1 | (in-package :jss) |
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2 | |
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3 | (defun set-to-list (set) |
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4 | "Convert the java.util.Set named in SET to a Lisp list." |
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5 | (declare (optimize (speed 3) (safety 0))) |
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6 | (with-constant-signature ((iterator "iterator" t) (hasnext "hasNext") (next "next")) |
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7 | (loop with iterator = (iterator set) |
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8 | while (hasNext iterator) |
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9 | for item = (next iterator) |
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10 | collect item))) |
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11 | |
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12 | (defun jlist-to-list (list) |
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13 | "Convert a LIST implementing java.util.List to a Lisp list." |
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14 | (declare (optimize (speed 3) (safety 0))) |
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15 | (loop :for i :from 0 :below (jcall "size" list) |
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16 | :collecting (jcall "get" list i))) |
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17 | |
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18 | (defun jarray-to-list (jarray) |
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19 | "Convert the Java array named by JARRARY into a Lisp list." |
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20 | (declare (optimize (speed 3) (safety 0))) |
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21 | (loop :for i :from 0 :below (jarray-length jarray) |
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22 | :collecting (jarray-ref jarray i))) |
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23 | |
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24 | ;;; Deprecated |
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25 | ;;; |
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26 | ;;; XXX unclear what sort of list this would actually work on, as it |
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27 | ;;; certainly doesn't seem to be any of the Java collection types |
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28 | ;;; (what implements getNext())? |
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29 | (defun list-to-list (list) |
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30 | (declare (optimize (speed 3) (safety 0))) |
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31 | (with-constant-signature ((isEmpty "isEmpty") (getfirst "getFirst") |
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32 | (getNext "getNext")) |
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33 | (loop until (isEmpty list) |
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34 | collect (getFirst list) |
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35 | do (setq list (getNext list))))) |
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36 | |
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37 | ;; Contribution of Luke Hope. (Thanks!) |
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38 | |
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39 | (defun iterable-to-list (iterable) |
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40 | "Return the items contained the java.lang.Iterable ITERABLE as a list." |
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41 | (declare (optimize (speed 3) (safety 0))) |
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42 | (let ((it (#"iterator" iterable))) |
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43 | (with-constant-signature ((has-next "hasNext") |
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44 | (next "next")) |
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45 | (loop :while (has-next it) |
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46 | :collect (next it))))) |
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47 | |
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48 | (defun vector-to-list (vector) |
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49 | "Return the elements of java.lang.Vector VECTOR as a list." |
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50 | (declare (optimize (speed 3) (safety 0))) |
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51 | (with-constant-signature ((has-more "hasMoreElements") |
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52 | (next "nextElement")) |
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53 | (let ((elements (#"elements" vector))) |
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54 | (loop :while (has-more elements) |
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55 | :collect (next elements))))) |
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56 | |
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57 | (defun hashmap-to-hashtable (hashmap &rest rest &key (keyfun #'identity) (valfun #'identity) (invert? nil) |
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58 | table |
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59 | &allow-other-keys ) |
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60 | "Converts the a HASHMAP reference to a java.util.HashMap object to a Lisp hashtable. |
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61 | |
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62 | The REST paramter specifies arguments to the underlying MAKE-HASH-TABLE call. |
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63 | |
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64 | KEYFUN and VALFUN specifies functions to be run on the keys and values |
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65 | of the HASHMAP right before they are placed in the hashtable. |
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66 | |
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67 | If INVERT? is non-nil than reverse the keys and values in the resulting hashtable." |
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68 | (let ((keyset (#"keySet" hashmap)) |
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69 | (table (or table (apply 'make-hash-table |
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70 | (loop for (key value) on rest by #'cddr |
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71 | unless (member key '(:invert? :valfun :keyfun :table)) |
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72 | collect key and collect value))))) |
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73 | (with-constant-signature ((iterator "iterator" t) (hasnext "hasNext") (next "next")) |
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74 | (loop with iterator = (iterator keyset) |
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75 | while (hasNext iterator) |
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76 | for item = (next iterator) |
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77 | do (if invert? |
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78 | (setf (gethash (funcall valfun (#"get" hashmap item)) table) (funcall keyfun item)) |
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79 | (setf (gethash (funcall keyfun item) table) (funcall valfun (#"get" hashmap item))))) |
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80 | table))) |
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81 | |
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82 | ;; **************************************************************** |
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83 | ;; But needing to remember is annoying |
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84 | |
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85 | ;; Here's a summary I gleaned: |
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86 | |
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87 | ;; java.util.Dictionary -> #"elements" yields java.util.Collections$3 |
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88 | ;; java.util.AbstractCollection -> #"iterator" yields java.util.Iterator? |
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89 | ;; org.apache.felix.framework.util.CompoundEnumeration -> implements java.util.Enumeration |
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90 | ;; java.util.Collections -> doc says #"iterator" yields java.util.Iterator |
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91 | ;; java.util.Collections$1) -> implements java.util.Iterator |
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92 | ;; java.util.Collections$2) -> implements java.util.Spliterator (#"iterator" (#"stream" 'StreamSupport <a spliterator>)) -> java.util.Iterator |
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93 | ;; java.util.Collections$3) -> implements java.util.Enumeration |
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94 | ;; java.util.Iterator |
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95 | ;; ("next" "hasNext") |
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96 | ;; java.util.Enumeration) |
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97 | ;; ("nextElement" "hasMoreElements") |
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98 | |
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99 | ;; TODO: maybe do it even more MAPC-style and accept multiple sequences too? |
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100 | (defun jmap (function thing) |
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101 | "Call FUNCTION for every element in the THING. Returns NIL. |
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102 | |
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103 | THING may be a wide range of Java collection types, their common iterators or |
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104 | a Java array. |
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105 | |
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106 | In case the THING is a map-like object, FUNCTION will be called with two |
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107 | arguments, key and value." |
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108 | (flet ((iterator-run (iterator) |
