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RXMLElement.m
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RXMLElement.m
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// ================================================================================================
// RXMLElement.m
// Fast processing of XML files
//
// ================================================================================================
// Created by John Blanco on 9/23/11.
// Version 1.4
//
// Copyright (c) 2011 John Blanco
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// ================================================================================================
//
#import "RXMLElement.h"
@implementation RXMLDocHolder
- (id)initWithDocPtr:(xmlDocPtr)doc {
if ((self = [super init])) {
doc_ = doc;
}
return self;
}
- (void)dealloc {
if (doc_ != nil) {
xmlFreeDoc(doc_);
}
}
- (xmlDocPtr)doc {
return doc_;
}
@end
@implementation RXMLElement
- (id)initFromXMLString:(NSString *)xmlString encoding:(NSStringEncoding)encoding {
return [self initFromXMLData:[xmlString dataUsingEncoding:encoding]];
}
- (id)initFromXMLFilePath:(NSString *)fullPath {
return [self initFromXMLData:[NSData dataWithContentsOfFile:fullPath]];
}
- (id)initFromXMLFile:(NSString *)filename {
NSString *fullPath = [[[NSBundle bundleForClass:self.class] bundlePath] stringByAppendingPathComponent:filename];
return [self initFromXMLFilePath:fullPath];
}
- (id)initFromXMLFile:(NSString *)filename fileExtension:(NSString *)extension {
NSString *fullPath = [[NSBundle bundleForClass:[self class]] pathForResource:filename ofType:extension];
return [self initFromXMLData:[NSData dataWithContentsOfFile:fullPath]];
}
- (id)initFromURL:(NSURL *)url {
return [self initFromXMLData:[NSData dataWithContentsOfURL:url]];
}
- (id)initFromXMLData:(NSData *)data {
if ((self = [super init])) {
xmlDocPtr doc = xmlReadMemory([data bytes], (int)[data length], "", nil, XML_PARSE_RECOVER);
self.xmlDoc = [[RXMLDocHolder alloc] initWithDocPtr:doc];
if ([self isValid]) {
node_ = xmlDocGetRootElement(doc);
if (!node_) {
self.xmlDoc = nil;
}
}
}
return self;
}
- (id)initFromXMLDoc:(RXMLDocHolder *)doc node:(xmlNodePtr)node {
if ((self = [super init])) {
self.xmlDoc = doc;
node_ = node;
}
return self;
}
// Copy the RaptureXML element
// (calling copy will call this method automatically with the default zone)
-(id)copyWithZone:(NSZone *)zone{
RXMLElement* new_element = [[RXMLElement alloc] init];
new_element->node_ = node_;
new_element.xmlDoc = self.xmlDoc;
return new_element;
}
+ (id)elementFromXMLString:(NSString *)attributeXML_ encoding:(NSStringEncoding)encoding {
return [[RXMLElement alloc] initFromXMLString:attributeXML_ encoding:encoding];
}
+ (id)elementFromXMLFile:(NSString *)filename {
return [[RXMLElement alloc] initFromXMLFile:filename];
}
+ (id)elementFromXMLFilename:(NSString *)filename fileExtension:(NSString *)extension {
return [[RXMLElement alloc] initFromXMLFile:filename fileExtension:extension];
}
+ (id)elementFromURL:(NSURL *)url {
return [[RXMLElement alloc] initFromURL:url];
}
+ (id)elementFromXMLData:(NSData *)data {
return [[RXMLElement alloc] initFromXMLData:data];
}
+ (id)elementFromXMLDoc:(RXMLDocHolder *)doc node:(xmlNodePtr)node {
return [[RXMLElement alloc] initFromXMLDoc:doc node:node];
}
- (NSString *)description {
return [self text];
}
#pragma mark -
- (NSString *)tag {
return [NSString stringWithUTF8String:(const char *)node_->name];
}
- (NSString *)text {
xmlChar *key = xmlNodeGetContent(node_);
