8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nashorn.tools.jjs;
27
28 import java.io.IOException;
29 import java.util.Collections;
30 import java.util.HashSet;
31 import java.util.Set;
32 import java.util.function.Function;
33 import java.util.function.Supplier;
34 import jdk.internal.jline.console.history.FileHistory;
35 import jdk.internal.jline.console.history.History;
36 import jdk.nashorn.api.scripting.AbstractJSObject;
37 import jdk.nashorn.api.scripting.JSObject;
38 import jdk.nashorn.internal.runtime.JSType;
39 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
40
41 /*
42 * A script friendly object that exposes history of commands to scripts.
43 */
44 final class HistoryObject extends AbstractJSObject {
45 private static final Set<String> props;
46 static {
47 final HashSet<String> s = new HashSet<>();
48 s.add("clear");
49 s.add("forEach");
50 s.add("print");
51 s.add("size");
52 s.add("toString");
53 props = Collections.unmodifiableSet(s);
54 }
55
56 private final FileHistory hist;
57
58 HistoryObject(final FileHistory hist) {
59 this.hist = hist;
60 }
61
62 @Override
63 public Object getMember(final String name) {
64 switch (name) {
65 case "clear":
66 return (Runnable)hist::clear;
67 case "forEach":
68 return (Function<JSObject, Object>)this::iterate;
69 case "print":
70 return (Runnable)this::print;
71 case "size":
72 return hist.size();
73 case "toString":
74 return (Supplier<String>)this::toString;
75 }
76 return UNDEFINED;
77 }
78
79 @Override
80 public Object getDefaultValue(final Class<?> hint) {
81 if (hint == String.class) {
82 return toString();
83 }
84 return UNDEFINED;
85 }
86
87 @Override
88 public String toString() {
89 final StringBuilder buf = new StringBuilder();
90 for (History.Entry e : hist) {
91 buf.append(e.value()).append('\n');
92 }
93 return buf.toString();
94 }
95
96 @Override
97 public Set<String> keySet() {
98 return props;
99 }
100
101 private void print() {
102 for (History.Entry e : hist) {
103 System.out.println(e.value());
104 }
105 }
106
107 private Object iterate(final JSObject func) {
108 for (History.Entry e : hist) {
109 if (JSType.toBoolean(func.call(this, e.value().toString()))) {
110 break; // return true from callback to skip iteration
111 }
112 }
113 return UNDEFINED;
114 }
115 }
|
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nashorn.tools.jjs;
27
28 import java.io.BufferedReader;
29 import java.io.File;
30 import java.io.FileReader;
31 import java.io.IOException;
32 import java.io.PrintWriter;
33 import java.util.Collections;
34 import java.util.HashSet;
35 import java.util.Set;
36 import java.util.function.Consumer;
37 import java.util.function.Function;
38 import java.util.function.Supplier;
39 import jdk.internal.jline.console.history.FileHistory;
40 import jdk.internal.jline.console.history.History;
41 import jdk.nashorn.api.scripting.AbstractJSObject;
42 import jdk.nashorn.api.scripting.JSObject;
43 import jdk.nashorn.internal.runtime.JSType;
44 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
45 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
46
47 /*
48 * A script friendly object that exposes history of commands to scripts.
49 */
50 final class HistoryObject extends AbstractJSObject {
51 private static final Set<String> props;
52 static {
53 final HashSet<String> s = new HashSet<>();
54 s.add("clear");
55 s.add("forEach");
56 s.add("load");
57 s.add("print");
58 s.add("save");
59 s.add("size");
60 s.add("toString");
61 props = Collections.unmodifiableSet(s);
62 }
63
64 private final FileHistory hist;
65 private final PrintWriter err;
66 private final Consumer<String> evaluator;
67
68 HistoryObject(final FileHistory hist, final PrintWriter err,
69 final Consumer<String> evaluator) {
70 this.hist = hist;
71 this.err = err;
72 this.evaluator = evaluator;
73 }
74
75 @Override
76 public boolean isFunction() {
77 return true;
78 }
79
80 @Override
81 public Object call(final Object thiz, final Object... args) {
82 if (args.length > 0) {
83 int index = JSType.toInteger(args[0]);
84 if (index < 0) {
85 index += (hist.size() - 1);
86 } else {
87 index--;
88 }
89
90 if (index >= 0 && index < (hist.size() - 1)) {
91 final CharSequence src = hist.get(index);
92 hist.replace(src);
93 err.println(src);
94 evaluator.accept(src.toString());
95 } else {
96 hist.removeLast();
97 err.println("no history entry @ " + (index + 1));
98 }
99 }
100 return UNDEFINED;
101 }
102
103 @Override
104 public Object getMember(final String name) {
105 switch (name) {
106 case "clear":
107 return (Runnable)hist::clear;
108 case "forEach":
109 return (Function<JSObject, Object>)this::iterate;
110 case "load":
111 return (Consumer<Object>)this::load;
112 case "print":
113 return (Runnable)this::print;
114 case "save":
115 return (Consumer<Object>)this::save;
116 case "size":
117 return hist.size();
118 case "toString":
119 return (Supplier<String>)this::toString;
120 }
121 return UNDEFINED;
122 }
123
124 @Override
125 public Object getDefaultValue(final Class<?> hint) {
126 if (hint == String.class) {
127 return toString();
128 }
129 return UNDEFINED;
130 }
131
132 @Override
133 public String toString() {
134 final StringBuilder buf = new StringBuilder();
135 for (History.Entry e : hist) {
136 buf.append(e.value()).append('\n');
137 }
138 return buf.toString();
139 }
140
141 @Override
142 public Set<String> keySet() {
143 return props;
144 }
145
146 private void save(final Object obj) {
147 final File file = getFile(obj);
148 try (final PrintWriter pw = new PrintWriter(file)) {
149 for (History.Entry e : hist) {
150 pw.println(e.value());
151 }
152 } catch (final IOException exp) {
153 throw new RuntimeException(exp);
154 }
155 }
156
157 private void load(final Object obj) {
158 final File file = getFile(obj);
159 String item = null;
160 try (final BufferedReader r = new BufferedReader(new FileReader(file))) {
161 while ((item = r.readLine()) != null) {
162 hist.add(item);
163 }
164 } catch (final IOException exp) {
165 throw new RuntimeException(exp);
166 }
167 }
168
169 private void print() {
170 for (History.Entry e : hist) {
171 System.out.printf("%3d %s\n", e.index() + 1, e.value());
172 }
173 }
174
175 private Object iterate(final JSObject func) {
176 for (History.Entry e : hist) {
177 if (JSType.toBoolean(func.call(this, e.value().toString()))) {
178 break; // return true from callback to skip iteration
179 }
180 }
181 return UNDEFINED;
182 }
183
184 private static File getFile(final Object obj) {
185 File file = null;
186 if (obj instanceof String) {
187 file = new File((String)obj);
188 } else if (obj instanceof File) {
189 file = (File)obj;
190 } else {
191 throw typeError("not.a.file", JSType.toString(obj));
192 }
193
194 return file;
195 }
196 }
|