001: /*
002: * $Id: NotInFunction.java,v 1.9 2005/12/20 18:32:28 ahimanikya Exp $
003: * =======================================================================
004: * Copyright (c) 2003-2005 Axion Development Team. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above
011: * copyright notice, this list of conditions and the following
012: * disclaimer.
013: *
014: * 2. Redistributions in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * 3. The names "Tigris", "Axion", nor the names of its contributors may
020: * not be used to endorse or promote products derived from this
021: * software without specific prior written permission.
022: *
023: * 4. Products derived from this software may not be called "Axion", nor
024: * may "Tigris" or "Axion" appear in their names without specific prior
025: * written permission.
026: *
027: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
028: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
029: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
030: * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
031: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
032: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
033: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
034: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
035: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
036: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
037: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
038: * =======================================================================
039: */
040:
041: package org.axiondb.functions;
042:
043: import org.axiondb.AxionException;
044: import org.axiondb.DataType;
045: import org.axiondb.FunctionFactory;
046: import org.axiondb.Row;
047: import org.axiondb.RowDecorator;
048: import org.axiondb.RowIterator;
049: import org.axiondb.engine.commands.SubSelectCommand;
050: import org.axiondb.types.BooleanType;
051:
052: /**
053: * @author Ahimanikya Satapathy
054: * @author Rupesh Ramachandran
055: * @version $Revision: 1.9 $ $Date: 2005/12/20 18:32:28 $
056: */
057: public class NotInFunction extends BaseFunction implements
058: ScalarFunction, FunctionFactory {
059: public NotInFunction() {
060: super ("NOTIN");
061: }
062:
063: public ConcreteFunction makeNewInstance() {
064: return new NotInFunction();
065: }
066:
067: public DataType getDataType() {
068: return BOOLEAN_TYPE;
069: }
070:
071: public Object evaluate(RowDecorator row) throws AxionException {
072: Object lval = getArgument(0).evaluate(row);
073: DataType ltype = getArgument(0).getDataType();
074:
075: if (getArgument(1) instanceof SubSelectCommand) {
076: SubSelectCommand cmd = (SubSelectCommand) getArgument(1);
077: RowIterator iter = (RowIterator) cmd.evaluate(row);
078: while (iter.hasNext()) {
079: Row rrow = iter.next();
080: for (int i = 0, I = rrow.size(); i < I; i++) {
081: Object rval = rrow.get(i);
082: try {
083: rval = ltype.convert(rval);
084: if (ltype.compare(lval, ltype.convert(rval)) == 0) {
085: return Boolean.FALSE;
086: }
087: } catch (AxionException e) {
088: // ignore, that's OK.
089: }
090: }
091: }
092:
093: } else {
094: for (int i = 1, I = getArgumentCount(); i < I; i++) {
095: Object rval = getArgument(i).evaluate(row);
096: try {
097: rval = ltype.convert(rval);
098: if (ltype.compare(lval, ltype.convert(rval)) == 0) {
099: return Boolean.FALSE;
100: }
101: } catch (AxionException e) {
102: // ignore, that's OK.
103: }
104: }
105: }
106:
107: return Boolean.TRUE;
108: }
109:
110: public boolean isValid() {
111: return (getArgumentCount() >= 1);
112: }
113:
114: private static final DataType BOOLEAN_TYPE = new BooleanType();
115: }
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