/*******************************************************************************
* Copyright (c) 2007 Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is made available under the terms of the
* Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.common.el.internal.core.parser.rule;
import org.jboss.tools.common.el.core.ElCoreMessages;
import org.jboss.tools.common.el.core.parser.IRule;
import org.jboss.tools.common.el.core.parser.Tokenizer;
import org.jboss.tools.common.el.internal.core.parser.token.ArgEndTokenDescription;
import org.jboss.tools.common.el.internal.core.parser.token.ArrayEndTokenDescription;
import org.jboss.tools.common.el.internal.core.parser.token.CommaTokenDescription;
import org.jboss.tools.common.el.internal.core.parser.token.EndELTokenDescription;
import org.jboss.tools.common.el.internal.core.parser.token.ExprEndTokenDescription;
import org.jboss.tools.common.el.internal.core.parser.token.OperationTokenDescription;
import org.jboss.tools.common.el.internal.core.parser.token.ParamEndTokenDescription;
import org.jboss.tools.common.el.internal.core.parser.token.ParamUtil;
import org.jboss.tools.common.el.internal.core.parser.token.WhiteSpaceTokenDescription;
/**
*
* @author V. Kabanovich
*
*/
public class OperationRule implements IRule, BasicStates {
public static OperationRule INSTANCE = new OperationRule();
public int[] getStartStates() {
return new int[] {
STATE_EXPECTING_OPERATION,
};
}
public int getFinalState(int state, int token) {
switch (token) {
case WhiteSpaceTokenDescription.WHITESPACE:
return state;
case EndELTokenDescription.END_EL:
return STATE_EXPECTING_EL;
case CommaTokenDescription.COMMA:
case OperationTokenDescription.OPERATION:
return STATE_EXPECTING_OPERAND;
case ParamEndTokenDescription.PARAM_END:
case ArgEndTokenDescription.ARG_END:
case ArrayEndTokenDescription.ARRAY_END:
return STATE_EXPECTING_CALL_AFTER_METHOD;
case ExprEndTokenDescription.EXPR_END:
return STATE_EXPECTING_CALL; // STATE_EXPECTING_OPERATION;
}
return 0;
}
public int[] getTokenTypes(int state) {
if(state == STATE_EXPECTING_OPERATION) {
return new int[] {
WhiteSpaceTokenDescription.WHITESPACE,
ParamEndTokenDescription.PARAM_END,
ArgEndTokenDescription.ARG_END,
ArrayEndTokenDescription.ARRAY_END,
ExprEndTokenDescription.EXPR_END,
CommaTokenDescription.COMMA,
OperationTokenDescription.OPERATION,
EndELTokenDescription.END_EL,
};
}
return new int[0];
}
public String getProblem(int state, Tokenizer tokenizer) {
if(ParamUtil.isMethodParamContext(tokenizer.getContext())) {
return ElCoreMessages.OperationRule_ExpectingRParen;
} else if(ParamUtil.isComplexExpressionContext(tokenizer.getContext())) {
return ElCoreMessages.OperationRule_ExpectingRParen;
} else if(ParamUtil.isArgContext(tokenizer.getContext())) {
return ElCoreMessages.OperationRule_ExpectingRBracket;
} else if(ParamUtil.isArrayContext(tokenizer.getContext())) {
return ElCoreMessages.OperationRule_ExpectingRBracket;
}
return ElCoreMessages.OperationRule_ExpectingRBrace;
}
}