// $ANTLR 2.7.2: "ValidWhenParser.g" -> "ValidWhenParser.java"$
/*
* $Id: ValidWhenParser.java 504715 2007-02-07 22:10:26Z bayard $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.struts.validator.validwhen;
import java.util.Stack;
import org.apache.commons.validator.util.ValidatorUtils;
import antlr.TokenBuffer;
import antlr.TokenStreamException;
import antlr.TokenStreamIOException;
import antlr.ANTLRException;
import antlr.LLkParser;
import antlr.Token;
import antlr.TokenStream;
import antlr.RecognitionException;
import antlr.NoViableAltException;
import antlr.MismatchedTokenException;
import antlr.SemanticException;
import antlr.ParserSharedInputState;
import antlr.collections.impl.BitSet;
public class ValidWhenParser extends antlr.LLkParser implements ValidWhenParserTokenTypes
{
Stack argStack = new Stack();
Object form;
int index;
String value;
public void setForm(Object f) { form = f; };
public void setIndex (int i) { index = i; };
public void setValue (String v) { value = v; };
public boolean getResult() {
return ((Boolean)argStack.peek()).booleanValue();
}
private final int LESS_EQUAL=0;
private final int LESS_THAN=1;
private final int EQUAL=2;
private final int GREATER_THAN=3;
private final int GREATER_EQUAL=4;
private final int NOT_EQUAL=5;
private final int AND=6;
private final int OR=7;
private boolean evaluateComparison (Object v1, Object compare, Object v2) {
boolean intCompare = true;
if ((v1 == null) || (v2 == null)) {
if (String.class.isInstance(v1)) {
if (((String) v1).length() == 0) {
v1 = null;
}
}
if (String.class.isInstance(v2)) {
if (((String) v2).length() == 0) {
v2 = null;
}
}
switch (((Integer)compare).intValue()) {
case LESS_EQUAL:
case GREATER_THAN:
case LESS_THAN:
case GREATER_EQUAL:
return false;
case EQUAL:
return (v1 == v2);
case NOT_EQUAL:
return (v1 != v2);
}
}
if ((Integer.class.isInstance(v1) ||
String.class.isInstance(v1)) &&
(Integer.class.isInstance(v2) ||
String.class.isInstance(v2))) {
intCompare = true;
} else {
intCompare = false;
}
if (intCompare) {
try {
int v1i = 0, v2i = 0;
if (Integer.class.isInstance(v1)) {
v1i = ((Integer)v1).intValue();
} else {
v1i = Integer.parseInt((String) v1);
}
if (Integer.class.isInstance(v2)) {
v2i = ((Integer)v2).intValue();
} else {
v2i = Integer.parseInt((String) v2);
}
switch (((Integer)compare).intValue()) {
case LESS_EQUAL:
return (v1i <= v2i);
case LESS_THAN:
return (v1i < v2i);
case EQUAL:
return (v1i == v2i);
case GREATER_THAN:
return (v1i > v2i);
case GREATER_EQUAL:
return (v1i >= v2i);
case NOT_EQUAL:
return (v1i != v2i);
}
} catch (NumberFormatException ex) {};
}
String v1s = "", v2s = "";
if (Integer.class.isInstance(v1)) {
v1s = ((Integer)v1).toString();
} else {
v1s = (String) v1;
}
if (Integer.class.isInstance(v2)) {
v2s = ((Integer)v2).toString();
} else {
v2s = (String) v2;
}
int res = v1s.compareTo(v2s);
switch (((Integer)compare).intValue()) {
case LESS_EQUAL:
return (res <= 0);
case LESS_THAN:
return (res < 0);
case EQUAL:
return (res == 0);
case GREATER_THAN:
return (res > 0);
case GREATER_EQUAL:
return (res >= 0);
case NOT_EQUAL:
return (res != 0);
}
return true;
}
protected ValidWhenParser(TokenBuffer tokenBuf, int k) {
super(tokenBuf,k);
