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/**
* Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
*
* Licensed under the GPL, Version 3.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.gnu.org/licenses/gpl.html
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.tinygroup.xmlparser.parser;
import org.tinygroup.parser.NodeType;
import org.tinygroup.parser.Parser;
import org.tinygroup.xmlparser.XmlDocument;
import org.tinygroup.xmlparser.XmlNodeType;
import org.tinygroup.xmlparser.node.XmlNode;
public abstract class XmlParser implements
Parser {
private static String startPattern = null;
/**
* 获取指定节点类型开始标签的结束标识符的Pattern（正则表达式）
*
* @param nt
* @return
*/
static String getHeadEndPattern(NodeType nt) {
if (nt.getHead() != null && nt.getHead().getEnd() != null) {
return replaceSpecialChar(nt.getHead().getEnd());
}
return null;
}
/**
* 获取指定节点类型结尾标签（NodeSign）的开始标识符的Pattern(正则表达式)
*
* @param nt
* @return
*/
static String getTailStartPattern(NodeType nt) {
if (nt.getTail() != null && nt.getTail().getStart() != null) {
return replaceSpecialChar(nt.getTail().getStart());
}
return null;
}
/**
* 获取指定节点类型结尾标签的结束标识符的Pattern（正则表达式）
*
* @param nt
* @return
*/
static String getTailEndPattern(NodeType nt) {
if (nt.getTail() != null && nt.getTail().getEnd() != null) {
return replaceSpecialChar(nt.getTail().getEnd());
}
return null;
}
/**
* 获取所有可用标记的Pattern(正则表达式)
*
* @return
*/
static String getHeadStartPattern() {
if (startPattern != null){
return startPattern;
}
StringBuffer pattern = new StringBuffer("<[/]|[/]>");// 正则表达式
for (XmlNodeType nt : XmlNodeType.values()) {
if (nt.getHead() != null) {
String sn = nt.getHead().getStart();
if (sn != null) {
if (pattern.length() > 0) {
pattern.append("|");
}
pattern.append(replaceSpecialChar(sn));
}
}
}
startPattern = pattern.toString();
return startPattern;
}
private static String replaceSpecialChar(String sn) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < sn.length(); i++) {
char c = sn.charAt(i);
switch (c) {
case '[':
sb.append("\\[");
break;
case ']':
sb.append("\\]");
break;
case '?':
sb.append("\\?");
break;
case '!':
sb.append("\\!");
break;
case '-':
sb.append("\\-");
break;
default:
sb.append(c);
break;
}
}
return sb.toString();
}
}
