1 package edu.berkeley.sbp.bind;
3 import edu.berkeley.sbp.util.*;
4 import edu.berkeley.sbp.*;
5 import edu.berkeley.sbp.chr.*;
6 import edu.berkeley.sbp.bind.*;
8 import java.lang.annotation.*;
9 import java.lang.reflect.*;
11 import static edu.berkeley.sbp.util.Reflection.*;
13 public abstract class Bindable implements ToJava {
15 public abstract String getSimpleName();
16 public abstract String toString();
17 public abstract <A extends Annotation> A getAnnotation(Class<A> c);
18 public abstract Object impose(Object[] fields);
19 public boolean isAnnotationPresent(Class<? extends Annotation> c) { return getAnnotation(c) != null; }
21 public abstract Annotation[][] getArgAnnotations();
22 public abstract String[] getArgNames();
23 public abstract Class[] getArgTypes();
25 public Binding createBinding() { return new SimpleBinding(); }
26 public Binding createBinding(final int[] map) { return new SimpleBinding(map); }
27 public Binding createBinding(final int[] map, Object prepend) { return new SimpleBinding(map, prepend); }
30 public static Bindable create(Object o) {
31 if (o instanceof Class) return new BindableClass((Class)o);
32 if (o instanceof Method) return new BindableMethod((Method)o);
33 if (o instanceof Constructor) return new BindableConstructor((Constructor)o);
37 // Subclasses //////////////////////////////////////////////////////////////////////////////
39 private static class BindableMethod extends Bindable {
40 private final Method _method;
41 public String toString() { return "BindableMethod["+_method+"]"; }
42 public BindableMethod(Method _method) { this._method = _method; }
43 public String getSimpleName() { return _method.getName(); }
44 public <A extends Annotation> A getAnnotation(Class<A> c) { return _method.getAnnotation(c); }
45 public Object impose(Object[] fields) { return Reflection.impose(_method, fields); }
46 public Annotation[][] getArgAnnotations() { return _method.getParameterAnnotations(); }
47 public String[] getArgNames() { return new String[_method.getParameterTypes().length]; }
48 public Class[] getArgTypes() { return _method.getParameterTypes(); }
49 public void toJava(StringBuffer sb) {
50 sb.append("Bindable.create(");
51 sb.append(_method.getDeclaringClass().getName().replace('$','.'));
52 sb.append(".class.getMethod(\"");
53 sb.append(_method.getName());
55 appendClassArray(sb, _method.getParameterTypes());
60 private static class BindableConstructor extends Bindable {
61 private final Constructor _constructor;
62 public String toString() { return "BindableConstructor["+_constructor+"]"; }
63 public BindableConstructor(Constructor _constructor) { this._constructor = _constructor; }
64 public String getSimpleName() { return _constructor.getDeclaringClass().getSimpleName(); }
65 public <A extends Annotation> A getAnnotation(Class<A> c) { return _constructor.getAnnotation(c); }
66 public Object impose(Object[] fields) { return Reflection.impose(_constructor, fields); }
67 public Annotation[][] getArgAnnotations() { return _constructor.getParameterAnnotations(); }
68 public String[] getArgNames() { return new String[_constructor.getParameterTypes().length]; }
69 public Class[] getArgTypes() { return _constructor.getParameterTypes(); }
70 public void toJava(StringBuffer sb) {
71 sb.append("Bindable.create(");
72 sb.append(_constructor.getDeclaringClass().getName().replace('$','.'));
73 sb.append(".class.getConstructor(");
74 appendClassArray(sb, _constructor.getParameterTypes());
79 private static class BindableClass extends Bindable {
80 private final Class _class;
81 public String toString() { return "BindableClass["+_class+"]"; }
82 public BindableClass(Class _class) { this._class = _class; }
83 public String getSimpleName() { return _class.getSimpleName(); }
84 public <A extends Annotation> A getAnnotation(Class<A> c) { return (A)_class.getAnnotation(c); }
85 public Object impose(Object[] fields) { return Reflection.impose(_class, fields); }
86 public Annotation[][] getArgAnnotations() {
87 Field[] fields = _class.getFields();
88 Annotation[][] ret = new Annotation[fields.length][];
89 for(int i=0; i<fields.length; i++)
90 ret[i] = fields[i].getAnnotations();
93 public String[] getArgNames() {
94 Field[] fields = _class.getFields();
95 String[] ret = new String[fields.length];
96 for(int i=0; i<fields.length; i++)
97 ret[i] = fields[i].getName();
100 public Class[] getArgTypes() {
101 Field[] fields = _class.getFields();
102 Class[] ret = new Class[fields.length];
103 for(int i=0; i<fields.length; i++)
104 ret[i] = fields[i].getType();
107 public void toJava(StringBuffer sb) {
108 sb.append("Bindable.create(");
109 sb.append(_class.getName().replace('$','.'));
110 sb.append(".class)");
115 // Helpers //////////////////////////////////////////////////////////////////////////////
117 private static void appendClassArray(StringBuffer sb, Class[] c) {
118 sb.append("new Class[] {");
119 for(int i=0; i<c.length; i++) {
120 sb.append(makeClass(c[i]));
128 private static String makeClass(Class c) {
129 if (!c.isArray()) return c.getName().replace('$','.');
130 return makeClass(c.getComponentType())+"[]";
134 // Creating Bindings //////////////////////////////////////////////////////////////////////////////
136 private class SimpleBinding implements Binding, ToJava {
137 private int[] map = null;
138 private Object prepend = null;
139 public SimpleBinding() { }
140 public SimpleBinding(int[] map) { this.map = map; }
141 public SimpleBinding(int[] map, Object prepend) { this.map = map; this.prepend = prepend; }
143 public Object invoke(Object[] o) {
144 if (map==null) return impose(o);
146 for(int i=0; i<map.length; i++) max = Math.max(map[i], max);
147 Object[] o2 = new Object[max+1];
148 for(int i=0; i<o.length; i++) o2[map[i]+(prepend==null?0:1)] = o[i];
149 if (prepend != null) o2[0] = prepend;
153 public void toJava(StringBuffer sb) {
154 Bindable.this.toJava(sb);
155 sb.append(".createBinding(");
157 sb.append("new int[] {");
158 for(int i=0; i<map.length; i++) {
160 if (i<map.length-1) sb.append(",");