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1 package org.hibernate.type;
3
4 import java.io.Serializable  ;
5 import java.sql.Clob ;
6 import java.sql.PreparedStatement ;
7 import java.sql.ResultSet ;
8 import java.sql.SQLException ;
9 import java.sql.Types ;
10 import java.util.Map ;
11
12 import org.dom4j.Node;
13 import org.hibernate.EntityMode;
14 import org.hibernate.Hibernate;
15 import org.hibernate.HibernateException;
16 import org.hibernate.MappingException;
17 import org.hibernate.engine.Mapping;
18 import org.hibernate.engine.SessionFactoryImplementor;
19 import org.hibernate.engine.SessionImplementor;
20 import org.hibernate.lob.ClobImpl;
21 import org.hibernate.lob.SerializableClob;
22 import org.hibernate.util.ArrayHelper;
23
24
28 public class ClobType extends AbstractType {
29
30 public void set(PreparedStatement st, Object value, int index, SessionImplementor session)
31 throws HibernateException, SQLException {
32
33 if (value==null) {
34 st.setNull(index, Types.CLOB);
35 }
36 else {
37
38 if (value instanceof SerializableClob) {
39 value = ( (SerializableClob) value ).getWrappedClob();
40 }
41
42 final boolean useReader = session.getFactory().getDialect().useInputStreamToInsertBlob() &&
43 (value instanceof ClobImpl);
44
45 if ( useReader ) {
46 ClobImpl clob = (ClobImpl) value;
47 st.setCharacterStream( index, clob.getCharacterStream(), (int) clob.length() );
48 }
49 else {
50 st.setClob(index, (Clob ) value);
51 }
52
53 }
54
55 }
56
57 public Object get(ResultSet rs, String name) throws HibernateException, SQLException {
58 Clob value = rs.getClob(name);
59 return rs.wasNull() ? null : new SerializableClob(value);
60 }
61
62 public Class getReturnedClass() {
63 return Clob .class;
64 }
65
66 public boolean isEqual(Object x, Object y, EntityMode entityMode) {
67 return x == y;
68 }
69
70 public int getHashCode(Object x, EntityMode entityMode) {
71 return System.identityHashCode(x);
72 }
73
74 public int compare(Object x, Object y, EntityMode entityMode) {
75 return 0; }
77
78 public String getName() {
79 return "clob";
80 }
81
82 public Serializable disassemble(Object value, SessionImplementor session, Object owner)
83 throws HibernateException {
84 throw new UnsupportedOperationException ("Clobs are not cacheable");
85 }
86
87 public Object deepCopy(Object value, EntityMode entityMode, SessionFactoryImplementor factory) {
88 return value;
89 }
90
91 public Object fromXMLNode(Node xml, Mapping factory) {
92 return Hibernate.createClob( xml.getText() );
93 }
94
95 public int getColumnSpan(Mapping mapping) {
96 return 1;
97 }
98
99 public boolean isMutable() {
100 return false;
101 }
102
103 public Object nullSafeGet(ResultSet rs, String name,
104 SessionImplementor session, Object owner)
105 throws HibernateException, SQLException {
106 return get(rs, name);
107 }
108
109 public Object nullSafeGet(ResultSet rs, String [] names,
110 SessionImplementor session, Object owner)
111 throws HibernateException, SQLException {
112 return get( rs, names[0] );
113 }
114
115 public void nullSafeSet(PreparedStatement st, Object value, int index,
116 boolean[] settable, SessionImplementor session)
117 throws HibernateException, SQLException {
118 if ( settable[0] ) set(st, value, index, session);
119 }
120
121 public void nullSafeSet(PreparedStatement st, Object value, int index,
122 SessionImplementor session) throws HibernateException, SQLException {
123 set(st, value, index, session);
124 }
125
126 public Object replace(Object original, Object target,
127 SessionImplementor session, Object owner, Map copyCache)
128 throws HibernateException {
129 return target;
131 }
132
133 public int[] sqlTypes(Mapping mapping) throws MappingException {
134 return new int[] { Types.CLOB };
135 }
136
137 public void setToXMLNode(Node node, Object value, SessionFactoryImplementor factory) {
138 if (value!=null) {
139 Clob clob = (Clob ) value;
140 try {
141 int len = (int) clob.length();
142 node.setText( clob.getSubString(0, len) );
143 }
144 catch (SQLException sqle) {
145 throw new HibernateException("could not read XML from Clob", sqle);
146 }
147 }
148 }
149
150 public String toLoggableString(Object value, SessionFactoryImplementor factory)
151 throws HibernateException {
152 return value==null ? "null" : value.toString();
153 }
154
155 public boolean[] toColumnNullness(Object value, Mapping mapping) {
156 return value==null ? ArrayHelper.FALSE : ArrayHelper.TRUE;
157 }
158
159 }
160
161
162
163
164
165
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