodeTypes("mgnl:asset").inline().print()]\
[#assign websiteNode = cmsfn.contentByPath("/vinyl", "website") /]\
[#assign `[`allJson`]{style="color: rgb(128, 0, 128);"}` = jsonfn.`**`appendFrom`**`(`[`damJson`]{style="color: rgb(0, 128, 128);"}`, websiteNode).down(1).add("@path").allowOnlyNodeTypes("mgnl:page").inline().print() /]\
<script>\
var damJson = '${`[`damJson`]{style="color: rgb(0, 128, 128);"}`}';\
var allJson = '${`[`allJson`]{style="color: rgb(153, 51, 102);"}`}';\
</script>
<script>\
var damJson = `[`'[{"@name":"jolly-jumper-black-and-white.png"}]`]{style="color: rgb(0, 128, 128);"}`';\
var allJson = '`[`[{"@name":"jolly-jumper-black-and-white.png"},[{"@path":"/vinyl/rock"},{"@path":"/vinyl/disco"}]]`]{style="color: rgb(153, 51, 102);"}`';\
</script>

Node customizing methods

These methods impact the resulting node structure. The methods are applied on a JsonBuilder object and return a JsonBuilder.

down

Define the level of child nodes to get.

Method signatures

JsonBuilder down(int level)

Arguments

Argument Description

level

required

An integer defining the level of child nodes to get. Choose values >=1.

Example

[#assign node = cmsfn.contentByPath("/", "website") /]\
${jsonfn.from(node).add("@path").`**`down(2)`**`.allowOnlyNodeTypes("mgnl:page").print()}
[ {
  "us-comics" : {
    "@path" : "/comics/us-comics"
  },
  "belgian-comics" : {
    "@path" : "/comics/belgian-comics"
  },
  "@path" : "/comics"
}, {
  "rock" : {
    "@path" : "/vinyl/rock"
  },
  "jazz" : {
    "@path" : "/vinyl/jazz"
  },
  "disco" : {
    "@path" : "/vinyl/disco"
  },
  "@path" : "/vinyl"
} ]

allowOnlyNodeTypes

Allow only node types by a given parameter (or regular expression). The method is applied during the #print method and subnodes of excluded nodes go into the resulting JSON if not specifically excluded by the regular expression.

Method signatures

JsonBuilder allowOnlyNodeTypes(String nodeTypesRegex)

Arguments

Argument Description

nodeTypesRegex

required

A regular expression that defines the wanted node types.

Example

[#assign damNode = cmsfn.contentByPath("/comics", "dam") /]\
${jsonfn.from(damNode).down(2)`**`.allowOnlyNodeTypes("mgnl:asset")`**`.add("@nodeType", "@path").readNodeTypes("mgnl.*").print()}
[ {
  "@nodeType" : "mgnl:asset",
  "@path" : "/comics/9b6c2464fbcf7a371c573f2da26ff6f1._QL80_TTD_.jpg"
}, {
  "@nodeType" : "mgnl:asset",
  "@path" : "/comics/ultra-comics.jpg"
}, {
  "@nodeType" : "mgnl:asset",
  "@path" : "/comics/wuffle-comics-no-license-required.jpg"
}, {
  "@nodeType" : "mgnl:asset",
  "@path" : "/comics/a-woman-talking-on-a-comic-scene_1020-627.jpg"
} ]

readNodeTypes

Allow only node types by a given parameter (or regular expression). The method is applied during input phase and node types that are not defined by the regular expression will not be read. As a consequence, a node’s subnodes are also skipped, even if they would have been allowed.

Use this method to, for instance, ensure you do not read (and process) JCR history or repository permissions that are also stored in repository. The purpose of the method is to ensure that you do not waste time processing something that would be discarded anyway.

Method signatures

JsonBuilder readNodeTypes(String nodeTypesRegex)

Arguments

Argument Description

nodeTypesRegex

required

A regular expression to match the allowed node types.