tokenNames = _tokenNames;
}
public ValidWhenParser(TokenBuffer tokenBuf) {
this(tokenBuf,6);
}
protected ValidWhenParser(TokenStream lexer, int k) {
super(lexer,k);
tokenNames = _tokenNames;
}
public ValidWhenParser(TokenStream lexer) {
this(lexer,6);
}
public ValidWhenParser(ParserSharedInputState state) {
super(state,6);
tokenNames = _tokenNames;
}
public final void integer() throws RecognitionException, TokenStreamException {
Token d = null;
Token h = null;
Token o = null;
switch ( LA(1)) {
case DECIMAL_LITERAL:
{
d = LT(1);
match(DECIMAL_LITERAL);
argStack.push(Integer.decode(d.getText()));
break;
}
case HEX_LITERAL:
{
h = LT(1);
match(HEX_LITERAL);
argStack.push(Integer.decode(h.getText()));
break;
}
case OCTAL_LITERAL:
{
o = LT(1);
match(OCTAL_LITERAL);
argStack.push(Integer.decode(o.getText()));
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
public final void string() throws RecognitionException, TokenStreamException {
Token str = null;
str = LT(1);
match(STRING_LITERAL);
argStack.push(str.getText().substring(1, str.getText().length()-1));
}
public final void identifier() throws RecognitionException, TokenStreamException {
Token str = null;
str = LT(1);
match(IDENTIFIER);
argStack.push(str.getText());
}
public final void field() throws RecognitionException, TokenStreamException {
if ((LA(1)==IDENTIFIER) && (LA(2)==LBRACKET) && (LA(3)==RBRACKET) && (LA(4)==IDENTIFIER)) {
identifier();
match(LBRACKET);
match(RBRACKET);
identifier();
Object i2 = argStack.pop();
Object i1 = argStack.pop();
argStack.push(ValidatorUtils.getValueAsString(form, i1 + "[" + index + "]" + i2));
}
else if ((LA(1)==IDENTIFIER) && (LA(2)==LBRACKET) && ((LA(3) >= DECIMAL_LITERAL && LA(3) <= OCTAL_LITERAL)) && (LA(4)==RBRACKET) && (LA(5)==IDENTIFIER)) {
identifier();
match(LBRACKET);
integer();
match(RBRACKET);
identifier();
Object i5 = argStack.pop();
Object i4 = argStack.pop();
Object i3 = argStack.pop();
argStack.push(ValidatorUtils.getValueAsString(form, i3 + "[" + i4 + "]" + i5));
}
else if ((LA(1)==IDENTIFIER) && (LA(2)==LBRACKET) && ((LA(3) >= DECIMAL_LITERAL && LA(3) <= OCTAL_LITERAL)) && (LA(4)==RBRACKET) && (LA(5)==LBRACKET)) {
identifier();
match(LBRACKET);
integer();
match(RBRACKET);
match(LBRACKET);
Object i7 = argStack.pop();
Object i6 = argStack.pop();
argStack.push(ValidatorUtils.getValueAsString(form, i6 + "[" + i7 + "]"));
}
else if ((LA(1)==IDENTIFIER) && (LA(2)==LBRACKET) && (LA(3)==RBRACKET) && (_tokenSet_0.member(LA(4)))) {
identifier();
match(LBRACKET);
match(RBRACKET);
Object i8 = argStack.pop();
argStack.push(ValidatorUtils.getValueAsString(form, i8 + "[" + index + "]"));
}
else if ((LA(1)==IDENTIFIER) && (_tokenSet_0.member(LA(2)))) {
identifier();
Object i9 = argStack.pop();
argStack.push(ValidatorUtils.getValueAsString(form, (String)i9));
}
else {
throw new NoViableAltException(LT(1), getFilename());
}
}
public final void literal() throws RecognitionException, TokenStreamException {
switch ( LA(1)) {
case DECIMAL_LITERAL:
case HEX_LITERAL:
case OCTAL_LITERAL:
{
integer();
break;
}
case STRING_LITERAL:
{
string();
break;
}
case LITERAL_null:
{
match(LITERAL_null);
argStack.push(null);
break;
}
case THIS:
{
match(THIS);
argStack.push(value);
