1 // Copyright 2006 all rights reserved; see LICENSE file for BSD-style license
3 package edu.berkeley.sbp.bind;
5 import edu.berkeley.sbp.util.*;
6 import edu.berkeley.sbp.*;
7 import edu.berkeley.sbp.chr.*;
8 import edu.berkeley.sbp.bind.*;
10 import java.lang.annotation.*;
11 import java.lang.reflect.*;
13 import java.security.*;
14 import static edu.berkeley.sbp.util.Reflection.*;
16 public abstract class Bindable implements ToJava {
18 public abstract String getSimpleName();
19 public abstract String toString();
20 public abstract <A extends Annotation> A getAnnotation(Class<A> c);
21 public abstract Object impose(Object[] fields);
22 public boolean isAnnotationPresent(Class<? extends Annotation> c) { return getAnnotation(c) != null; }
24 public abstract Annotation[][] getArgAnnotations();
25 public abstract String[] getArgNames();
26 public abstract Class[] getArgTypes();
28 public Binding createBinding() { return new SimpleBinding(); }
29 public Binding createBinding(final int[] map) { return new SimpleBinding(map); }
30 public Binding createBinding(final int[] map, Object prepend) { return new SimpleBinding(map, prepend); }
33 public static Bindable create(Object o) {
34 if (o instanceof Class) return new BindableClass((Class)o);
35 if (o instanceof Method) return new BindableMethod((Method)o);
36 if (o instanceof Constructor) return new BindableConstructor((Constructor)o);
40 // Subclasses //////////////////////////////////////////////////////////////////////////////
42 private static class BindableMethod extends Bindable {
43 private final Method _method;
44 public String toString() { return "BindableMethod["+_method+"]"; }
45 public BindableMethod(Method _method) { this._method = _method; }
46 public String getSimpleName() { return _method.getName(); }
47 public <A extends Annotation> A getAnnotation(final Class<A> c) { return _method.getAnnotation(c); }
48 public Object impose(Object[] fields) { return Reflection.impose(_method, fields); }
49 public Annotation[][] getArgAnnotations() { return _method.getParameterAnnotations(); }
50 public String[] getArgNames() { return new String[_method.getParameterTypes().length]; }
51 public Class[] getArgTypes() { return _method.getParameterTypes(); }
52 public void toJava(StringBuffer sb) {
53 sb.append("Bindable.create(");
54 sb.append(_method.getDeclaringClass().getName().replace('$','.'));
55 sb.append(".class.getMethod(\"");
56 sb.append(_method.getName());
58 appendClassArray(sb, _method.getParameterTypes());
63 private static class BindableConstructor extends Bindable {
64 private final Constructor _constructor;
65 public String toString() { return "BindableConstructor["+_constructor+"]"; }
66 public BindableConstructor(Constructor _constructor) { this._constructor = _constructor; }
67 public String getSimpleName() { return _constructor.getDeclaringClass().getSimpleName(); }
68 public <A extends Annotation> A getAnnotation(Class<A> c) { return _constructor.getAnnotation(c); }
69 public Object impose(Object[] fields) { return Reflection.impose(_constructor, fields); }
70 public Annotation[][] getArgAnnotations() { return _constructor.getParameterAnnotations(); }
71 public String[] getArgNames() { return new String[_constructor.getParameterTypes().length]; }
72 public Class[] getArgTypes() { return _constructor.getParameterTypes(); }
73 public void toJava(StringBuffer sb) {
74 sb.append("Bindable.create(");
75 sb.append(_constructor.getDeclaringClass().getName().replace('$','.'));
76 sb.append(".class.getConstructor(");
77 appendClassArray(sb, _constructor.getParameterTypes());
82 private static class BindableClass extends Bindable {
83 private final Class _class;
84 public String toString() { return "BindableClass["+_class+"]"; }
85 public BindableClass(Class _class) { this._class = _class; }
86 public String getSimpleName() { return _class.getSimpleName(); }
87 public <A extends Annotation> A getAnnotation(Class<A> c) { return (A)_class.getAnnotation(c); }
88 public Object impose(Object[] fields) { return Reflection.impose(_class, fields); }
89 public Annotation[][] getArgAnnotations() {
90 Field[] fields = _class.getFields();
91 Annotation[][] ret = new Annotation[fields.length][];
92 for(int i=0; i<fields.length; i++)
93 ret[i] = fields[i].getAnnotations();
96 public String[] getArgNames() {
97 Field[] fields = _class.getFields();
98 String[] ret = new String[fields.length];
99 for(int i=0; i<fields.length; i++)
100 ret[i] = fields[i].getName();
103 public Class[] getArgTypes() {
104 Field[] fields = _class.getFields();
105 Class[] ret = new Class[fields.length];
106 for(int i=0; i<fields.length; i++)
107 ret[i] = fields[i].getType();
110 public void toJava(StringBuffer sb) {
111 sb.append("Bindable.create(");
112 sb.append(_class.getName().replace('$','.'));
113 sb.append(".class)");
118 // Helpers //////////////////////////////////////////////////////////////////////////////
120 private static void appendClassArray(StringBuffer sb, Class[] c) {
121 sb.append("new Class[] {");
122 for(int i=0; i<c.length; i++) {
123 sb.append(makeClass(c[i]));
131 private static String makeClass(Class c) {
132 if (!c.isArray()) return c.getName().replace('$','.');
133 return makeClass(c.getComponentType())+"[]";
137 // Creating Bindings //////////////////////////////////////////////////////////////////////////////
139 private class SimpleBinding implements Binding, ToJava {
140 private int[] map = null;
141 private Object prepend = null;
142 public SimpleBinding() { }
143 public SimpleBinding(int[] map) { this.map = map; }
144 public SimpleBinding(int[] map, Object prepend) { this.map = map; this.prepend = prepend; }
146 public Object invoke(Object[] o) {
147 if (map==null) return impose(o);
149 for(int i=0; i<map.length; i++) max = Math.max(map[i], max);
150 Object[] o2 = new Object[max+1];
151 for(int i=0; i<o.length; i++) o2[map[i]+(prepend==null?0:1)] = o[i];
152 if (prepend != null) o2[0] = prepend;
156 public void toJava(StringBuffer sb) {
157 Bindable.this.toJava(sb);
158 sb.append(".createBinding(");
160 sb.append("new int[] {");
161 for(int i=0; i<map.length; i++) {
163 if (i<map.length-1) sb.append(",");