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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: 1.12 $
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 final private boolean hasDefaultValue;
70
71 public Parameter(String name) {
72 this.name = null;
73 this.hasDefaultValue = false;
74 this.type = "java.lang.Object";
75 this.dynamicType = true;
76 }
77
78 public Parameter(String type, String name) {
79 this.name = MethodNode.ensureJavaTypeNameSyntax(name);
80 this.type = type;
81 this.hasDefaultValue = false;
82 if (type == null || type.length() == 0) {
83 this.type = "java.lang.Object";
84 this.dynamicType = true;
85 }
86 }
87
88 public Parameter(String type, String name, Expression defaultValue) {
89 this.name = MethodNode.ensureJavaTypeNameSyntax(name);
90 this.type = type;
91 this.defaultValue = defaultValue;
92 this.hasDefaultValue = true;
93 if (type == null || type.length() == 0) {
94 this.type = "java.lang.Object";
95 this.dynamicType = true;
96 }
97 }
98
99 public String toString() {
100 return super.toString() + "[name:" + name + ((type == null) ? "" : " type: " + type) + ", hasDefaultValue: " + this.hasDefaultValue() + "]";
101 }
102
103 public String getName() {
104 return name;
105 }
106
107 public String getType() {
108 return type;
109 }
110
111 public void setType(String type) {
112 this.type = type;
113 }
114
115 public boolean isDynamicType() {
116 return dynamicType;
117 }
118
119 public boolean hasDefaultValue() {
120 return this.hasDefaultValue;
121 }
122
123 /***
124 * @return the default value expression for this parameter or null if
125 * no default value is specified
126 */
127 public Expression getDefaultValue() {
128 return defaultValue;
129 }
130
131 public void makeReference() {
132 realType = type;
133 type = Reference.class.getName();
134 }
135
136 /***
137 * @return the real logical type if a dereference is being made
138 * (e.g. to share variables across closure scopes)
139 */
140 public String getRealType() {
141 return realType;
142 }
143
144 }