diff options
Diffstat (limited to 'xmerge/source/pexcel/java/org/openoffice/xmerge/converter/xml/sxc/pexcel/records/formula/PrecedenceTable.java')
| -rw-r--r-- | xmerge/source/pexcel/java/org/openoffice/xmerge/converter/xml/sxc/pexcel/records/formula/PrecedenceTable.java | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/xmerge/source/pexcel/java/org/openoffice/xmerge/converter/xml/sxc/pexcel/records/formula/PrecedenceTable.java b/xmerge/source/pexcel/java/org/openoffice/xmerge/converter/xml/sxc/pexcel/records/formula/PrecedenceTable.java new file mode 100644 index 000000000000..551b77cf6e7f --- /dev/null +++ b/xmerge/source/pexcel/java/org/openoffice/xmerge/converter/xml/sxc/pexcel/records/formula/PrecedenceTable.java @@ -0,0 +1,85 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org 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 version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +package org.openoffice.xmerge.converter.xml.sxc.pexcel.records.formula; + +import java.util.HashMap; + +/** + * This class defines the precedence applied to each operator when performing a conversion + * {@link org.openoffice.xmerge.converter.xml.sxc.pexcel.Records.formula.FormulaCompiler.infix2 from infix to RPN.}. + */ +public class PrecedenceTable { + public static final int DEFAULT_PRECEDENCE = 0; + public static final int EQNEQ_PRECEDENCE = 1; // =, <> + public static final int GTLTEQ_PRECEDENCE = 1; // >=, <= + public static final int GTLT_PRECEDENCE = 2; // >, < + public static final int ADDOP_PRECEDENCE = 4; // +, - + public static final int MULTOP_PRECEDENCE = 5; // *, / + public static final int FACTOR_PRECEDENCE = 6; // ^ + public static final int CONCAT_PRECEDENCE = 6; // & + public static final int UNARY_PRECEDENCE = 7; // !, Unary +, Unary - + public static final int PAREN_PRECEDENCE = 8; // (, ) + public static final int FUNCTION_PRECEDENCE = 8; + public static final int COMMA_PRECEDENCE = 8; + + private static HashMap map; + static { + map = new HashMap(); + + map.put("%", new Integer(UNARY_PRECEDENCE)); + map.put("+", new Integer(ADDOP_PRECEDENCE)); + map.put("-", new Integer(ADDOP_PRECEDENCE)); + map.put("*", new Integer(MULTOP_PRECEDENCE)); + map.put("/", new Integer(MULTOP_PRECEDENCE)); + map.put("(", new Integer(PAREN_PRECEDENCE)); + map.put(")", new Integer(PAREN_PRECEDENCE)); + map.put(",", new Integer(COMMA_PRECEDENCE)); + map.put(">", new Integer(GTLT_PRECEDENCE)); + map.put("<", new Integer(GTLT_PRECEDENCE)); + map.put("=", new Integer(EQNEQ_PRECEDENCE)); + map.put("&", new Integer(CONCAT_PRECEDENCE)); + map.put("^", new Integer(FACTOR_PRECEDENCE)); + map.put(">=", new Integer(GTLTEQ_PRECEDENCE)); + map.put("<=", new Integer(GTLTEQ_PRECEDENCE)); + map.put("<>", new Integer(EQNEQ_PRECEDENCE)); + map.put("FUNCTION", new Integer(FUNCTION_PRECEDENCE)); + } + + /** + * Retrieve the precedence value for a given operator. + * @param op Look up the precedence for this operator + * @return an integer representing the integer value of the operator + */ + public static int getPrecedence(String op) { + Object obj = map.get(op); + if (obj == null) { + return DEFAULT_PRECEDENCE; + } + return ((Integer)obj).intValue(); + } +} |