friendica/php-json-ld
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Use context loader terminology.

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This commit is contained in:
Dave Longley 2013-02-18 10:51:51 -05:00
parent 5961e603aa
commit 607575d0d4
1 changed files with 45 additions and 38 deletions
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83
jsonld.php
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@ -46,7 +46,7 @@
* [strict] use strict mode (default: true).
* [optimize] true to optimize the compaction (default: false).
* [graph] true to always output a top-level graph (default: false).
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return mixed the compacted JSON-LD output.
*/
@ -61,7 +61,7 @@ function jsonld_compact($input, $ctx, $options=array()) {
* @param mixed $input the JSON-LD object to expand.
* @param assoc[$options] the options to use:
* [base] the base IRI to use.
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return array the expanded JSON-LD output.
*/
@ -78,7 +78,7 @@ function jsonld_expand($input, $options=array()) {
* null.
* @param [options] the options to use:
* [base] the base IRI to use.
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return mixed the flattened JSON-LD output.
*/
@ -98,7 +98,7 @@ function jsonld_flatten($input, $ctx, $options=array()) {
* [explicit] default @explicit flag (default: false).
* [omitDefault] default @omitDefault flag (default: false).
* [optimize] optimize when compacting (default: false).
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return stdClass the framed JSON-LD output.
*/
@ -115,7 +115,7 @@ function jsonld_frame($input, $frame, $options=array()) {
* [base] the base IRI to use.
* [format] the format if output is a string:
* 'application/nquads' for N-Quads (default).
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return array the normalized output.
*/
@ -153,7 +153,7 @@ function jsonld_from_rdf($input, $options=array()) {
* [base] the base IRI to use.
* [format] the format to use to output a string:
* 'application/nquads' for N-Quads (default).
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return array all RDF statements in the JSON-LD object.
*/
@ -179,18 +179,18 @@ $jsonld_cache = new stdClass();
/** The default active context cache. */
$jsonld_cache->activeCtx = new ActiveContextCache();
/** The default JSON-LD URL client. */
global $jsonld_default_url_client;
$jsonld_default_url_client = null;
/** The default JSON-LD context loader. */
global $jsonld_default_load_context;
$jsonld_default_load_context = null;
/**
* Sets the default JSON-LD URL client.
* Sets the default JSON-LD context loader.
*
* @param callable url_client(url) the URL client to use.
* @param callable load_context(url) the context loader.
*/
function jsonld_set_url_client($url_client) {
global $jsonld_default_url_client;
$jsonld_default_url_client = $url_client;
function jsonld_set_context_loader($load_context) {
global $jsonld_default_load_context;
$jsonld_default_load_context = $load_context;
}
/**
@ -201,9 +201,9 @@ function jsonld_set_url_client($url_client) {
* @return the JSON-LD.
*/
function jsonld_get_url($url) {
global $jsonld_default_url_client;
if($jsonld_default_url_client !== null) {
return call_user_func($jsonld_default_url_client, $url);
global $jsonld_default_load_context;
if($jsonld_default_load_context !== null) {
return call_user_func($jsonld_default_load_context, $url);
}
// default JSON-LD GET implementation
@ -497,7 +497,7 @@ class JsonLdProcessor {
* [skipExpansion] true to assume the input is expanded and skip
* expansion, false not to, defaults to false.
* [activeCtx] true to also return the active context used.
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return mixed the compacted JSON-LD output.
*/
@ -516,7 +516,8 @@ class JsonLdProcessor {
isset($options['graph']) or $options['graph'] = false;
isset($options['skipExpansion']) or $options['skipExpansion'] = false;
isset($options['activeCtx']) or $options['activeCtx'] = false;
isset($options['urlClient']) or $options['urlClient'] = 'jsonld_get_url';
isset($options['loadContext']) or $options['loadContext'] =
'jsonld_get_url';
if($options['skipExpansion'] === true) {
$expanded = $input;
@ -627,7 +628,7 @@ class JsonLdProcessor {
* defaults to true.
* [keepFreeFloatingNodes] true to keep free-floating nodes,
* false not to, defaults to false.
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return array the expanded JSON-LD output.
*/
@ -638,13 +639,14 @@ class JsonLdProcessor {
true;
isset($options['keepFreeFloatingNodes']) or
$options['keepFreeFloatingNodes'] = false;
isset($options['urlClient']) or $options['urlClient'] = 'jsonld_get_url';
isset($options['loadContext']) or $options['loadContext'] =
'jsonld_get_url';
// retrieve all @context URLs in the input
$input = self::copy($input);
try {
$this->_retrieveContextUrls(
$input, new stdClass(), $options['urlClient'], $options['base']);
$input, new stdClass(), $options['loadContext'], $options['base']);
}
catch(Exception $e) {
throw new JsonLdException(
@ -675,14 +677,15 @@ class JsonLdProcessor {
* @param ctx the context to use to compact the flattened output, or null.
