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15 * accompanied this code).
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24 */
25
26package com.sun.jdi;
27
28/**
29 * The mirror for a type in the target VM.
30 * This interface is the root of a type hierarchy encompassing primitive
31 * types and reference types.
32 * <P>
33 * A Type may be used to represent a run-time type:
34 * <BLOCKQUOTE>
35 *   {@link Value}.type()
36 * </BLOCKQUOTE>
37 * or a compile-time type:
38 * <BLOCKQUOTE>
39 *  {@link Field#type()} <BR>
40 *  {@link Method#returnType()} <BR>
41 *  {@link Method#argumentTypes()} <BR>
42 *  {@link LocalVariable#type()} <BR>
43 *  {@link ArrayType#componentType()}
44 * </BLOCKQUOTE>
45 * <P>
46 * The following tables illustrate which subinterfaces of Type
47 * are used to mirror types in the target VM --
48 * <TABLE class="plain">
49 * <CAPTION>Subinterfaces of {@link PrimitiveType}</CAPTION>
50 * <THEAD style="background-color:#EEEEFF; text-align:left">
51 * <TR>
52 *   <TH scope="col" style="width:25em">Type declared in target as</TH>
53 *   <TH scope="col" style="width:20em">Is mirrored as an instance of</TH>
54 * </THEAD>
55 * <TBODY style="text-align:left">
56 * <TR>
57 *   <TH scope="row"><CODE>boolean</CODE></TH>
58 *   <TD> {@link BooleanType}</TD>
59 * <TR>
60 *   <TH scope="row"><CODE>byte</CODE></TH>
61 *   <TD>{@link ByteType}</TD>
62 * <TR>
63 *   <TH scope="row"><CODE>char</CODE></TH>
64 *   <TD>{@link CharType}</TD>
65 * <TR>
66 *   <TH scope="row"><CODE>double</CODE></TH>
67 *   <TD>{@link DoubleType}</TD>
68 * <TR>
69 *   <TH scope="row"><CODE>float</CODE></TH>
70 *   <TD>{@link FloatType}</TD>
71 * <TR>
72 *   <TH scope="row"><CODE>int</CODE></TH>
73 *   <TD>{@link IntegerType}</TD>
74 * <TR>
75 *   <TH scope="row"><CODE>long</CODE></TH>
76 *   <TD>{@link LongType}</TD>
77 * <TR>
78 *   <TH scope="row"><CODE>short</CODE></TH>
79 *   <TD>{@link ShortType}</TD>
80 * <TR>
81 *   <TH scope="row"><CODE>void</CODE></TH>
82 *   <TD>{@link VoidType}</TD>
83 * </TBODY>
84 * </TABLE>
85 *
86 * <TABLE class="plain">
87 * <CAPTION>Subinterfaces of {@link ReferenceType}</CAPTION>
88 * <THEAD style="background-color:#EEEEFF; text-align:left">
89 * <TR>
90 *   <TH scope="col" style="width:15em">Type declared in target as</TH>
91 *   <TH scope="col" style="width:10em">For example</TH>
92 *   <TH scope="col" style="width:20em">Is mirrored as an instance of</TH>
93 * </THEAD>
94 * <TBODY style="text-align:left">
95 * <TR>
96 *   <TH scope="row"><I>a class</I></TH>
97 *   <TH scope="row"><CODE>Date</CODE></TH>
98 *   <TD>{@link ClassType}</TD>
99 * <TR>
100 *   <TH scope="row"><I>an interface</I></TH>
101 *   <TH scope="row"><CODE>Runnable</CODE></TH>
102 *   <TD>{@link InterfaceType}</TD>
103 * <TR>
104 *   <TH scope="row" rowspan="4"><I>an array</I></TH>
105 *   <TH scope="row"><i>(any)</i></TH>
106 *   <TD>{@link ArrayType}</TD>
107 * <TR>
108 *   <!--<TH scope="row"><I>an array</I></TH>-->
109 *   <TH scope="row"><CODE>int[]</CODE></TH>
110 *   <TD>{@link ArrayType} whose
111 *         {@link ArrayType#componentType() componentType()} is
112 *         {@link IntegerType}</TD>
113 * <TR>
114 *   <!--<TH scope="row"><I>an array</I></TH>-->
115 *   <TH scope="row"><CODE>Date[]</CODE></TH>
116 *   <TD>{@link ArrayType} whose
117 *         {@link ArrayType#componentType() componentType()} is
118 *         {@link ClassType}</TD>
119 * <TR>
120 *   <!--<TH scope="row"><I>an array</I></TH>-->
121 *   <TH scope="row"><CODE>Runnable[]</CODE></TH>
122 *   <TD>{@link ArrayType} whose
123 *         {@link ArrayType#componentType() componentType()} is
124 *         {@link InterfaceType}</TD>
125 * </TBODY>
126 * </TABLE>
127 *
128 * @see PrimitiveType Subinterface PrimitiveType
129 * @see ReferenceType Subinterface ReferenceType
130 * @see Value Value - for relationship between Type and Value
131 * @see Field#type() Field.type() - for usage examples
132 *
133 * @author Robert Field
134 * @author Gordon Hirsch
135 * @author James McIlree
136 * @since  1.3
137 */
138public interface Type extends Mirror {
139
140    /**
141     * Returns the JNI-style signature for this type.
142     * <p>
143     * For primitive classes
144     * the returned signature is the signature of the corresponding primitive
145     * type; for example, "I" is returned as the signature of the class
146     * represented by {@link java.lang.Integer#TYPE}.
147     *
148     * @see <a href="doc-files/signature.html">Type Signatures</a>
149     * @return the string containing the type signature.
150     */
151    String signature();
152
153    /**
154     * @return a text representation of this type.
155     */
156    String name();
157}
158