* Setting this access condition modifies the request to include the HTTP * If-Match conditional header. If this access condition is set, the * operation is performed only if the ETag of the resource matches the specified * ETag. *

* For more information, see * * Specifying Conditional Headers for Blob Service Operations. * * @param string $etag a string that represents the ETag value to check. * * @return \WindowsAzure\Blob\Models\AccessCondition */ public static function ifMatch($etag) { return new AccessCondition(Resources::IF_MATCH, $etag); } /** * Returns an access condition such that an operation will be performed only if * the resource has been modified since the specified time. *

* Setting this access condition modifies the request to include the HTTP * If-Modified-Since conditional header. If this access condition is set, * the operation is performed only if the resource has been modified since the * specified time. *

* For more information, see * * Specifying Conditional Headers for Blob Service Operations. * * @param \DateTime $lastModified date that represents the last-modified * time to check for the resource. * * @return \WindowsAzure\Blob\Models\AccessCondition */ public static function ifModifiedSince($lastModified) { Validate::isDate($lastModified); return new AccessCondition( Resources::IF_MODIFIED_SINCE, $lastModified ); } /** * Returns an access condition such that an operation will be performed only if * the resource's ETag value does not match the specified ETag value. *

* Setting this access condition modifies the request to include the HTTP * If-None-Match conditional header. If this access condition is set, the * operation is performed only if the ETag of the resource does not match the * specified ETag. *

* For more information, * see * Specifying Conditional Headers for Blob Service Operations. * * @param string $etag string that represents the ETag value to check. * * @return \WindowsAzure\Blob\Models\AccessCondition */ public static function ifNoneMatch($etag) { return new AccessCondition(Resources::IF_NONE_MATCH, $etag); } /** * Returns an access condition such that an operation will be performed only if * the resource has not been modified since the specified time. *

* Setting this access condition modifies the request to include the HTTP * If-Unmodified-Since conditional header. If this access condition is * set, the operation is performed only if the resource has not been modified * since the specified time. *

* For more information, see * * Specifying Conditional Headers for Blob Service Operations. * * @param \DateTime $lastModified date that represents the last-modified * time to check for the resource. * * @return \WindowsAzure\Blob\Models\AccessCondition */ public static function ifNotModifiedSince($lastModified) { Validate::isDate($lastModified); return new AccessCondition( Resources::IF_UNMODIFIED_SINCE, $lastModified ); } /** * Sets header type * * @param string $headerType can be one of Resources * * @return none. */ public function setHeader($headerType) { $valid = AccessCondition::isValid($headerType); Validate::isTrue($valid, Resources::INVALID_HT_MSG); $this->_header = $headerType; } /** * Gets header type * * @return string. */ public function getHeader() { return $this->_header; } /** * Sets the header value * * @param string $value the value to use * * @return none */ public function setValue($value) { $this->_value = $value; } /** * Gets the header value * * @return string */ public function getValue() { return $this->_value; } /** * Check if the $headerType belongs to valid header types * * @param string $headerType candidate header type * * @return boolean */ public static function isValid($headerType) { if ( $headerType == Resources::EMPTY_STRING || $headerType == Resources::IF_UNMODIFIED_SINCE || $headerType == Resources::IF_MATCH || $headerType == Resources::IF_MODIFIED_SINCE || $headerType == Resources::IF_NONE_MATCH ) { return true; } else { return false; } } }