NSString *text = (key ? [NSString stringWithUTF8String:(const char *)key] : @"");
xmlFree(key);
return text;
}
- (NSInteger)textAsInt {
return [self.text intValue];
}
- (double)textAsDouble {
return [self.text doubleValue];
}
- (NSString *)attribute:(NSString *)attName {
NSString *ret = nil;
const unsigned char *attCStr = xmlGetProp(node_, (const xmlChar *)[attName cStringUsingEncoding:NSUTF8StringEncoding]);
if (attCStr) {
ret = [NSString stringWithUTF8String:(const char *)attCStr];
xmlFree((void *)attCStr);
}
return ret;
}
- (NSString *)attribute:(NSString *)attName inNamespace:(NSString *)ns {
const unsigned char *attCStr = xmlGetNsProp(node_, (const xmlChar *)[attName cStringUsingEncoding:NSUTF8StringEncoding], (const xmlChar *)[ns cStringUsingEncoding:NSUTF8StringEncoding]);
if (attCStr) {
return [NSString stringWithUTF8String:(const char *)attCStr];
}
return nil;
}
- (NSArray *)attributeNames {
NSMutableArray *names = [[NSMutableArray alloc] init];
for(xmlAttrPtr attr = node_->properties; attr != nil; attr = attr->next) {
[names addObject:[[NSString alloc] initWithCString:(const char *)attr->name encoding:NSUTF8StringEncoding]];
}
return names;
}
- (NSInteger)attributeAsInt:(NSString *)attName {
return [[self attribute:attName] intValue];
}
- (NSInteger)attributeAsInt:(NSString *)attName inNamespace:(NSString *)ns {
return [[self attribute:attName inNamespace:ns] intValue];
}
- (double)attributeAsDouble:(NSString *)attName {
return [[self attribute:attName] doubleValue];
}
- (double)attributeAsDouble:(NSString *)attName inNamespace:(NSString *)ns {
return [[self attribute:attName inNamespace:ns] doubleValue];
}
- (BOOL)isValid {
return (self.xmlDoc != nil);
}
#pragma mark -
- (RXMLElement *)child:(NSString *)tag {
NSArray *components = [tag componentsSeparatedByString:@"."];
xmlNodePtr cur = node_;
// navigate down
for (NSString *itag in components) {
const xmlChar *tagC = (const xmlChar *)[itag cStringUsingEncoding:NSUTF8StringEncoding];
if ([itag isEqualToString:@"*"]) {
cur = cur->children;
while (cur != nil && cur->type != XML_ELEMENT_NODE) {
cur = cur->next;
}
} else {
cur = cur->children;
while (cur != nil) {
if (cur->type == XML_ELEMENT_NODE && !xmlStrcmp(cur->name, tagC)) {
break;
}
cur = cur->next;
}
}
if (!cur) {
break;
}
}
if (cur) {
return [RXMLElement elementFromXMLDoc:self.xmlDoc node:cur];
}
return nil;
}
- (RXMLElement *)child:(NSString *)tag inNamespace:(NSString *)ns {
NSArray *components = [tag componentsSeparatedByString:@"."];
xmlNodePtr cur = node_;
const xmlChar *namespaceC = (const xmlChar *)[ns cStringUsingEncoding:NSUTF8StringEncoding];
// navigate down
for (NSString *itag in components) {
const xmlChar *tagC = (const xmlChar *)[itag cStringUsingEncoding:NSUTF8StringEncoding];
if ([itag isEqualToString:@"*"]) {
cur = cur->children;
while (cur != nil && cur->type != XML_ELEMENT_NODE && !xmlStrcmp(cur->ns->href, namespaceC)) {
cur = cur->next;
}
} else {
cur = cur->children;
while (cur != nil) {
if (cur->type == XML_ELEMENT_NODE && !xmlStrcmp(cur->name, tagC) && !xmlStrcmp(cur->ns->href, namespaceC)) {
break;
}
cur = cur->next;
}
}
if (!cur) {
break;
}
}
if (cur) {
return [RXMLElement elementFromXMLDoc:self.xmlDoc node:cur];
}
return nil;
}
- (NSArray *)children:(NSString *)tag {
const xmlChar *tagC = (const xmlChar *)[tag cStringUsingEncoding:NSUTF8StringEncoding];
NSMutableArray *children = [NSMutableArray array];
xmlNodePtr cur = node_->children;
while (cur != nil) {
if (cur->type == XML_ELEMENT_NODE && !xmlStrcmp(cur->name, tagC)) {
