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46 package org.codehaus.groovy.ast;
47
48 import groovy.lang.Reference;
49
50 import org.codehaus.groovy.ast.expr.*;
51
52 /***
53 * Represents a parameter on a constructor or method call. The type name is
54 * optional - it should be defaulted to java.lang.Object if unknown.
55 *
56 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
57 * @version $Revision: 1.11 $
58 */
59 public class Parameter {
60
61 public static final Parameter[] EMPTY_ARRAY = {
62 };
63
64 private String type;
65 private String name;
66 private boolean dynamicType;
67 private Expression defaultValue;
68 private String realType;
69
70 public Parameter(String name) {
71 this(null, name);
72 }
73
74 public Parameter(String type, String name) {
75 this(type, name, null);
76 }
77
78 public Parameter(String type, String name, Expression defaultValue) {
79 this.name = MethodNode.ensureJavaTypeNameSyntax(name);
80 this.type = type;
81 this.defaultValue = defaultValue;
82 if (type == null || type.length() == 0) {
83 this.type = "java.lang.Object";
84 this.dynamicType = true;
85 }
86 }
87
88 public String toString() {
89 return super.toString() + "[name:" + name + ((type == null) ? "" : " type: " + type) + "]";
90 }
91
92 public String getName() {
93 return name;
94 }
95
96 public String getType() {
97 return type;
98 }
99
100 public void setType(String type) {
101 this.type = type;
102 }
103
104 public boolean isDynamicType() {
105 return dynamicType;
106 }
107
108 /***
109 * @return the default value expression for this parameter or null if
110 * no default value is specified
111 */
112 public Expression getDefaultValue() {
113 return defaultValue;
114 }
115
116 public void makeReference() {
117 realType = type;
118 type = Reference.class.getName();
119 }
120
121 /***
122 * @return the real logical type if a dereference is being made
123 * (e.g. to share variables across closure scopes)
124 */
125 public String getRealType() {
126 return realType;
127 }
128
129 }