Example

[#assign damNode = cmsfn.contentByPath("/comics", "dam") /]\
${jsonfn.from(damNode).down(2)`**`.readNodeTypes("mgnl:asset")`**`.add("@nodeType", "@path").readNodeTypes("mgnl.*").print()}
[source]
----

----
{
  "@nodeType" : "mgnl:folder",
  "9b6c2464fbcf7a371c573f2da26ff6f1._QL80_TTD_.jpg" : {
    "@nodeType" : "mgnl:asset",
    "jcr:content" : {
      "@nodeType" : "mgnl:resource",
      "@path" : "/comics/9b6c2464fbcf7a371c573f2da26ff6f1._QL80_TTD_.jpg/jcr:content"
    },
    "@path" : "/comics/9b6c2464fbcf7a371c573f2da26ff6f1._QL80_TTD_.jpg"
  },
  "wuffle-comics-no-license-required.jpg" : {
    "@nodeType" : "mgnl:asset",
    "jcr:content" : {
      "@nodeType" : "mgnl:resource",
      "@path" : "/comics/wuffle-comics-no-license-required.jpg/jcr:content"
    },
    "@path" : "/comics/wuffle-comics-no-license-required.jpg"
  },
  "ultra-comics.jpg" : {
    "@nodeType" : "mgnl:asset",
    "jcr:content" : {
      "@nodeType" : "mgnl:resource",
      "@path" : "/comics/ultra-comics.jpg/jcr:content"
    },
    "@path" : "/comics/ultra-comics.jpg"
  },
  "@path" : "/comics",
  "a-woman-talking-on-a-comic-scene_1020-627.jpg" : {
    "@nodeType" : "mgnl:asset",
    "jcr:content" : {
      "@nodeType" : "mgnl:resource",
      "@path" : "/comics/a-woman-talking-on-a-comic-scene_1020-627.jpg/jcr:content"
    },
    "@path" : "/comics/a-woman-talking-on-a-comic-scene_1020-627.jpg"
  }
}

childrenAsArray

Select parent nodes by a property and a value to display their children as an array. The child nodes are organized in an array (see example below).

Method signatures

JsonBuilder childrenAsArray(String propertyName, String valueRegex)

Arguments

Argument Description

propertyName

required

The name of the property used to select the parent node.

valueRegex

required

The value (or a regular expression matching the value) of the named propertyName property (first argument).

Example

[#assign damNode = cmsfn.contentByPath("/some-assets", "dam") /]\
[#assign jsbTmp = jsonfn.from(damNode).readNodeTypes("mgnl.*").down(2).add("@nodeType", "@path") /]\
${jsbTmp.print()}\
/** below the children nodes of a mgnl:folder are organized within an array **/\
${jsbTmp`**`.childrenAsArray("@nodeType", "mgnl:folder")`**`.print()}

Line 3 renders the JSON without using arrays. Line 5 renders the child nodes of nodes of the type mgnl:folder as arrays.

{
  "@nodeType" : "mgnl:folder",
  "iso-125" : {
    "@nodeType" : "mgnl:folder",
    "red.jpg" : {
      "@nodeType" : "mgnl:asset",
      "@path" : "/some-assets/iso-125/red.jpg"
    },
    "blue.jpg" : {
      "@nodeType" : "mgnl:asset",
      "@path" : "/some-assets/iso-125/blue.jpg"
    },
    "@path" : "/some-assets/iso-125"
  },
  "iso-400" : {
    "@nodeType" : "mgnl:folder",
    "kodachrome-400.jpg" : {
      "@nodeType" : "mgnl:asset",
      "@path" : "/some-assets/iso-400/kodachrome-400.jpg"
    },
    "fujifilm-400.jpg" : {
      "@nodeType" : "mgnl:asset",
      "@path" : "/some-assets/iso-400/fujifilm-400.jpg"
    },
    "@path" : "/some-assets/iso-400"
  },
  "@path" : "/some-assets"
}
/** below the children nodes of a mgnl:folder are organized within an array **/
{
  "@nodeType" : "mgnl:folder",
  "iso-125" : [ {
    "@nodeType" : "mgnl:asset",
    "jcr:content" : {
      "@nodeType" : "mgnl:resource",
      "@path" : "/some-assets/iso-125/blue.jpg/jcr:content"
    },
    "@path" : "/some-assets/iso-125/blue.jpg"
  }, {
    "@nodeType" : "mgnl:asset",
    "jcr:content" : {
      "@nodeType" : "mgnl:resource",
      "@path" : "/some-assets/iso-125/red.jpg/jcr:content"
    },
    "@path" : "/some-assets/iso-125/red.jpg"
  } ],
  "iso-400" : [ {
    "@nodeType" : "mgnl:asset",
    "jcr:content" : {
      "@nodeType" : "mgnl:resource",
      "@path" : "/some-assets/iso-400/kodachrome-400.jpg/jcr:content"
    },
    "@path" : "/some-assets/iso-400/kodachrome-400.jpg"
  }, {
    "@nodeType" : "mgnl:asset",
    "jcr:content" : {
      "@nodeType" : "mgnl:resource",
      "@path" : "/some-assets/iso-400/fujifilm-400.jpg/jcr:content"
    },
    "@path" : "/some-assets/iso-400/fujifilm-400.jpg"
  } ],
  "@path" : "/some-assets"
}

