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Initial implementation of template class

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Ziver Koc 2015-03-23 23:09:56 +00:00
parent 91cadbb301
commit 500f45b77a
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163
src/zutil/parser/Templator.java Normal file
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/*
* Copyright (c) 2015 Ziver
*
* 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.
*/
package zutil.parser;
import zutil.struct.MutableInt;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
/**
* Class for generating dynamic text/code from set data.
* The syntax is similar to the javascript mustache library.
*
* Supported tags:
* * {{key}}: will be replaced with the string from the key
*
*
* Created by Ziver on 2015-03-23.
*/
public class Templator {
private HashMap<String,Object> data;
private TemplateEntity tmplRoot;
public Templator(String tmpl){
this.data = new HashMap<String, Object>();
parseTemplate(tmpl);
}
public void setData(String key, Object data){
this.data.put(key, data);
}
/**
* Will clear all data attributes
*/
public void clear(){
data.clear();
}
public String compile(){
StringBuilder str = new StringBuilder();
if(tmplRoot != null)
tmplRoot.compile(str);
return str.toString();
}
/**
* Will pare or re-parse the source template.
*/
private void parseTemplate(String tmpl){
TemplateNode node = new TemplateNode();
parseTemplate(node, tmpl, new MutableInt());
tmplRoot = node;
}
private void parseTemplate(TemplateNode root, String tmpl, MutableInt m){
StringBuilder data = new StringBuilder();
boolean tagOpen = false;
boolean secondOpenBracet = false;
boolean secondCloseBracet = false;
for(; m.i<tmpl.length(); ++m.i){
char c = tmpl.charAt(m.i);
switch(c){
case '{':
c = tmpl.charAt(++m.i);
switch(c){
case '{':
root.addEntity(new TmplStaticString(data.toString()));
data = new StringBuilder();
break;
default:
data.append('{').append(c);
}
break;
case '}':
c = tmpl.charAt(++m.i);
switch(c){
case '}':
break;
default:
data.append('}').append(c);
}
break;
default:
data.append(c);
}
}
if(data.length() > 0)
root.addEntity(new TmplStaticString(data.toString()));
}
/**************************** Template Helper Classes *************************************/
protected interface TemplateEntity {
public void compile(StringBuilder str);
}
protected class TemplateNode implements TemplateEntity {
private List<TemplateEntity> entities;
public TemplateNode(){
this.entities = new ArrayList<TemplateEntity>();
}
public void addEntity(TemplateEntity s){
entities.add(s);
}
public void compile(StringBuilder str) {
for(TemplateEntity sec : entities)
sec.compile(str);
}
}
protected class TmplStaticString implements TemplateEntity {
private String text;
public TmplStaticString(String text){
this.text = text;
}
public void compile(StringBuilder str) {
str.append(text);
}
}
protected class TmplDataAttribute implements TemplateEntity {
private String key;
public TmplDataAttribute(String key){
this.key = key;
}
public void compile(StringBuilder str) {
if(data.containsKey(key))
str.append(data.get(key).toString());
else
str.append("{{").append(key).append("}}");
}
}
}

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src/zutil/test/TemplatorTest.java Normal file
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/*
* Copyright (c) 2015 Ziver
*
* 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.
*/
package zutil.test;
import org.junit.Test;
import zutil.parser.Templator;
import static org.junit.Assert.*;
/**
* Created by Ziver on 2015-03-23.
*/
public class TemplatorTest {
@Test
public void simpleAttributeTest(){
Templator tmpl = new Templator("<HTML>{{test}}</HTML>");
tmpl.setData("test", "1234");
assertEquals("<HTML>1234</HTML>", tmpl.compile());
}
@Test
public void emptyAttributeTest(){
Templator tmpl = new Templator("<HTML>{{test}}</HTML>");
assertEquals("<HTML>{{test}}</HTML>", tmpl.compile());
}
@Test
public void incorrectTagsTest(){
assertEquals("<HTML>{{</HTML>",
new Templator("<HTML>{{</HTML>").compile());
assertEquals("<HTML>}}</HTML>",
new Templator("<HTML>}}</HTML>").compile());
assertEquals("<HTML></HTML>}}",
new Templator("<HTML>}}</HTML>}}").compile());
assertEquals("<HTML></HTML>{{",
new Templator("<HTML></HTML>{{").compile());
assertEquals("<HTML>{</HTML>",
new Templator("<HTML>{</HTML>").compile());
assertEquals("<HTML>}</HTML>{{",
new Templator("<HTML>}</HTML>").compile());
assertEquals("<HTML>{}</HTML>{{",
new Templator("<HTML>{}</HTML>").compile());
assertEquals("<HTML>{test}</HTML>",
new Templator("<HTML>{test}</HTML>").compile());
}
}