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();
+ }
+ }
+
}
projects / org.ibex.classgen.git / blobdiff