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1
56
57 package org.objectstyle.cayenne.access.trans;
58
59 import java.util.Collections  ;
60 import java.util.HashMap ;
61 import java.util.Iterator ;
62 import java.util.Map ;
63
64 import org.objectstyle.cayenne.CayenneRuntimeException;
65 import org.objectstyle.cayenne.DataObject;
66 import org.objectstyle.cayenne.ObjectId;
67 import org.objectstyle.cayenne.exp.Expression;
68 import org.objectstyle.cayenne.map.DbAttribute;
69 import org.objectstyle.cayenne.map.DbEntity;
70 import org.objectstyle.cayenne.map.DbJoin;
71 import org.objectstyle.cayenne.map.DbRelationship;
72
73
76 public class DataObjectMatchTranslator {
77 protected Map attributes;
78 protected Map values;
79 protected String operation;
80 protected Expression expression;
81 protected DbRelationship relationship;
82
83 public Expression getExpression() {
84 return expression;
85 }
86
87 public void setExpression(Expression expression) {
88 this.expression = expression;
89 }
90
91 public void reset() {
92 attributes = null;
93 values = null;
94 operation = null;
95 expression = null;
96 relationship = null;
97 }
98
99
103 public void setRelationship(DbRelationship rel) {
104 this.relationship = rel;
105 attributes = new HashMap (rel.getJoins().size() * 2);
106
107 if (rel.isToMany()) {
108
109 DbEntity ent = (DbEntity) rel.getTargetEntity();
111 Iterator pk = ent.getPrimaryKey().iterator();
112
113 while (pk.hasNext()) {
115 DbAttribute pkAttr = (DbAttribute) pk.next();
116 attributes.put(pkAttr.getName(), pkAttr);
117 }
118 } else {
119
120 Iterator joins = rel.getJoins().iterator();
122 while (joins.hasNext()) {
123 DbJoin join = (DbJoin) joins.next();
124
125 attributes.put(join.getTargetName(), join.getSource());
127 }
128 }
129 }
130
131 public void setDataObject(DataObject obj) {
132 if (obj == null) {
133 values = Collections.EMPTY_MAP;
134 return;
135 }
136
137 ObjectId id = obj.getObjectId();
138
139 if (id == null) {
140 throw new CayenneRuntimeException("Null ObjectId, probably an attempt to use TRANSIENT object as a query parameter.");
141 } else if (id.isTemporary()) {
142 throw new CayenneRuntimeException("Temporary id, probably an attempt to use NEW object as a query parameter.");
143 } else {
144 values = id.getIdSnapshot();
145 }
146 }
147
148 public Iterator keys() {
149 if (attributes == null) {
150 throw new IllegalStateException (
151 "An attempt to use uninitialized DataObjectMatchTranslator: "
152 + "[attributes: null, values: "
153 + values
154 + "]");
155 }
156
157 return attributes.keySet().iterator();
158 }
159
160 public DbRelationship getRelationship() {
161 return relationship;
162 }
163
164 public DbAttribute getAttribute(String key) {
165 return (DbAttribute) attributes.get(key);
166 }
167
168 public Object getValue(String key) {
169 return values.get(key);
170 }
171
172 public void setOperation(String operation) {
173 this.operation = operation;
174 }
175
176 public String getOperation() {
177 return operation;
178 }
179 }
180 |
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