VariableParser.java

package com.proalpha.java.oea.plugins.querygenerator;
 
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class VariableParser {
    
    private String parseText = "";
    private String resultText = "";
    
    private List<Variable> variableList = null;
    
    public VariableParser() {
        super();
    }
 
    public VariableParser(String parseText) {
        super();
        this.parseText = parseText;
    }
    
    public void parse() {
        
        variableList = new ArrayList<Variable>();
        
        StringBuffer buffer = new StringBuffer(parseText.length());
        
        Pattern pattern = Pattern.compile("\\$\\{([^\\}]+)\\}");
        Matcher matcher = pattern.matcher(parseText);
 
        int lastMatchEnd = 0;
        
        while(matcher.find()) {
            
            buffer.append(parseText.substring(lastMatchEnd, matcher.start()));
            Variable variable = new Variable(matcher.group(1), buffer.length());
            
            buffer.append(variable.getText());
            
            variableList.add(variable);
                
            lastMatchEnd = matcher.end();
            
        }
        
        buffer.append(parseText.substring(lastMatchEnd));
        resultText = buffer.toString();
        
    }
    
    public String getParseText() {
        return parseText;
    }
 
    public void setParseText(String parseText) {
        this.parseText = parseText;
    }
 
    public String getResultText() {
        return resultText;
    }
 
    public Variable[] getVariables() {
        if (variableList != null)
            return variableList.toArray(new Variable[variableList.size()]);
        else
            return new Variable[0];
    }
    
}