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Diffstat (limited to 'vendors/uploadify/com/adobe/serialization/json/JSONDecoder.as')
| -rw-r--r-- | vendors/uploadify/com/adobe/serialization/json/JSONDecoder.as | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/vendors/uploadify/com/adobe/serialization/json/JSONDecoder.as b/vendors/uploadify/com/adobe/serialization/json/JSONDecoder.as new file mode 100644 index 000000000..82ade196a --- /dev/null +++ b/vendors/uploadify/com/adobe/serialization/json/JSONDecoder.as @@ -0,0 +1,221 @@ +/*
+ Copyright (c) 2008, Adobe Systems Incorporated
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ * Neither the name of Adobe Systems Incorporated nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package com.adobe.serialization.json {
+
+ public class JSONDecoder {
+
+ /** The value that will get parsed from the JSON string */
+ private var value:*;
+
+ /** The tokenizer designated to read the JSON string */
+ private var tokenizer:JSONTokenizer;
+
+ /** The current token from the tokenizer */
+ private var token:JSONToken;
+
+ /**
+ * Constructs a new JSONDecoder to parse a JSON string
+ * into a native object.
+ *
+ * @param s The JSON string to be converted
+ * into a native object
+ * @langversion ActionScript 3.0
+ * @playerversion Flash 9.0
+ * @tiptext
+ */
+ public function JSONDecoder( s:String ) {
+
+ tokenizer = new JSONTokenizer( s );
+
+ nextToken();
+ value = parseValue();
+ }
+
+ /**
+ * Gets the internal object that was created by parsing
+ * the JSON string passed to the constructor.
+ *
+ * @return The internal object representation of the JSON
+ * string that was passed to the constructor
+ * @langversion ActionScript 3.0
+ * @playerversion Flash 9.0
+ * @tiptext
+ */
+ public function getValue():* {
+ return value;
+ }
+
+ /**
+ * Returns the next token from the tokenzier reading
+ * the JSON string
+ */
+ private function nextToken():JSONToken {
+ return token = tokenizer.getNextToken();
+ }
+
+ /**
+ * Attempt to parse an array
+ */
+ private function parseArray():Array {
+ // create an array internally that we're going to attempt
+ // to parse from the tokenizer
+ var a:Array = new Array();
+
+ // grab the next token from the tokenizer to move
+ // past the opening [
+ nextToken();
+
+ // check to see if we have an empty array
+ if ( token.type == JSONTokenType.RIGHT_BRACKET ) {
+ // we're done reading the array, so return it
+ return a;
+ }
+
+ // deal with elements of the array, and use an "infinite"
+ // loop because we could have any amount of elements
+ while ( true ) {
+ // read in the value and add it to the array
+ a.push ( parseValue() );
+
+ // after the value there should be a ] or a ,
+ nextToken();
+
+ if ( token.type == JSONTokenType.RIGHT_BRACKET ) {
+ // we're done reading the array, so return it
+ return a;
+ } else if ( token.type == JSONTokenType.COMMA ) {
+ // move past the comma and read another value
+ nextToken();
+ } else {
+ tokenizer.parseError( "Expecting ] or , but found " + token.value );
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Attempt to parse an object
+ */
+ private function parseObject():Object {
+ // create the object internally that we're going to
+ // attempt to parse from the tokenizer
+ var o:Object = new Object();
+
+ // store the string part of an object member so
+ // that we can assign it a value in the object
+ var key:String
+
+ // grab the next token from the tokenizer
+ nextToken();
+
+ // check to see if we have an empty object
+ if ( token.type == JSONTokenType.RIGHT_BRACE ) {
+ // we're done reading the object, so return it
+ return o;
+ }
+
+ // deal with members of the object, and use an "infinite"
+ // loop because we could have any amount of members
+ while ( true ) {
+
+ if ( token.type == JSONTokenType.STRING ) {
+ // the string value we read is the key for the object
+ key = String( token.value );
+
+ // move past the string to see what's next
+ nextToken();
+
+ // after the string there should be a :
+ if ( token.type == JSONTokenType.COLON ) {
+
+ // move past the : and read/assign a value for the key
+ nextToken();
+ o[key] = parseValue();
+
+ // move past the value to see what's next
+ nextToken();
+
+ // after the value there's either a } or a ,
+ if ( token.type == JSONTokenType.RIGHT_BRACE ) {
+ // // we're done reading the object, so return it
+ return o;
+
+ } else if ( token.type == JSONTokenType.COMMA ) {
+ // skip past the comma and read another member
+ nextToken();
+ } else {
+ tokenizer.parseError( "Expecting } or , but found " + token.value );
+ }
+ } else {
+ tokenizer.parseError( "Expecting : but found " + token.value );
+ }
+ } else {
+ tokenizer.parseError( "Expecting string but found " + token.value );
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Attempt to parse a value
+ */
+ private function parseValue():Object
+ {
+ // Catch errors when the input stream ends abruptly
+ if ( token == null )
+ {
+ tokenizer.parseError( "Unexpected end of input" );
+ }
+
+ switch ( token.type ) {
+ case JSONTokenType.LEFT_BRACE:
+ return parseObject();
+
+ case JSONTokenType.LEFT_BRACKET:
+ return parseArray();
+
+ case JSONTokenType.STRING:
+ case JSONTokenType.NUMBER:
+ case JSONTokenType.TRUE:
+ case JSONTokenType.FALSE:
+ case JSONTokenType.NULL:
+ return token.value;
+
+ default:
+ tokenizer.parseError( "Unexpected " + token.value );
+
+ }
+ return null;
+ }
+ }
+}
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