* @param assoc $options the options to use:
* [base] the base IRI to use.
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return array the flattened output.
*/
public function flatten($input, $ctx, $options) {
// set default options
isset($options['base']) or $options['base'] = '';
isset($options['urlClient']) or $options['urlClient'] = 'jsonld_get_url';
isset($options['loadContext']) or $options['loadContext'] =
'jsonld_get_url';
try {
// expand input
@ -727,7 +730,7 @@ class JsonLdProcessor {
* [explicit] default @explicit flag (default: false).
* [omitDefault] default @omitDefault flag (default: false).
* [optimize] optimize when compacting (default: false).
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return stdClass the framed JSON-LD output.
*/
@ -738,7 +741,8 @@ class JsonLdProcessor {
isset($options['explicit']) or $options['explicit'] = false;
isset($options['omitDefault']) or $options['omitDefault'] = false;
isset($options['optimize']) or $options['optimize'] = false;
isset($options['urlClient']) or $options['urlClient'] = 'jsonld_get_url';
isset($options['loadContext']) or $options['loadContext'] =
'jsonld_get_url';
// preserve frame context
$ctx = (property_exists($frame, '@context') ?
@ -799,14 +803,15 @@ class JsonLdProcessor {
* @param mixed $input the JSON-LD object to normalize.
* @param assoc $options the options to use:
* [base] the base IRI to use.
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return array the JSON-LD normalized output.
*/
public function normalize($input, $options) {
// set default options
isset($options['base']) or $options['base'] = '';
isset($options['urlClient']) or $options['urlClient'] = 'jsonld_get_url';
isset($options['loadContext']) or $options['loadContext'] =
'jsonld_get_url';
try {
// expand input then do normalization
@ -877,14 +882,15 @@ class JsonLdProcessor {
* [base] the base IRI to use.
* [format] the format to use to output a string:
* 'application/nquads' for N-Quads (default).
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return array all RDF statements in the JSON-LD object.
*/
public function toRDF($input, $options) {
// set default options
isset($options['base']) or $options['base'] = '';
isset($options['urlClient']) or $options['urlClient'] = 'jsonld_get_url';
isset($options['loadContext']) or $options['loadContext'] =
'jsonld_get_url';
try {
// expand input
@ -932,7 +938,7 @@ class JsonLdProcessor {
* @param assoc $options the options to use:
* [renameBlankNodes] true to rename blank nodes, false not to,
* defaults to true.
* [urlClient(url)] the URL client to use.
* [loadContext(url)] the context loader.
*
* @return stdClass the new active context.
*/
@ -941,7 +947,8 @@ class JsonLdProcessor {
isset($options['base']) or $options['base'] = '';
isset($options['renameBlankNodes']) or $options['renameBlankNodes'] =
true;
isset($options['urlClient']) or $options['urlClient'] = 'jsonld_get_url';
isset($options['loadContext']) or $options['loadContext'] =
'jsonld_get_url';
// return initial context early for null context
if($local_ctx === null) {
@ -955,7 +962,7 @@ class JsonLdProcessor {
}
try {
$this->_retrieveContextUrls(
$ctx, new stdClass(), $options['urlClient'], $options['base']);
$ctx, new stdClass(), $options['loadContext'], $options['base']);
}
catch(Exception $e) {
throw new JsonLdException(
@ -4558,19 +4565,19 @@ class JsonLdProcessor {
}
/**
* Retrieves external @context URLs using the given URL client. Each
* Retrieves external @context URLs using the given context loader. Each
* instance of @context in the input that refers to a URL will be replaced
* with the JSON @context found at that URL.
*
* @param mixed $input the JSON-LD input with possible contexts.
* @param stdClass $cycles an object for tracking context cycles.
* @param callable $url_client(url) the URL client.
* @param callable $load_context(url) the context loader.
* @param base $base the base URL to resolve relative URLs against.
*
* @return mixed the result.
*/
protected function _retrieveContextUrls(
&$input, $cycles, $url_client, $base='') {
&$input, $cycles, $load_context, $base='') {
if(count(get_object_vars($cycles)) > self::MAX_CONTEXT_URLS) {
throw new JsonLdException(
'Maximum number of @context URLs exceeded.',
@ -4603,7 +4610,7 @@ class JsonLdProcessor {
$_cycles->{$url} = true;
// retrieve URL
$ctx = $url_client($url);
$ctx = $load_context($url);
// parse string context as JSON
if(is_string($ctx)) {
@ -4648,7 +4655,7 @@ class JsonLdProcessor {
}
// recurse
$this->_retrieveContextUrls($ctx, $_cycles, $url_client, $url);
$this->_retrieveContextUrls($ctx, $_cycles, $load_context, $url);
$urls->{$url} = $ctx->{'@context'};
}