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 static edu.berkeley.sbp.util.Reflection.*;
15 public abstract class Bindable implements ToJava {
17 public abstract String getSimpleName();
18 public abstract String toString();
19 public abstract <A extends Annotation> A getAnnotation(Class<A> c);
20 public abstract Object impose(Object[] fields);
21 public boolean isAnnotationPresent(Class<? extends Annotation> c) { return getAnnotation(c) != null; }
23 public abstract Annotation[][] getArgAnnotations();
24 public abstract String[] getArgNames();
25 public abstract Class[] getArgTypes();
27 public Binding createBinding() { return new SimpleBinding(); }
28 public Binding createBinding(final int[] map) { return new SimpleBinding(map); }
29 public Binding createBinding(final int[] map, Object prepend) { return new SimpleBinding(map, prepend); }
32 public static Bindable create(Object o) {
33 if (o instanceof Class) return new BindableClass((Class)o);
34 if (o instanceof Method) return new BindableMethod((Method)o);
35 if (o instanceof Constructor) return new BindableConstructor((Constructor)o);
39 // Subclasses //////////////////////////////////////////////////////////////////////////////
41 private static class BindableMethod extends Bindable {
42 private final Method _method;
43 public String toString() { return "BindableMethod["+_method+"]"; }
44 public BindableMethod(Method _method) { this._method = _method; }
45 public String getSimpleName() { return _method.getName(); }
46 public <A extends Annotation> A getAnnotation(Class<A> c) { return _method.getAnnotation(c); }
47 public Object impose(Object[] fields) { return Reflection.impose(_method, fields); }
48 public Annotation[][] getArgAnnotations() { return _method.getParameterAnnotations(); }
49 public String[] getArgNames() { return new String[_method.getParameterTypes().length]; }
50 public Class[] getArgTypes() { return _method.getParameterTypes(); }
51 public void toJava(StringBuffer sb) {
52 sb.append("Bindable.create(");
53 sb.append(_method.getDeclaringClass().getName().replace('$','.'));
54 sb.append(".class.getMethod(\"");
55 sb.append(_method.getName());
57 appendClassArray(sb, _method.getParameterTypes());
62 private static class BindableConstructor extends Bindable {
63 private final Constructor _constructor;
64 public String toString() { return "BindableConstructor["+_constructor+"]"; }
65 public BindableConstructor(Constructor _constructor) { this._constructor = _constructor; }
66 public String getSimpleName() { return _constructor.getDeclaringClass().getSimpleName(); }
67 public <A extends Annotation> A getAnnotation(Class<A> c) { return _constructor.getAnnotation(c); }
68 public Object impose(Object[] fields) { return Reflection.impose(_constructor, fields); }
69 public Annotation[][] getArgAnnotations() { return _constructor.getParameterAnnotations(); }
70 public String[] getArgNames() { return new String[_constructor.getParameterTypes().length]; }
71 public Class[] getArgTypes() { return _constructor.getParameterTypes(); }
72 public void toJava(StringBuffer sb) {
73 sb.append("Bindable.create(");
74 sb.append(_constructor.getDeclaringClass().getName().replace('$','.'));
75 sb.append(".class.getConstructor(");
76 appendClassArray(sb, _constructor.getParameterTypes());
81 private static class BindableClass extends Bindable {
82 private final Class _class;
83 public String toString() { return "BindableClass["+_class+"]"; }
84 public BindableClass(Class _class) { this._class = _class; }
85 public String getSimpleName() { return _class.getSimpleName(); }
86 public <A extends Annotation> A getAnnotation(Class<A> c) { return (A)_class.getAnnotation(c); }
87 public Object impose(Object[] fields) { return Reflection.impose(_class, fields); }
88 public Annotation[][] getArgAnnotations() {
89 Field[] fields = _class.getFields();
90 Annotation[][] ret = new Annotation[fields.length][];
91 for(int i=0; i<fields.length; i++)
92 ret[i] = fields[i].getAnnotations();
95 public String[] getArgNames() {
96 Field[] fields = _class.getFields();
97 String[] ret = new String[fields.length];
98 for(int i=0; i<fields.length; i++)
99 ret[i] = fields[i].getName();
102 public Class[] getArgTypes() {
103 Field[] fields = _class.getFields();
104 Class[] ret = new Class[fields.length];
105 for(int i=0; i<fields.length; i++)
106 ret[i] = fields[i].getType();
109 public void toJava(StringBuffer sb) {
110 sb.append("Bindable.create(");
111 sb.append(_class.getName().replace('$','.'));
112 sb.append(".class)");
117 // Helpers //////////////////////////////////////////////////////////////////////////////
119 private static void appendClassArray(StringBuffer sb, Class[] c) {
120 sb.append("new Class[] {");
121 for(int i=0; i<c.length; i++) {
122 sb.append(makeClass(c[i]));
130 private static String makeClass(Class c) {
131 if (!c.isArray()) return c.getName().replace('$','.');
132 return makeClass(c.getComponentType())+"[]";
136 // Creating Bindings //////////////////////////////////////////////////////////////////////////////
138 private class SimpleBinding implements Binding, ToJava {
139 private int[] map = null;
140 private Object prepend = null;
141 public SimpleBinding() { }
142 public SimpleBinding(int[] map) { this.map = map; }
143 public SimpleBinding(int[] map, Object prepend) { this.map = map; this.prepend = prepend; }
145 public Object invoke(Object[] o) {
146 if (map==null) return impose(o);
148 for(int i=0; i<map.length; i++) max = Math.max(map[i], max);
149 Object[] o2 = new Object[max+1];
150 for(int i=0; i<o.length; i++) o2[map[i]+(prepend==null?0:1)] = o[i];
151 if (prepend != null) o2[0] = prepend;
155 public void toJava(StringBuffer sb) {
156 Bindable.this.toJava(sb);
157 sb.append(".createBinding(");
159 sb.append("new int[] {");
160 for(int i=0; i<map.length; i++) {
162 if (i<map.length-1) sb.append(",");