insertCustom

Replace JSON that is expected to be generated at a given path with given custom JSON.

Method signatures

JsonBuilder insertCustom(String pathSuffix, String json)

Arguments

Argument Description

pathSuffix

required

The path to the node for which you want replace JSON.

json

required

The JSON that replaces the regular JSON.[]\{style=``color: rgb(255, 0, 0);''}

Example

[#assign websiteNodes = cmsfn.contentByPath("/vinyl", "website") /]\
[#assign regularJsonObjects = jsonfn.from(websiteNodes).down(2).readNodeTypes("mgnl:page").add( "@path", "title")/]\
${regularJsonObjects.print()}\
/** **/\
${regularJsonObjects`**`.insertCustom("/vinyl/jazz",'{"bluenotes":true, "mind-blowing" : "sometimes", "max-bpm" : 145}')`**`.print()}

Line 3 renders the regular JSON. On line 5, the JSON of the node with the path /vinyl/jazz is replaced with custom JSON.

{
  "rock" : {
    "title" : "Rock",
    "@path" : "/vinyl/rock"
  },
  "jazz" : {
    "title" : "Jazz",
    "@path" : "/vinyl/jazz"
  },
  "disco" : {
    "title" : "Disco",
    "@path" : "/vinyl/disco"
  },
  "title" : "Best vinyl",
  "@path" : "/vinyl"
}
/** **/
{
  "rock" : {
    "title" : "Rock",
    "@path" : "/vinyl/rock"
  },
  "jazz" : {
    "bluenotes" : true,
    "mind-blowing" : "sometimes",
    "max-bpm" : 145
  },
  "disco" : {
    "title" : "Disco",
    "@path" : "/vinyl/disco"
  },
  "title" : "Best vinyl",
  "@path" : "/vinyl"
}

==

Property defining methods

Specify which properties of the JCR node should go into the JSON object. Combine inclusionary and exclusionary methods. The resultant set of properties is applied to all nodes, subnodes and resolved nodes, if the node has a value for the property. The methods are applied on a JsonBuilder object and return the JsonBuilder.

addAll

Add all properties.

Method signatures

JsonBuilder addAll()

Arguments

No arguments.

Example

[#assign pageNode = cmsfn.contentByPath("/vinyl", "website") /]\
${jsonfn.from(pageNode).`**`addAll()`**`.print()}
{
  "mgnl:created" : 1486441456877,
  "@link" : "/vinyl-site/",
  "mgnl:template" : "multisite-examples-lightmodule:pages/ms-page",
  "jcr:created" : 1487604125855,
  "mgnl:comment" : "",
  "@depth" : 1,
  "navigationTitle" : "Best vinyl",
  "jcr:createdBy" : "admin",
  "windowTitle" : "Best vinyl",
  "jcr:uuid" : "17ac0768-4337-4dda-a8da-223c036d299d",
  "title" : "Best vinyl",
  "mgnl:lastActivatedBy" : "superuser",
  "mgnl:lastModified" : 1490253448807,
  "@nodeType" : "mgnl:page",
  "@name" : "vinyl",
  "mgnl:lastModifiedBy" : "superuser",
  "hideInNav" : true,
  "jcr:mixinTypes" : [ "mgnl:hasVersion" ],
  "mgnl:lastActivated" : 1488435020565,
  "mgnl:activationStatus" : true,
  "mgnl:createdBy" : "superuser",
  "jcr:primaryType" : "mgnl:page",
  "@id" : "17ac0768-4337-4dda-a8da-223c036d299d",
  "@path" : "/vinyl"
}

