X-Git-Url: http://git.megacz.com/?p=org.ibex.classgen.git;a=blobdiff_plain;f=src%2Forg%2Fibex%2Fclassgen%2FType.java;h=8d91aeb0f02f34a207cc1400e693723ec782031a;hp=87705b4058904dd333df6bb16f467398096fdff5;hb=61c79c5fd88e1017446c804adcafde230f4d90e8;hpb=cb0bae954e7dd0067e77c436c78ee19ace52d9e3

diff --git a/src/org/ibex/classgen/Type.java b/src/org/ibex/classgen/Type.java
index 87705b4..8d91aeb 100644
--- a/src/org/ibex/classgen/Type.java
+++ b/src/org/ibex/classgen/Type.java
@@ -5,45 +5,117 @@ import java.util.StringTokenizer;
 public class Type {
     public static final Type VOID = new Type("V");
     public static final Type INT = new Type("I");
-    public static final Type STRING = new Type.Object("java.lang.String");
-    public static final Type[] NO_ARGS = new Type[0];
+    public static final Type LONG = new Type("J");
+    public static final Type BOOLEAN = new Type("Z");
+    public static final Type DOUBLE = new Type("D");
+    public static final Type FLOAT = new Type("F");
+    public static final Type BYTE = new Type("B");
+    public static final Type CHAR = new Type("C");
+    public static final Type SHORT = new Type("S");
     
-    String descriptor;
+    public static final Type.Object OBJECT = new Type.Object("java.lang.Object");
+    public static final Type.Object STRING = new Type.Object("java.lang.String");
+    public static final Type.Object STRINGBUFFER = new Type.Object("java.lang.StringBuffer");
+    public static final Type.Object INTEGER_OBJECT = new Type.Object("java.lang.Integer");
+    public static final Type.Object DOUBLE_OBJECT = new Type.Object("java.lang.Double");
+    public static final Type.Object FLOAT_OBJECT = new Type.Object("java.lang.Float");
     
-    Type() { }
-    Type(String descriptor) { this.descriptor = descriptor; }
+    /** A zero element Type[] array (can be passed as the "args" param when a method takes no arguments */
+    public static final Type[] NO_ARGS = new Type[0];
     
-    public final String getDescriptor() { return descriptor; }
-    public int hashCode() { return descriptor.hashCode(); }
-    public boolean equals(Object o) { return o instanceof Type && ((Type)o).descriptor.equals(descriptor); }
+    final String descriptor;
+
+    public String humanReadable() {
+        if(descriptor.equals("V")) return "void";
+        if(descriptor.equals("I")) return "int";
+        if(descriptor.equals("J")) return "long";
+        if(descriptor.equals("Z")) return "boolean";
+        if(descriptor.equals("D")) return "double";
+        if(descriptor.equals("F")) return "float";
+        if(descriptor.equals("B")) return "byte";
+        if(descriptor.equals("C")) return "char";
+        if(descriptor.equals("S")) return "short";
+        throw new Error("confounded by Type("+descriptor+")");
+    }
+
+    protected Type(String descriptor) { this.descriptor = descriptor; }
     
-    public static Type arrayType(Type base) { return arrayType(base,1); }
-    public static Type arrayType(Type base, int dim) {
-        StringBuffer sb = new StringBuffer(base.descriptor.length() + dim);
-        for(int i=0;i<dim;i++) sb.append("[");
-        sb.append(base.descriptor);
-        return new Type(sb.toString());
+    public static Type fromDescriptor(String descriptor) {
+        if(descriptor.equals("V")) return VOID;
+        if(descriptor.equals("I")) return INT;
+        if(descriptor.equals("J")) return LONG;
+        if(descriptor.equals("Z")) return BOOLEAN;
+        if(descriptor.equals("D")) return DOUBLE;
+        if(descriptor.equals("F")) return FLOAT;
+        if(descriptor.equals("B")) return BYTE;
+        if(descriptor.equals("C")) return CHAR;
+        if(descriptor.equals("S")) return SHORT;
+        if(descriptor.endsWith("[")) return new Type.Array(fromDescriptor(descriptor.substring(0, descriptor.indexOf('['))),
+                                                           descriptor.length() - descriptor.indexOf('['));
+        return new Type.Object(descriptor);
     }
+        
+    /** Returns the Java descriptor string for this object ("I", or "Ljava/lang/String", "[[J", etc */
+    public final String getDescriptor() { return descriptor; }
+    public int hashCode() { return descriptor.hashCode(); }
+    public boolean equals(java.lang.Object o) { return o instanceof Type && ((Type)o).descriptor.equals(descriptor); }
     
