/**
* Copyright 2008 biaoping.yin
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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.frameworkset.util.tokenizer;
import java.util.ArrayList;
import java.util.List;
/**
* 通用文本语法解析工具，根据一些指定语法前缀和后缀
* @author biaoping.yin
*
*/
public class TextGrammarParser {
public static class GrammarToken
{
public static final int TextPlain = 0;
public static final int VARIABLE = 1;
private int position;
private String text;
private String defaultValue;
/**
* 0 普通text
* 1 变量
*/
private int type;
public int getPosition() {
return position;
}
public void setPosition(int position) {
this.position = position;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
public String toString()
{
StringBuilder builder = new StringBuilder();
builder.append("text=").append(text).append("|");
builder.append("position=").append(position).append("|");
builder.append("type=").append(type == TextPlain?"普通文本":"结构变量").append("\r\n");
return builder.toString();
}
public boolean texttoken()
{
return this.type == TextPlain;
}
public boolean varibletoken()
{
return this.type == VARIABLE;
}
public String getDefaultValue() {
return defaultValue;
}
public void setDefaultValue(String defaultValue) {
this.defaultValue = defaultValue;
}
}
private static boolean tplstart(char value,char[] pre,String text,int textsize,int curpos)
{
boolean tplstart = true;
int k = 0;
for(int i = 1; i < pre.length; i ++)
{
k = curpos + i;
if(k>=textsize || text.charAt(k) != pre[i])
{
tplstart = false;
break;
}
}
return tplstart;
}
/**
*
* 计算模板中引用的include模板文件，并将引用文件的内容合并到当前模板中
* include中对应的文件内容引用的地址都需要用<cms:uri link="path"/>来指定，这样才不会有发布相对路径问题
* #inlcude(head.html)
*
* @param content
* @param tokenpre
* @param tokenend
* @return
*/
public static List<GrammarToken> parser(String content,String tokenpre,char tokenend)
{
StringBuilder builder = new StringBuilder();
StringBuilder tplbuilder = new StringBuilder();
List<GrammarToken> tokens = new ArrayList<GrammarToken>();
int size = content.length();
char[] pre = tokenpre.toCharArray();
boolean tplstart = false;
for(int i = 0; i < size; i ++)
{
char c = content.charAt(i);
if(c == pre[0])
{
// if(content.charAt(i+1) == 'i'
// && content.charAt(i+2) == 'n'
// && content.charAt(i+3) == 'c'
// && content.charAt(i+4) == 'l'
// && content.charAt(i+5) == 'u'
// && content.charAt(i+6) == 'd'
// && content.charAt(i+7) == 'e'
// && content.charAt(i+8) == '(')
if(tplstart(c, pre,content,size,i))
{
if(tplstart) //如果之前已经开始模板前导
{
// builder.append("#include(").append(tplbuilder.toString());
builder.append(tokenpre).append(tplbuilder.toString());
tplbuilder.setLength(0);
}
else
{
tplstart = true;
}
// i = i+8;
i = i+pre.length - 1;
}
else
{
if(tplstart)
{
tplbuilder.append(c);
}
else
{
builder.append(c);
}
}
}
else if(c == tokenend)
{
if(tplstart)
{
// tplbuilder.append(c);
if(tplbuilder.length() > 0)
{
if(builder.length() > 0)
{
GrammarToken stringtoken = new GrammarToken();
stringtoken.position = tokens.size() ;
stringtoken.text = builder.toString();
stringtoken.type = GrammarToken.TextPlain;//宏文件路径
builder.setLength(0);
tokens.add(stringtoken);
}
GrammarToken stringtoken = new GrammarToken();
stringtoken.position = tokens.size() ;
String txt = tplbuilder.toString();
int pos = txt.indexOf(":");
String defaultValue = null;
if(pos > 0 ){
defaultValue = txt.substring(pos+1);
txt = txt.substring(0, pos);
stringtoken.setDefaultValue(defaultValue);
}
stringtoken.text = txt;
stringtoken.type = GrammarToken.VARIABLE;//宏文件路径
tplbuilder.setLength(0);
tokens.add(stringtoken);
}
else
{
// builder.append("#include()");
builder.append(tokenpre).append(tokenend);
}
tplstart = false;
}
else
{
builder.append(c);
}
}
else
{
if(tplstart)
{
tplbuilder.append(c);
}
else
{
builder.append(c);
}
}
}
if(tplbuilder.length() > 0)
{
// builder.append("#include(").append(tplbuilder.toString());
builder.append(tokenpre).append(tplbuilder.toString());
}
tplbuilder = null;
if(builder.length() > 0)
{
GrammarToken stringtoken = new GrammarToken();
stringtoken.position = tokens.size() ;
stringtoken.text = builder.toString();
stringtoken.type = GrammarToken.TextPlain;//宏文件路径
builder.setLength(0);
tokens.add(stringtoken);
}
builder = null;
return tokens;
}
}