|
1
56 package org.objectstyle.cayenne.query;
57
58 import java.util.Collections  ;
59 import java.util.Map ;
60
61 import org.apache.commons.lang.builder.ToStringBuilder;
62 import org.objectstyle.cayenne.CayenneRuntimeException;
63 import org.objectstyle.cayenne.map.EntityResolver;
64 import org.objectstyle.cayenne.util.Util;
65
66
73 public class NamedQuery implements QueryExecutionPlan {
74
75 protected String name;
76 protected Map parameters;
77
78 public NamedQuery(String name) {
79 this(name, null);
80 }
81
82 public NamedQuery(String name, Map parameters) {
83 this.name = name;
84 this.parameters = parameters;
85 }
86
87
90 public NamedQuery(String name, String [] keys, Object [] values) {
91 this.name = name;
92 this.parameters = Util.toMap(keys, values);
93 }
94
95 public String getName() {
96 return name;
97 }
98
99 public void setName(String name) {
100 this.name = name;
101 }
102
103
109 public Query resolve(EntityResolver resolver) {
110 Query substituteQuery = substituteQuery(resolver);
111
112 if (substituteQuery == null) {
113 throw new CayenneRuntimeException("Can't find named query for name '"
114 + getName()
115 + "'");
116 }
117
118 return substituteQuery;
119 }
120
121
124 public void route(QueryRouter router, EntityResolver resolver) {
125 throw new CayenneRuntimeException(this
126 + " doesn't support its own routing. "
127 + "It should've been delegated to another "
128 + "query during resolution phase.");
129 }
130
131
135 public SQLAction createSQLAction(SQLActionVisitor visitor) {
136 throw new CayenneRuntimeException(this
137 + " doesn't support its own sql actions. "
138 + "It should've been delegated to another "
139 + "query during resolution phase.");
140 }
141
142
145 protected Query substituteQuery(EntityResolver resolver) {
146 Query query = resolver.lookupQuery(getName());
147
148 if(query instanceof ParameterizedQuery) {
149 Map parameters = (this.parameters != null) ? this.parameters : Collections.EMPTY_MAP;
151 query = ((ParameterizedQuery) query).createQuery(parameters);
152 }
153
154 return query;
155 }
156
157 public String toString() {
158 return new ToStringBuilder(this).append("name", name).toString();
159 }
160 }
161 |
Popular Tags |
Java API By Example, From Geeks To Geeks.