/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.es.parser;
import com.caucho.es.ESBase;
import com.caucho.es.ESBoolean;
import com.caucho.es.ESException;
import com.caucho.es.ESWrapperException;
import java.io.IOException;
/**
* Expr is an intermediate form representing an expression.
*/
class BooleanBinaryExpr extends BinaryExpr {
private BooleanBinaryExpr(Block block, Expr left, Expr right, int op)
{
super(block, left, right, op);
}
static Expr create(Block block, Expr left, Expr right, int op)
throws ESException
{
if (! (left instanceof LiteralExpr) || ! (right instanceof LiteralExpr))
return new BooleanBinaryExpr(block, left, right, op);
ESBase lvalue = ((LiteralExpr) left).getLiteral();
ESBase rvalue = ((LiteralExpr) right).getLiteral();
boolean value;
try {
switch (op) {
case '<':
value = lvalue.lessThan(rvalue, false);
break;
case '>':
value = rvalue.lessThan(lvalue, false);
break;
case Lexer.LEQ:
value = rvalue.lessThan(lvalue, true);
break;
case Lexer.GEQ:
value = lvalue.lessThan(rvalue, true);
break;
case Lexer.EQ:
value = lvalue.ecmaEquals(rvalue);
break;
case Lexer.NEQ:
value = ! lvalue.ecmaEquals(rvalue);
break;
case Lexer.STRICT_EQ:
value = lvalue.equals(rvalue);
break;
case Lexer.STRICT_NEQ:
value = ! lvalue.equals(rvalue);
break;
default:
throw new RuntimeException("foo");
}
} catch (Throwable e) {
throw new ESWrapperException(e);
}
return new LiteralExpr(block, ESBoolean.create(value));
}
int getType()
{
return TYPE_BOOLEAN;
}
void printBooleanImpl() throws IOException
{
switch (op) {
case '<':
if (left.getType() == TYPE_INTEGER && right.getType() == TYPE_INTEGER) {
cl.print("(");
left.printInt32();
cl.print("<");
right.printInt32();
cl.print(")");
} else if (left.isNumeric() || right.isNumeric()) {
cl.print("(");
left.printNum();
cl.print("<");
right.printNum();
cl.print(")");
} else {
left.print();
cl.print(".lessThan(");
right.print();
cl.print(", false)");
}
break;
case '>':
if (left.isNumeric() || right.isNumeric()) {
cl.print("(");
left.printNum();
cl.print(">");
right.printNum();
cl.print(")");
} else {
left.print();
cl.print(".greaterThan(");
right.print();
cl.print(", false)");
}
break;
case Lexer.LEQ:
if (left.isNumeric() || right.isNumeric()) {
cl.print("(");
left.printNum();
cl.print("<=");
right.printNum();
cl.print(")");
} else {
left.print();
cl.print(".greaterThan(");
right.print();
cl.print(", true)");
}
break;
case Lexer.GEQ:
if (left.isNumeric() || right.isNumeric()) {
cl.print("(");
left.printNum();
cl.print(">=");
right.printNum();
cl.print(")");
} else {
left.print();
cl.print(".lessThan(");
right.print();
cl.print(", true)");
}
break;
case Lexer.EQ:
if (left.isNumeric() && right.isNumeric()) {
cl.print("(");
left.printNum();
cl.print("==");
right.printNum();
cl.print(")");
} else {
left.print();
cl.print(".ecmaEquals(");
right.print();
cl.print(")");
}
break;
case Lexer.NEQ:
if (left.isNumeric() && right.isNumeric()) {
cl.print("(");
left.printNum();
cl.print("!=");
right.printNum();
cl.print(")");
} else {
cl.print("!");
left.print();
cl.print(".ecmaEquals(");
right.print();
cl.print(")");
}
break;
case Lexer.STRICT_EQ:
if (left.isNumeric() && right.isNumeric()) {
cl.print("(");
left.printNum();
cl.print("==");
right.printNum();
cl.print(")");
} else {
left.print();
cl.print(".equals(");
right.print();
cl.print(")");
}
break;
case Lexer.STRICT_NEQ:
if (left.isNumeric() && right.isNumeric()) {
cl.print("(");
left.printNum();
cl.print("!=");
right.printNum();
cl.print(")");
} else {
cl.print("!");
left.print();
cl.print(".equals(");
right.print();
cl.print(")");
}
break;
default:
throw new IOException("foo");
}
}
}