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| 1 | +/* |
| 2 | + * #%L |
| 3 | + * SciJava Operations: a framework for reusable algorithms. |
| 4 | + * %% |
| 5 | + * Copyright (C) 2018 SciJava developers. |
| 6 | + * %% |
| 7 | + * Redistribution and use in source and binary forms, with or without |
| 8 | + * modification, are permitted provided that the following conditions are met: |
| 9 | + * |
| 10 | + * 1. Redistributions of source code must retain the above copyright notice, |
| 11 | + * this list of conditions and the following disclaimer. |
| 12 | + * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 13 | + * this list of conditions and the following disclaimer in the documentation |
| 14 | + * and/or other materials provided with the distribution. |
| 15 | + * |
| 16 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 17 | + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE |
| 20 | + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 23 | + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 24 | + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 25 | + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 | + * POSSIBILITY OF SUCH DAMAGE. |
| 27 | + * #L% |
| 28 | + */ |
| 29 | + |
| 30 | +package org.scijava.ops; |
| 31 | + |
| 32 | +import static org.junit.Assert.assertEquals; |
| 33 | + |
| 34 | +import java.util.function.BiFunction; |
| 35 | +import java.util.function.Function; |
| 36 | + |
| 37 | +import org.junit.Test; |
| 38 | +import org.scijava.ops.core.OpCollection; |
| 39 | +import org.scijava.ops.types.Nil; |
| 40 | +import org.scijava.ops.util.Functions; |
| 41 | +import org.scijava.param.Parameter; |
| 42 | +import org.scijava.plugin.Plugin; |
| 43 | +import org.scijava.struct.ItemIO; |
| 44 | + |
| 45 | +/** |
| 46 | + * @author Marcel Wiedenmann |
| 47 | + */ |
| 48 | +@Plugin(type = OpCollection.class) |
| 49 | +public class OpMethodTest extends AbstractTestEnvironment { |
| 50 | + |
| 51 | + @Test |
| 52 | + public void testParseIntegerOp() { |
| 53 | + // Will match a lambda created and returned by createParseIntegerOp() below. |
| 54 | + final Function<String, Integer> parseIntegerOp = Functions.unary(ops, "test.parseInteger", new Nil<String>() {}, |
| 55 | + new Nil<Integer>() |
| 56 | + {}); |
| 57 | + |
| 58 | + final String numericString = "42"; |
| 59 | + final Integer parsedInteger = parseIntegerOp.apply(numericString); |
| 60 | + assertEquals(Integer.parseInt(numericString), (int) parsedInteger); |
| 61 | + } |
| 62 | + |
| 63 | + @Test |
| 64 | + public void testMultiplyNumericStringsOpMethod() { |
| 65 | + // Will match a lambda created and returned by |
| 66 | + // createMultiplyNumericStringsOp(..), which itself captured a lambda |
| 67 | + // created and returned by createParseIntegerOp(). |
| 68 | + final BiFunction<String, String, Integer> multiplyNumericStringsOp = Functions.binary(ops, |
| 69 | + "test.multiplyNumericStrings", new Nil<String>() |
| 70 | + {}, new Nil<String>() {}, new Nil<Integer>() {}); |
| 71 | + |
| 72 | + final String numericString1 = "3"; |
| 73 | + final String numericString2 = "18"; |
| 74 | + final Integer multipliedNumericStrings = multiplyNumericStringsOp.apply(numericString1, numericString2); |
| 75 | + assertEquals(Integer.parseInt(numericString1) * Integer.parseInt(numericString2), (int) multipliedNumericStrings); |
| 76 | + } |
| 77 | + |
| 78 | + @OpMethod(names = "test.parseInteger") |
| 79 | + // Refers to the input parameter of the function that's returned by this |
| 80 | + // factory method. |
| 81 | + @Parameter(key = "numericString") |
| 82 | + // Refers to the output parameter of the function. |
| 83 | + @Parameter(key = "parsedInteger", itemIO = ItemIO.OUTPUT) |
| 84 | + public Function<String, Integer> createParseIntegerOp() { |
| 85 | + return Integer::parseInt; |
| 86 | + } |
| 87 | + |
| 88 | + @OpMethod(names = "test.multiplyNumericStrings") |
| 89 | + @Parameter(key = "numericString1") |
| 90 | + @Parameter(key = "numericString2") |
| 91 | + @Parameter(key = "multipliedNumericStrings", itemIO = ItemIO.OUTPUT) |
| 92 | + // Refers to the first parameter of this factory method ("parseIntegerOp"). |
| 93 | + // Will be automatically provided by the matching system. Can be used by the |
| 94 | + // returned lambda/Op as if it was an @OpDependency-annotated field in a |
| 95 | + // regular Op class. |
| 96 | + @OpDependency(name = "test.parseInteger") |
| 97 | + public BiFunction<String, String, Integer> createMultiplyNumericStringsOp( |
| 98 | + final Function<String, Integer> parseIntegerOp) |
| 99 | + { |
| 100 | + return (i1, i2) -> parseIntegerOp.apply(i1) * parseIntegerOp.apply(i2); |
| 101 | + } |
| 102 | +} |
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