add

Add the wanted properties. You can pass one or many arguments that can be regular expressions.

Method signatures

JsonBuilder add(String…​ property)

Arguments

Argument Description

property

required

The property to be included or a regular expression pattern to match properties.

Example

[#assign pageNode = cmsfn.contentByPath("/vinyl", "website") /]\
${jsonfn.from(pageNode).`**`add("@.*")`**`.print()}\
/** --- **/\
${jsonfn.from(pageNode)`**`.add("mgnl.*", "title")`**`.print()}
{
  "@nodeType" : "mgnl:page",
  "@name" : "vinyl",
  "@link" : "/vinyl-site/",
  "@depth" : 1,
  "@id" : "17ac0768-4337-4dda-a8da-223c036d299d",
  "@path" : "/vinyl"
}
/** --- **/
{
  "mgnl:created" : 1486441456877,
  "mgnl:template" : "multisite-examples-lightmodule:pages/ms-page",
  "mgnl:comment" : "",
  "mgnl:lastModifiedBy" : "superuser",
  "mgnl:lastActivated" : 1488435020565,
  "mgnl:activationStatus" : true,
  "mgnl:createdBy" : "superuser",
  "title" : "Best vinyl",
  "mgnl:lastActivatedBy" : "superuser",
  "mgnl:lastModified" : 1490253448807
}

exclude

Exclude unwanted properties. You can pass one or many arguments that can be regular expressions.

Method signatures

JsonBuilder exclude(String…​ property)

Arguments

Argument Description

property

required

The property to be excluded or a regular expression pattern to match properties you want to exclude.

Example

[#assign pageNode = cmsfn.contentByPath("/vinyl", "website") /]\
${jsonfn.from(pageNode).addAll()`**`.exclude("jcr.*", "mgnl.*")`**`.print()}
{
  "@nodeType" : "mgnl:page",
  "@name" : "vinyl",
  "@link" : "/vinyl-site/",
  "hideInNav" : true,
  "@depth" : 1,
  "navigationTitle" : "Best vinyl",
  "windowTitle" : "Best vinyl",
  "@id" : "17ac0768-4337-4dda-a8da-223c036d299d",
  "title" : "Best vinyl",
  "@path" : "/vinyl"
}

==

Resolving referenced nodes and renditions

Resolve referenced nodes and image renditions. The methods are applied on a JsonBuilder object and return the JsonBuilder.

expand

Resolve nodes which are referenced by a property value.

Method signatures

JsonBuilder expand(String propertyName, String repository)

JsonBuilder expand(String propertyNameRegex, String targetRepository, String targetPropertyName)

Arguments

expand(propertyName, repository)
Argument Description

propertyName

required

The name of the property which contains the reference to a node in another workspace.

repository

required

The name of the repository which contains the node to be expanded.

expand(propertyNameRegex, targetRepository, targetPropertyName)

propertyNameRegex

required

A regular expression that matches the name of the property which contains the reference to a node in another workspace.

targetRepository

required

The name of the target repository which contains the node to be expanded.

targetPropertyName

required

The name of the property of the referenced node.

Example

[#assign contentAppItemNode = cmsfn.contentByPath("/cameras/F3", "cameracollection") /]\
/** node with references to other nodes **/\
${jsonfn.from(contentAppItemNode).add("name", "maker", "categories", "images").print()}\
/** expanding the referenced categories, images and maker **/\
${jsonfn.from(contentAppItemNode).add("@link", "name")\
` **`.expand("maker", "cameracollection")`**`\
` **`.expand("categories", "category", "jcr:uuid")`**`\
` **`.expand("images", "dam")`**`\
` **`.expand("image", "dam")`**`\
.print()}

  • .expand("categor.*", "category", "jcr:uuid") could be replaced with .expand("categories", "category") in the above example.