+    public String toString() { return getDescriptor(); }
+    public Type.Object asObject() { throw new RuntimeException("attempted to use "+this+" as a Type.Object, which it is not"); }
+    public Type.Array asArray() { throw new RuntimeException("attempted to use "+this+" as a Type.Array, which it is not"); }
+    public Type.Array makeArray() { return new Type.Array(this); }
+    public Type.Array makeArray(int dim) { return new Type.Array(this, dim); }
+    public boolean isObject() { return false; }
+    public boolean isArray() { return false; }
+
+    /** Class representing Object types (any non-primitive type) */
     public static class Object extends Type {
-        public Object(String s) {
-            if(!s.startsWith("L") || !s.endsWith(";")) s = "L" + s.replace('.','/') + ";";
-            if(!validDescriptorString(s)) throw new IllegalArgumentException("invalid descriptor string");
-            descriptor = s;
+        /** Create an Type.Object instance for the specified string. <i>s</i> can be a string in the form
+            "java.lang.String", "java/lang/String", or "Ljava/lang/String;".
+            @param s The type */
+        protected Object(String s) { super(_initHelper(s)); }
+        public Type.Object asObject() { return this; }
+        public boolean isObject() { return true; }
+        public String humanReadable() { return internalForm().replace('/', '.'); }
+        public String getShortName() {
+            String hr = humanReadable();
+            return hr.substring(hr.lastIndexOf('.')+1);
         }
-        
-        public String[] components() {
-            StringTokenizer st = new StringTokenizer(descriptor.substring(1,descriptor.length()-1),"/");
+
+        private static String _initHelper(String s) {
+            if(!s.startsWith("L") || !s.endsWith(";")) s = "L" + s.replace('.', '/') + ";";
+            return s;
+        }
+
+        String[] components() {
+            StringTokenizer st = new StringTokenizer(descriptor.substring(1, descriptor.length()-1), "/");
             String[] a = new String[st.countTokens()];
             for(int i=0;st.hasMoreTokens();i++) a[i] = st.nextToken();
             return a;
         }
-        
-        public String internalForm() { return descriptor.substring(1,descriptor.length()-1); }
-        
-        // FEATURE: Do a proper check here (invalid chars, etc)
-        public boolean validDescriptorString(String s) {
-            return s.startsWith("L") && s.endsWith(";");
-        }
+       
+        String internalForm() { return descriptor.substring(1, descriptor.length()-1); }
     }    
+
+    public static class Array extends Object {
+        private int dim;
+        protected Array(Type t) { super(_initHelper(t, 1)); this.dim = 1; }
+        protected Array(Type t, int dim) { super(_initHelper(t, dim)); this.dim = dim; }
+        public Type.Array asArray() { return this; }
+        public boolean isArray() { return true; }
+        public String humanReadable() { 
+            String ret = super.internalForm().replace('/', '.');
+            for(int i=0; i<dim; i++) ret += "[]";
+            return ret;
+        }
+        String internalForm() { throw new Error("Type.Array does not have an internalForm()"); }
+        String[] components() { throw new Error("Type.Array does not have components()"); }
+        private static String _initHelper(Type t, int dim) {
+            StringBuffer sb = new StringBuffer(t.descriptor.length() + dim);
+            for(int i=0;i<dim;i++) sb.append("[");
+            sb.append(t.descriptor);
+            return sb.toString();
+        }
+    }
+
 }