Token.java #2

package journal.reader;

import java.text.ParseException;

// contains one token
// hashes and compares on name and the fact that the token started at the beginning

public class Token {
	public enum Type {
		START_TOKEN,
		STRING_TOKEN,
		INTEGER_TOKEN,
		HEX_TOKEN,
		BASE64_TOKEN
	}
	
	private String value;
	private boolean atLeftMargin;
	private int column;
	private int line;
	private Type type;
	private ActionType action = null;
	
	public Token(int column, int line, boolean atLeftMargin) {
		this.column = column;
		this.line = line;
		this.atLeftMargin = atLeftMargin;
	}
	
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (obj == null || obj.getClass() != this.getClass()) {
			return false;
		}
		Token other = (Token) obj;
		return (value.equals(other.value) && atLeftMargin == other.atLeftMargin);
	}
	
	public int hashCode() {
		return value.hashCode();
	}
	
	public String toString() {
		StringBuffer buf = new StringBuffer("Token : ");
		
		buf.append(value);
		buf.append(" line = "); buf.append(line);
		buf.append(" col = "); buf.append(column);
		buf.append(" start = "); buf.append(atLeftMargin);
		buf.append(" type = "); buf.append(type);
		
		return buf.toString();
	}
	
	public ActionType getAction() {
		return action;
	}
	
	public void setValue(String value, Type type) throws ParseException {
		this.value = value;
		this.type = type;
		
		if (type == Type.START_TOKEN) {
			setActionType();
		}
		else if (atLeftMargin) {
			throw new ParseException("Illegal token at left margin : " + this, line);
		}
	}
	
	private void setActionType() throws ParseException {
		for(ActionType act : ActionType.values()) {
			if (value.equals(act.symbol)) {
				action = act;
				return;
			}
		}
		
		throw new ParseException("Not a legal StartToken : " + this, line);
	}

	
	public String getValue() {
		return value;
	}

	public boolean isAtLeftMargin() {
		return atLeftMargin;
	}

	public int getColumn() {
		return column;
	}

	public int getLine() {
		return line;
	}

	public Type getType() {
		return type;
	}

	public void setAtLeftMargin(boolean atLeftMargin) {
		this.atLeftMargin = atLeftMargin;
	}
}