  • when expanding a property, it is not required to add it with the #add method.

 
/** node with references to other nodes **/
{
  "images" : [ "jcr:59325c09-0966-4810-bf36-329d742201e3", "jcr:fc1b30b2-4d38-45b8-9fba-944ea6084582" ],
  "name" : "F3",
  "maker" : "893a6375-41d9-4405-ab74-ee3b91f97839",
  "categories" : [ "a9b08e78-38f0-4390-b1b7-6f71087d4514", "13e84bb3-6335-4710-92a6-a7f3b27a2e08" ]
}
/** expanding the referenced categories, images and maker **/
{
  "images" : [ {
    "@link" : "/dam/jcr:59325c09-0966-4810-bf36-329d742201e3/Nikon_F3_with_HP_viewfinder.jpeg",
    "name" : "Nikon_F3with_HP_viewfinder"
  }, {
    "@link" : "/dam/jcr:fc1b30b2-4d38-45b8-9fba-944ea6084582/Nikon_F3_used.jpg",
    "name" : "Nikon_F3_used"
  } ],
  "@link" : "/cameras/F3",
  "name" : "F3",
  "maker" : {
    "image" : {
      "@link" : "/dam/jcr:12e21c54-12fe-4cce-8e6a-021b598b187d/nikon-logo-square.jpg",
      "name" : "nikon-logo-square"
    },
    "@link" : "/makers/Nikon",
    "name" : "Nikon"
  },
  "categories" : [ {
    "@link" : "/camera-categories/format/24x36",
    "name" : "24x36"
  }, {
    "@link" : "/camera-categories/general/analog",
    "name" : "analog"
  } ]
}

Compare the first and second JSON fragments to see how some properties have been expanded to include their referenced nodes:

  • #expand can resolve a single reference from a normal field (see maker), as well as multiple nodes when the property stores multiple values from a multivalue field (see categories and images).

  • The values in categories are the standard UUID`s of the referenced nodes. The values in `images are asset IDs (AssetProvider ID and a UUID). #expand resolves all their referenced nodes correctly.

  • The expanded nodes from the property images has expanded nodes from the dam workspace, thus producing JSON from an asset. The @link property can be used to create an <img /> tag.

  • #expand can act on multiple levels:

    • .expand("maker", "cameracollection") expands a maker node which itself has the property image.

    • This is also expanded by the expression .expand("image", "dam")

  • If the nodes represent assets, you can also try to get renditions if any are defined. See method #binaryLinkRendition below.

binaryLinkRendition

Add renditions for assets. This works only if the renditions (image variations) have been defined on the current Theme.

Each rendition is added as a property of the asset. The property name for a rendition follows this pattern: @rendition_<rendition-name>. The value is a link.

If a rendition is not defined in the theme, the property is added, but the value points to the default link.

Method signature

JsonBuilder binaryLinkRendition(String…​ variation)

Arguments

Argument Description

variation

required

The image variation (rendition) name of the asset.

Example

[#assign contentAppItemNode = cmsfn.contentByPath("/comics/belgian-comics/morris/lucky-luke/jolly-jumper/main", "website") /]\
${jsonfn.from(contentAppItemNode).down(2).allowOnlyNodeTypes("mgnl.*")\
.add("@nodeType", "image", "@link")\
.expand("image", "dam")\
`**`.binaryLinkRendition("default","960","foobar")`**`\
.print()}

This example renders a component node which contains an image (which is expanded) and includes its renditions.

