Some code clean up/reorganization.

This commit is contained in:
Dave Longley 2012-04-24 20:29:40 -04:00
parent 265689c92f
commit ae46860dab

View file

@ -208,7 +208,7 @@ class JsonLdProcessor {
// remove empty contexts
$tmp = $ctx;
$ctx = array();
foreach($tmp as $i => $v) {
foreach($tmp as $v) {
if(!is_object($v) || count(get_object_vars($v)) > 0) {
$ctx[] = $v;
}
@ -436,7 +436,7 @@ class JsonLdProcessor {
// FIXME: implement jsonld_resolve_url
isset($options['resolver']) or $options['resolver'] = 'jsonld_resolve_url';
// resolve URLs in localCtx
// resolve URLs in local_ctx
$local_ctx = self::copy($local_ctx);
if(is_object($local_ctx) && !property_exists($local_ctx, '@context')) {
$local_ctx = (object)array('@context' => $local_ctx);
@ -744,13 +744,10 @@ class JsonLdProcessor {
*
* @param mixed $value the value.
*
* @return an array.
* @return array an array.
*/
public static function arrayify($value) {
if(is_array($value)) {
return $value;
}
return array($value);
return is_array($value) ? $value : array($value);
}
/**
@ -967,161 +964,162 @@ class JsonLdProcessor {
return $rval;
}
// recursively expand object
if(is_object($element)) {
// if element has a context, process it
if(property_exists($element, '@context')) {
$ctx = $this->_processContext($ctx, $element->{'@context'}, $options);
unset($element->{'@context'});
}
$rval = new stdClass();
foreach($element as $key => $value) {
// expand property
$prop = $this->_expandTerm($ctx, $key);
// drop non-absolute IRI keys that aren't keywords
if(!self::_isAbsoluteIri($prop) && !self::_isKeyword($prop, $ctx)) {
continue;
}
// if value is null and property is not @value, continue
$value = $element->{$key};
if($value === null && $prop !== '@value') {
continue;
}
// syntax error if @id is not a string
if($prop === '@id' && !is_string($value)) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@id" value must a string.',
'jsonld.SyntaxError', array('value' => $value));
}
// @type must be a string, array of strings, or an empty JSON object
if($prop === '@type' &&
!(is_string($value) || self::_isArrayOfStrings($value) ||
self::_isEmptyObject($value))) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@type" value must a string, an array ' +
'of strings, or an empty object.',
'jsonld.SyntaxError', array('value' => $value));
}
// @graph must be an array or an object
if($prop === '@graph' && !(is_object($value) || is_array($value))) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@value" value must not be an ' +
'object or an array.',
'jsonld.SyntaxError', array('value' => $value));
}
// @value must not be an object or an array
if($prop === '@value' && (is_object($value) || is_array($value))) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@value" value must not be an ' +
'object or an array.',
'jsonld.SyntaxError', array('value' => $value));
}
// @language must be a string
if($prop === '@language' && !is_string($value)) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@language" value must not be a string.',
'jsonld.SyntaxError', array('value' => $value));
}
// recurse into @list, @set, or @graph, keeping the active property
$isList = ($prop === '@list');
if($isList || $prop === '@set' || $prop === '@graph') {
$value = $this->_expand($ctx, $property, $value, $options, $isList);
if($isList && self::_isListValue($value)) {
throw new JsonLdException(
'Invalid JSON-LD syntax; lists of lists are not permitted.',
'jsonld.SyntaxError');
}
}
else {
// update active property and recursively expand value
$property = $key;
$value = $this->_expand($ctx, $property, $value, $options, false);
}
// drop null values if property is not @value (dropped below)
if($value !== null || $prop === '@value') {
// convert value to @list if container specifies it
if($prop !== '@list' && !self::_isListValue($value)) {
$container = self::getContextValue($ctx, $property, '@container');
if($container === '@list') {
// ensure value is an array
$value = (object)array('@list' => self::arrayify($value));
}
}
// add value, use an array if not @id, @type, @value, or @language
$useArray = !($prop === '@id' || $prop === '@type' ||
$prop === '@value' || $prop === '@language');
self::addValue($rval, $prop, $value, $useArray);
}
}
// get property count on expanded output
$count = count(get_object_vars($rval));
// @value must only have @language or @type
if(property_exists($rval, '@value')) {
if(($count === 2 && !property_exists($rval, '@type') &&
!property_exists($rval, '@language')) ||
$count > 2) {
throw new JsonLdException(
'Invalid JSON-LD syntax; an element containing "@value" must have ' +
'at most one other property which can be "@type" or "@language".',
'jsonld.SyntaxError', array('element' => $rval));
}
// value @type must be a string
if(property_exists($rval, '@type') && !is_string($rval->{'@type'})) {
throw new JsonLdException(
'Invalid JSON-LD syntax; the "@type" value of an element ' +
'containing "@value" must be a string.',
'jsonld.SyntaxError', array('element' => $rval));
}
// return only the value of @value if there is no @type or @language
else if($count === 1) {
$rval = $rval->{'@value'};
}
// drop null @values
else if($rval->{'@value'} === null) {
$rval = null;
}
}
// convert @type to an array
else if(property_exists($rval, '@type') && !is_array($rval->{'@type'})) {
$rval->{'@type'} = array($rval->{'@type'});
}
// handle @set and @list
else if(property_exists($rval, '@set') ||
property_exists($rval, '@list')) {
if($count !== 1) {
