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 Software Foundation, Inc.
023: * 59 Temple Place, Suite 330
024: * Boston, MA 02111-1307 USA
025: *
026: * @author Scott Ferguson
027: */
028:
029: package com.caucho.amber.expr;
030:
031: import com.caucho.amber.field.AmberField;
032: import com.caucho.amber.query.FromItem;
033: import com.caucho.amber.query.QueryParseException;
034: import com.caucho.amber.query.QueryParser;
035: import com.caucho.amber.type.EntityType;
036: import com.caucho.util.L10N;
037:
038: /**
039: * Represents from-item table.
040: */
041: public class FromIdSchemaExpr extends SchemaExpr {
042: private static final L10N L = new L10N(FromIdSchemaExpr.class);
043:
044: private IdExpr _id;
045:
046: /**
047: * Creates the table id expr.
048: */
049: public FromIdSchemaExpr(IdExpr id) {
050: _id = id;
051: }
052:
053: /**
054: * Returns the tail name.
055: */
056: public String getTailName() {
057: return _id.getId();
058: }
059:
060: /**
061: * Creates a field-based schema.
062: */
063: public SchemaExpr createField(QueryParser parser, String name)
064: throws QueryParseException {
065: EntityType type = _id.getTargetType();
066:
067: AmberField field = type.getField(name);
068:
069: if (field == null)
070: throw parser.error(L.l("{0}: '{1}' is an unknown field.",
071: type.getBeanClass().getName(), name));
072:
073: AmberExpr fieldExpr = _id.createField(parser, name);
074:
075: if (fieldExpr instanceof ManyToOneExpr)
076: return new ManyToOneSchemaExpr((ManyToOneExpr) fieldExpr,
077: name);
078:
079: /*
080: if (fieldExpr instanceof ManyToManyExpr)
081: return new ManyToManySchemaExpr((ManyToManyExpr) fieldExpr);
082: */
083:
084: if (fieldExpr instanceof OneToManyExpr)
085: return new OneToManySchemaExpr((OneToManyExpr) fieldExpr);
086:
087: if (fieldExpr instanceof DependentEntityOneToOneExpr)
088: return new OneToOneSchemaExpr(
089: (DependentEntityOneToOneExpr) fieldExpr, name);
090:
091: if (fieldExpr instanceof EmbeddedExpr)
092: return new EmbeddedSchemaExpr((EmbeddedExpr) fieldExpr,
093: name);
094:
095: throw parser
096: .error(L
097: .l(
098: "{0}: '{1}' must be a collection or one-to-one relationship.",
099: type.getBeanClass().getName(), name));
100: }
101:
102: /**
103: * Adds the from item.
104: */
105: public FromItem addFromItem(QueryParser parser, String id)
106: throws QueryParseException {
107: return parser.addFromItem(_id.getTargetType().getTable(), id);
108: }
109: }
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