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
public final void value() throws RecognitionException, TokenStreamException {
switch ( LA(1)) {
case IDENTIFIER:
{
field();
break;
}
case DECIMAL_LITERAL:
case HEX_LITERAL:
case OCTAL_LITERAL:
case STRING_LITERAL:
case LITERAL_null:
case THIS:
{
literal();
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
public final void expression() throws RecognitionException, TokenStreamException {
expr();
match(Token.EOF_TYPE);
}
public final void expr() throws RecognitionException, TokenStreamException {
if ((LA(1)==LPAREN) && (_tokenSet_1.member(LA(2)))) {
match(LPAREN);
comparisonExpression();
match(RPAREN);
}
else if ((LA(1)==LPAREN) && (LA(2)==LPAREN)) {
match(LPAREN);
joinedExpression();
match(RPAREN);
}
else {
throw new NoViableAltException(LT(1), getFilename());
}
}
public final void comparisonExpression() throws RecognitionException, TokenStreamException {
value();
comparison();
value();
Object v2 = argStack.pop();
Object comp = argStack.pop();
Object v1 = argStack.pop();
argStack.push(new Boolean(evaluateComparison(v1, comp, v2)));
}
public final void joinedExpression() throws RecognitionException, TokenStreamException {
expr();
join();
expr();
Boolean v1 = (Boolean) argStack.pop();
Integer join = (Integer) argStack.pop();
Boolean v2 = (Boolean) argStack.pop();
if (join.intValue() == AND) {
argStack.push(new Boolean(v1.booleanValue() && v2.booleanValue()));
} else {
argStack.push(new Boolean(v1.booleanValue() || v2.booleanValue()));
}
}
public final void join() throws RecognitionException, TokenStreamException {
switch ( LA(1)) {
case ANDSIGN:
{
match(ANDSIGN);
argStack.push(new Integer(AND));
break;
}
case ORSIGN:
{
match(ORSIGN);
argStack.push(new Integer(OR));
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
public final void comparison() throws RecognitionException, TokenStreamException {
switch ( LA(1)) {
case EQUALSIGN:
{
match(EQUALSIGN);
argStack.push(new Integer(EQUAL));
break;
}
case GREATERTHANSIGN:
{
match(GREATERTHANSIGN);
argStack.push(new Integer(GREATER_THAN));
break;
}
case GREATEREQUALSIGN:
{
match(GREATEREQUALSIGN);
argStack.push(new Integer(GREATER_EQUAL));
break;
}
case LESSTHANSIGN:
{
match(LESSTHANSIGN);
argStack.push(new Integer(LESS_THAN));
break;
}
case LESSEQUALSIGN:
{
match(LESSEQUALSIGN);
argStack.push(new Integer(LESS_EQUAL));
break;
}
case NOTEQUALSIGN:
{
match(NOTEQUALSIGN);
argStack.push(new Integer(NOT_EQUAL));
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
public static final String[] _tokenNames = {
"<0>",
"EOF",
"<2>",
"NULL_TREE_LOOKAHEAD",
"DECIMAL_LITERAL",
"HEX_LITERAL",
"OCTAL_LITERAL",
"STRING_LITERAL",
"IDENTIFIER",
"LBRACKET",
"RBRACKET",
"\"null\"",
"THIS",
"LPAREN",
"RPAREN",
"\"and\"",
"\"or\"",
"EQUALSIGN",
"GREATERTHANSIGN",
"GREATEREQUALSIGN",
"LESSTHANSIGN",
"LESSEQUALSIGN",
"NOTEQUALSIGN",
"WS"
};
private static final long[] mk_tokenSet_0() {
long[] data = { 8273920L, 0L};
return data;
}
public static final BitSet _tokenSet_0 = new BitSet(mk_tokenSet_0());
private static final long[] mk_tokenSet_1() {
long[] data = { 6640L, 0L};
return data;
}
public static final BitSet _tokenSet_1 = new BitSet(mk_tokenSet_1());
}