throw new JsonLdException(
'Invalid JSON-LD syntax; if an element has the property "@set" ' +
'or "@list", then it must be its only property.',
'jsonld.SyntaxError', array('element' => $rval));
}
// optimize away @set
if(property_exists($rval, '@set')) {
$rval = $rval->{'@set'};
}
}
// drop objects with only @language
else if(property_exists($rval, '@language') && $count === 1) {
$rval = null;
}
return $rval;
// expand non-object element according to value expansion rules
if(!is_object($element)) {
return $this->_expandValue($ctx, $property, $element, $options['base']);
}
// expand element according to value expansion rules
return $this->_expandValue($ctx, $property, $element, $options['base']);
// Note: element must be an object, recursively expand it
// if element has a context, process it
if(property_exists($element, '@context')) {
$ctx = $this->_processContext($ctx, $element->{'@context'}, $options);
unset($element->{'@context'});
}
$rval = new stdClass();
foreach($element as $key => $value) {
// expand property
$prop = $this->_expandTerm($ctx, $key);
// drop non-absolute IRI keys that aren't keywords
if(!self::_isAbsoluteIri($prop) && !self::_isKeyword($prop, $ctx)) {
continue;
}
// if value is null and property is not @value, continue
$value = $element->{$key};
if($value === null && $prop !== '@value') {
continue;
}
// syntax error if @id is not a string
if($prop === '@id' && !is_string($value)) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@id" value must a string.',
'jsonld.SyntaxError', array('value' => $value));
}
// @type must be a string, array of strings, or an empty JSON object
if($prop === '@type' &&
!(is_string($value) || self::_isArrayOfStrings($value) ||
self::_isEmptyObject($value))) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@type" value must a string, an array ' +
'of strings, or an empty object.',
'jsonld.SyntaxError', array('value' => $value));
}
// @graph must be an array or an object
if($prop === '@graph' && !(is_object($value) || is_array($value))) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@value" value must not be an ' +
'object or an array.',
'jsonld.SyntaxError', array('value' => $value));
}
// @value must not be an object or an array
if($prop === '@value' && (is_object($value) || is_array($value))) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@value" value must not be an ' +
'object or an array.',
'jsonld.SyntaxError', array('value' => $value));
}
// @language must be a string
if($prop === '@language' && !is_string($value)) {
throw new JsonLdException(
'Invalid JSON-LD syntax; "@language" value must not be a string.',
'jsonld.SyntaxError', array('value' => $value));
}
// recurse into @list, @set, or @graph, keeping the active property
$isList = ($prop === '@list');
if($isList || $prop === '@set' || $prop === '@graph') {
$value = $this->_expand($ctx, $property, $value, $options, $isList);
if($isList && self::_isListValue($value)) {
throw new JsonLdException(
'Invalid JSON-LD syntax; lists of lists are not permitted.',
'jsonld.SyntaxError');
}
}
else {
// update active property and recursively expand value
$property = $key;
$value = $this->_expand($ctx, $property, $value, $options, false);
}
// drop null values if property is not @value (dropped below)
if($value !== null || $prop === '@value') {
// convert value to @list if container specifies it
if($prop !== '@list' && !self::_isListValue($value)) {
$container = self::getContextValue($ctx, $property, '@container');
if($container === '@list') {
// ensure value is an array
$value = (object)array('@list' => self::arrayify($value));
}
}
// add value, use an array if not @id, @type, @value, or @language
$useArray = !($prop === '@id' || $prop === '@type' ||
$prop === '@value' || $prop === '@language');
self::addValue($rval, $prop, $value, $useArray);
}
}
// get property count on expanded output
$count = count(get_object_vars($rval));
// @value must only have @language or @type
if(property_exists($rval, '@value')) {
if(($count === 2 && !property_exists($rval, '@type') &&
!property_exists($rval, '@language')) ||
$count > 2) {
throw new JsonLdException(
'Invalid JSON-LD syntax; an element containing "@value" must have ' +
'at most one other property which can be "@type" or "@language".',
'jsonld.SyntaxError', array('element' => $rval));
}
// value @type must be a string
if(property_exists($rval, '@type') && !is_string($rval->{'@type'})) {
throw new JsonLdException(
'Invalid JSON-LD syntax; the "@type" value of an element ' +
'containing "@value" must be a string.',
'jsonld.SyntaxError', array('element' => $rval));
}
// return only the value of @value if there is no @type or @language
else if($count === 1) {
$rval = $rval->{'@value'};
}
// drop null @values
else if($rval->{'@value'} === null) {
$rval = null;
}
}
// convert @type to an array
else if(property_exists($rval, '@type') && !is_array($rval->{'@type'})) {
$rval->{'@type'} = array($rval->{'@type'});
}
// handle @set and @list
else if(property_exists($rval, '@set') ||
property_exists($rval, '@list')) {
if($count !== 1) {
throw new JsonLdException(
'Invalid JSON-LD syntax; if an element has the property "@set" ' +
'or "@list", then it must be its only property.',
'jsonld.SyntaxError', array('element' => $rval));
}
// optimize away @set
if(property_exists($rval, '@set')) {
$rval = $rval->{'@set'};
}
}
// drop objects with only @language
else if(property_exists($rval, '@language') && $count === 1) {
$rval = null;
}
return $rval;
}
/**