[children addObject:[RXMLElement elementFromXMLDoc:self.xmlDoc node:cur]];
}
cur = cur->next;
}
return [children copy];
}
- (NSArray *)children:(NSString *)tag inNamespace:(NSString *)ns {
const xmlChar *tagC = (const xmlChar *)[tag cStringUsingEncoding:NSUTF8StringEncoding];
const xmlChar *namespaceC = (const xmlChar *)[ns cStringUsingEncoding:NSUTF8StringEncoding];
NSMutableArray *children = [NSMutableArray array];
xmlNodePtr cur = node_->children;
while (cur != nil) {
if (cur->type == XML_ELEMENT_NODE && !xmlStrcmp(cur->name, tagC) && !xmlStrcmp(cur->ns->href, namespaceC)) {
[children addObject:[RXMLElement elementFromXMLDoc:self.xmlDoc node:cur]];
}
cur = cur->next;
}
return [children copy];
}
- (NSArray *)childrenWithRootXPath:(NSString *)xpath {
// check for a query
if (!xpath) {
return [NSArray array];
}
xmlXPathContextPtr context = xmlXPathNewContext([self.xmlDoc doc]);
if (context == NULL) {
return nil;
}
xmlXPathObjectPtr object = xmlXPathEvalExpression((xmlChar *)[xpath cStringUsingEncoding:NSUTF8StringEncoding], context);
if(object == NULL) {
return nil;
}
xmlNodeSetPtr nodes = object->nodesetval;
if (nodes == NULL) {
return nil;
}
NSMutableArray *resultNodes = [NSMutableArray array];
for (NSInteger i = 0; i < nodes->nodeNr; i++) {
RXMLElement *element = [RXMLElement elementFromXMLDoc:self.xmlDoc node:nodes->nodeTab[i]];
if (element != NULL) {
[resultNodes addObject:element];
}
}
xmlXPathFreeObject(object);
xmlXPathFreeContext(context);
return resultNodes;
}
#pragma mark -
- (void)iterate:(NSString *)query usingBlock:(void (^)(RXMLElement *))blk {
// check for a query
if (!query) {
return;
}
NSArray *components = [query componentsSeparatedByString:@"."];
xmlNodePtr cur = node_;
// navigate down
for (NSInteger i=0; i < components.count; ++i) {
NSString *iTagName = [components objectAtIndex:i];
if ([iTagName isEqualToString:@"*"]) {
cur = cur->children;
// different behavior depending on if this is the end of the query or midstream
if (i < (components.count - 1)) {
// midstream
do {
if (cur->type == XML_ELEMENT_NODE) {
RXMLElement *element = [RXMLElement elementFromXMLDoc:self.xmlDoc node:cur];
NSString *restOfQuery = [[components subarrayWithRange:NSMakeRange(i + 1, components.count - i - 1)] componentsJoinedByString:@"."];
[element iterate:restOfQuery usingBlock:blk];
}
cur = cur->next;
} while (cur != nil);
}
} else {
const xmlChar *tagNameC = (const xmlChar *)[iTagName cStringUsingEncoding:NSUTF8StringEncoding];
cur = cur->children;
while (cur != nil) {
if (cur->type == XML_ELEMENT_NODE && !xmlStrcmp(cur->name, tagNameC)) {
break;
}
cur = cur->next;
}
}
if (!cur) {
break;
}
}
if (cur) {
// enumerate
NSString *childTagName = [components lastObject];
do {
if (cur->type == XML_ELEMENT_NODE) {
RXMLElement *element = [RXMLElement elementFromXMLDoc:self.xmlDoc node:cur];
blk(element);
}
if ([childTagName isEqualToString:@"*"]) {
cur = cur->next;
} else {
const xmlChar *tagNameC = (const xmlChar *)[childTagName cStringUsingEncoding:NSUTF8StringEncoding];
while ((cur = cur->next)) {
if (cur->type == XML_ELEMENT_NODE && !xmlStrcmp(cur->name, tagNameC)) {
break;
}
}
}
} while (cur);
}
}
- (void)iterateWithRootXPath:(NSString *)xpath usingBlock:(void (^)(RXMLElement *))blk {
NSArray *children = [self childrenWithRootXPath:xpath];
[self iterateElements:children usingBlock:blk];
}
- (void)iterateElements:(NSArray *)elements usingBlock:(void (^)(RXMLElement *))blk {
for (RXMLElement *iElement in elements) {
blk(iElement);
}
}
@end