[ {
  "@nodeType" : "mgnl:component",
  "image" : {
    "@nodeType" : "mgnl:asset",
    "@link" : "/dam/jcr:7e0c0a03-ef6f-4beb-be50-1feb6f71a042/jolly-jumper-black-and-white.png",
    "@rendition_default" : "/.imaging/default/dam/jolly-jumper/jolly-jumper-black-and-white.png/jcr:content.png",
    "@rendition_foobar" : "/.imaging/default/dam/jolly-jumper/jolly-jumper-black-and-white.png/jcr:content.png",
    "@rendition_960" : "/.imaging/mte/comics-theme/960/dam/jolly-jumper/jolly-jumper-black-and-white.png/jcr:content/jolly-jumper-black-and-white.png"
  },
  "@link" : "/comics-site/jollyjumper/main/0.html"
} ]

Note that there is no rendition foobar defined on the theme, therefor the property @rendition_foobar points to the default rendition.

Formatting, i18n and print

inline

Get the JSON string on one line.

Method signature

JsonBuilder inline()

Arguments

none

Example

[#assign pageNode = cmsfn.contentByPath("/vinyl", "website") /]\
[#assign jsonBuilder = jsonfn.fromChildNodesOf(pageNode).readNodeTypes("mgnl:page").down(2).add("title") /]\
/** multiline **/\
${jsonBuilder.print()}\
/** single-line **/\
${jsonBuilder`**`.inline()`**`.print()}

This example renders a component node which contains an image (which gets expanded) and includes its renditions.

/** multiline **/
[ {
  "title" : "Rock"
}, {
  "title" : "Disco"
}, {
  "title" : "Jazz"
} ]
/** single-line **/
[{"title":"Rock"},{"title":"Disco"},{"title":"Jazz"}]

maskChar

Replace one char with another on property names.

Method signature

JsonBuilder maskChar(char what, char replace)

Arguments

Argument Description

what

required

The char to replace.

replace

required

The replacement char.

Example

[#assign pageNode = cmsfn.contentByPath("/comics/belgian-comics/morris/lucky-luke/jolly-jumper/in-love", "website") /]\
[#assign jsonBuilder = jsonfn.from(pageNode).add("mgnl:last.*x") /]\
${jsonfn.from(pageNode).add("mgnl:lastA.*").print()}\
/** **/\
${jsonfn.from(pageNode).add("mgnl:lastA.*")`**`.maskChar(':', '_')`**`.print()}
[source]
----

----
{
  "mgnl:lastActivated" : 1488452079969,
  "mgnl:lastActivatedBy" : "superuser"
}
/** **/
{
  "mgnl_lastActivated" : 1488452079969,
  "mgnl_lastActivatedBy" : "superuser"
}

escapeBackslash

Escapes backslashes (\) in the JSON. Use with care and only if strictly necessary. Typically backslashes are already escaped!

Method signature

JsonBuilder escapeBackslash()

Arguments

No arguments.

Example

[#assign cameraNode = cmsfn.contentByPath("/cameras/X-Pro2", "cameracollection") /]\
${jsonfn.from(cameraNode).add("description")`**`.escapeBackslash()`**`.print()}
[source]
----

----
/** not especially escaped **/
{
  "description" : "<p>/\\ /\\ The Fujifilm X-Pro2 is a ...</p>\n\n<p> </p>\n"
}
/** escaped **/
{
  "description" : "<p>/\\\\ /\\\\ The Fujifilm X-Pro2 is a ...</p>\\n\\n<p> </p>\\n"
}

The backslashes are already escaped.

wrapForI18n

Ensures that localized values are available and the values of the properties are set according to the current locale.

When the function is applied, the nodes are wrapped with info.magnolia.jcr.wrapper.I18nNodeWrapper.

Method signature

JsonBuilder wrapForI18n()

Arguments

No arguments

Example

[#assign cameraNode = cmsfn.contentByPath("/cameras/X-Pro2", "cameracollection") /]\
${jsonfn.from(cameraNode).add("description")`**`.wrapForI18n()`**`.print()}

print

The print methods returns the JSON as a string. Always call this method at the end when you want to render the JSON.

Method signature

JsonBuilder print()

Arguments

No arguments

Example

[#assign pageNode = cmsfn.contentByPath("/vinyl", "website") /]\
${jsonfn.from(pageNode).addAll().exclude("mgnl.*", "jcr.*")`**`.print()`**`}
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