/**
* Copyright (C) 2010 dennis zhuang (killme2008@gmail.com)
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
**/
package com.googlecode.aviator.runtime.type;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import com.googlecode.aviator.exception.ExpressionRuntimeException;
import com.googlecode.aviator.utils.TypeUtils;
/**
* A aviator string
*
* @author dennis
*
*/
public class AviatorString extends AviatorObject {
final String lexeme;
@Override
public AviatorType getAviatorType() {
return AviatorType.String;
}
@Override
public Object getValue(Map<String, Object> env) {
return this.lexeme;
}
public AviatorString(String lexeme) {
super();
this.lexeme = lexeme;
}
@Override
public AviatorObject add(AviatorObject other, Map<String, Object> env) {
switch (other.getAviatorType()) {
case String:
AviatorString otherString = (AviatorString) other;
return new AviatorString(this.lexeme + otherString.lexeme);
case Boolean:
AviatorBoolean otherBoolean = (AviatorBoolean) other;
return new AviatorString(this.lexeme + otherBoolean.value);
case BigInt:
case Decimal:
case Long:
case Double:
AviatorNumber otherNumber = (AviatorNumber) other;
return new AviatorString(this.lexeme + otherNumber.number);
case Nil:
case JavaType:
return new AviatorString(this.lexeme + other.getValue(env));
case Pattern:
AviatorPattern otherPatterh = (AviatorPattern) other;
return new AviatorString(this.lexeme + otherPatterh.pattern.pattern());
default:
return super.add(other, env);
}
}
private int tryCompareDate(final Date otherDate) {
try {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SS");
Date thisDate = simpleDateFormat.parse(this.lexeme);
return thisDate.compareTo(otherDate);
}
catch (Throwable t) {
throw new ExpressionRuntimeException("Compare date error", t);
}
}
@Override
public int compare(AviatorObject other, Map<String, Object> env) {
if (this == other) {
return 0;
}
switch (other.getAviatorType()) {
case String:
AviatorString otherString = (AviatorString) other;
return this.lexeme.compareTo(otherString.lexeme);
case JavaType:
AviatorJavaType javaType = (AviatorJavaType) other;
final Object otherJavaValue = javaType.getValue(env);
if (otherJavaValue == null) {
return 1;
}
if(TypeUtils.isString(otherJavaValue)) {
return this.lexeme.compareTo(String.valueOf(otherJavaValue));
}
else if (otherJavaValue instanceof Date) {
return this.tryCompareDate((Date) otherJavaValue);
}
else {
throw new ExpressionRuntimeException("Could not compare " + this + " with " + other);
}
case Nil:
return 1;
default:
throw new ExpressionRuntimeException("Could not compare " + this + " with " + other);
}
}
public String getLexeme() {
return this.lexeme;
}
}