001: /*
002: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: * Free SoftwareFoundation, Inc.
023: * 59 Temple Place, Suite 330
024: * Boston, MA 02111-1307 USA
025: *
026: * @author Scott Ferguson
027: */
028:
029: package com.caucho.ejb.ql;
030:
031: import com.caucho.config.ConfigException;
032: import com.caucho.util.CharBuffer;
033:
034: import java.util.ArrayList;
035:
036: /**
037: * An 'in' expression
038: */
039: class InExpr extends Expr {
040: // value expression
041: private Expr _expr;
042: // args
043: private ArrayList<Expr> _args;
044: // true if this is a negative between
045: private boolean _isNot;
046:
047: /**
048: * Creates an 'in' expression.
049: *
050: * @param expr the value expression
051: * @param args the args
052: * @param isNot if true, this the like is negated
053: */
054: InExpr(Query query, Expr expr, ArrayList<Expr> args, boolean isNot)
055: throws ConfigException {
056: _query = query;
057:
058: _expr = expr;
059: _args = args;
060: _isNot = isNot;
061:
062: evalTypes();
063: }
064:
065: /**
066: * Evaluates the types for the expression
067: */
068: void evalTypes() throws ConfigException {
069: if (getJavaType() != null)
070: return;
071:
072: for (int i = 0; i < _args.size(); i++) {
073: Expr expr = _args.get(i);
074:
075: if (!expr.isString())
076: throw error(L.l(
077: "'IN' literal requires strings at `{0}'", expr));
078: }
079:
080: setJavaType(boolean.class);
081: }
082:
083: /**
084: * Prints the where SQL for this expression
085: *
086: * @param gen the java code generator
087: */
088: void generateWhere(CharBuffer cb) {
089: _expr.generateWhereSubExpr(cb);
090:
091: if (_isNot)
092: cb.append(" NOT ");
093:
094: cb.append(" IN (");
095: for (int i = 0; i < _args.size(); i++) {
096: Expr arg = _args.get(i);
097:
098: if (i != 0)
099: cb.append(", ");
100:
101: arg.generateWhereSubExpr(cb);
102: }
103: cb.append(")");
104: }
105:
106: public String toString() {
107: String str = _expr.toString();
108:
109: if (_isNot)
110: str += " NOT ";
111:
112: str += " IN (";
113: for (int i = 0; i < _args.size(); i++) {
114: if (i != 0)
115: str += ", ";
116:
117: Expr arg = _args.get(i);
118:
119: str += arg;
120: }
121: str += ")";
122:
123: return str;
124: }
125: }
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