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109 | (with-constant-signature ((has-next "hasNext") |
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110 | (next "next")) |
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111 | (loop :while (has-next iterator) |
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112 | :do (funcall function (next iterator))))) |
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113 | (enumeration-run (enumeration) |
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114 | (with-constant-signature ((has-next "hasMoreElements") |
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115 | (next "nextElement")) |
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116 | (loop :while (has-next enumeration) |
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117 | :do (funcall function (next enumeration))))) |
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118 | (map-run (map) |
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119 | (with-constant-signature ((has-next "hasMoreElements") |
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120 | (next "nextElement")) |
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121 | (let ((keyiterator (#"iterator" (#"keyset" map)))) |
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122 | (loop :while (has-next keyiterator) |
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123 | :for key = (next keyiterator) |
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124 | :do (funcall function key (#"get" map key))))))) |
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125 | (let ((isinstance |
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126 | (load-time-value (jmethod "java.lang.Class" "isInstance" "java.lang.Object")))) |
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127 | (cond |
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128 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.AbstractCollection"))) thing) |
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129 | (iterator-run (#"iterator" thing))) |
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130 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Iterator"))) thing) |
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131 | (iterator-run thing)) |
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132 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.lang.Iterable"))) thing) |
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133 | (iterator-run (#"iterator" thing))) |
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134 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Enumeration"))) thing) |
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135 | (enumeration-run thing)) |
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136 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.AbstractMap"))) thing) |
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137 | (map-run thing)) |
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138 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Collections"))) thing) |
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139 | (iterator-run (#"iterator" thing))) |
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140 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Spliterator"))) thing) |
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141 | (iterator-run (#"iterator" (#"stream" 'StreamSupport thing)))) |
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142 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Dictionary"))) thing) |
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143 | (iterator-run (#"elements" thing))) |
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144 | (t |
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145 | (let ((jarray (ignore-errors |
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146 | (or (and (jclass-array-p (jclass-of thing)) |
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147 | thing) |
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148 | (#"toArray" thing))))) |
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149 | (if jarray |
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150 | (loop :for i :from 0 :below (jarray-length jarray) |
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151 | :do (funcall function (jarray-ref jarray i))) |
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152 | (error "yet another iteration type - fix it: ~a" (jclass-name (jobject-class thing))))))))) |
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153 | NIL) |
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154 | |
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155 | (defun j2list (thing) |
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156 | "Attempt to construct a Lisp list out of a Java THING. |
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157 | |
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158 | THING may be a wide range of Java collection types, their common |
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159 | iterators or a Java array." |
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160 | (declare (optimize (speed 3) (safety 0))) |
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161 | (flet ((iterator-collect (iterator) |
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162 | (with-constant-signature ((has-next "hasNext") |
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163 | (next "next")) |
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164 | (loop :while (has-next iterator) |
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165 | :collect (next iterator)))) |
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166 | (enumeration-collect (enumeration) |
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167 | (with-constant-signature ((has-next "hasMoreElements") |
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168 | (next "nextElement")) |
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169 | (loop :while (has-next enumeration) |
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170 | :collect (next enumeration)))) |
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171 | (map-collect (map) |
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172 | (with-constant-signature ((has-next "hasMoreElements") |
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173 | (next "nextElement")) |
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174 | (let ((keyiterator (#"iterator" (#"keyset" map)))) |
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175 | (loop :while (has-next keyiterator) |
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176 | :for key = (next keyiterator) |
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177 | :collect (cons key (#"get" map key))))))) |
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178 | (let ((isinstance |
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179 | (load-time-value (jmethod "java.lang.Class" "isInstance" "java.lang.Object")))) |
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180 | (cond |
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181 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.AbstractCollection"))) thing) |
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182 | (iterator-collect (#"iterator" thing))) |
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183 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Iterator"))) thing) |
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184 | (iterator-collect thing)) |
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185 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.lang.Iterable"))) thing) |
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186 | (iterator-collect (#"iterator" thing))) |
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187 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Enumeration"))) thing) |
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188 | (enumeration-collect thing)) |
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189 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.AbstractMap"))) thing) |
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190 | (map-collect thing)) |
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191 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Collections"))) thing) |
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192 | (iterator-collect (#"iterator" thing))) |
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193 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Spliterator"))) thing) |
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194 | (iterator-collect (#"iterator" (#"stream" 'StreamSupport thing)))) |
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195 | ((jcall isinstance (load-time-value (ignore-errors (jclass "java.util.Dictionary"))) thing) |
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196 | (iterator-collect (#"elements" thing))) |
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197 | (t |
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198 | (let ((jarray (ignore-errors |
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199 | (or (and (jclass-array-p (jclass-of thing)) |
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200 | thing) |
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201 | (#"toArray" thing))))) |
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202 | (if jarray |
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203 | (loop :for i :from 0 :below (jarray-length jarray) |
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204 | :collect (jarray-ref jarray i)) |
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205 | (error "yet another iteration type - fix it: ~a" (jclass-name (jobject-class thing)))))))))) |
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206 | |
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207 | (defun to-hashset (list) |
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208 | "Convert LIST to the java.util.HashSet contract" |
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209 | (let ((set (new 'java.util.hashset))) |
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210 | (loop for l in list do (#"add" set l)) |
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211 | set)) |
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