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| 1 | +/* |
| 2 | + * #%L |
| 3 | + * ImageJ software for multidimensional image processing and analysis. |
| 4 | + * %% |
| 5 | + * Copyright (C) 2014 - 2018 ImageJ 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 net.imagej.ops.eval; |
| 31 | + |
| 32 | +import java.util.Map; |
| 33 | + |
| 34 | +import org.scijava.ops.OpService; |
| 35 | +import org.scijava.ops.core.Op; |
| 36 | +import org.scijava.ops.core.function.Function3; |
| 37 | +import org.scijava.param.Parameter; |
| 38 | +import org.scijava.plugin.Plugin; |
| 39 | +import org.scijava.struct.ItemIO; |
| 40 | + |
| 41 | +/** |
| 42 | + * Evaluates an expression. |
| 43 | + * <p> |
| 44 | + * The expression is parsed using |
| 45 | + * <a href="https://github.com/scijava/parsington">Parsington</a>, the SciJava |
| 46 | + * expression parsing library, then evaluated by invoking available ops. |
| 47 | + * </p> |
| 48 | + * |
| 49 | + * @author Curtis Rueden |
| 50 | + * @see OpEvaluator |
| 51 | + */ |
| 52 | +@Plugin(type = Op.class, name = "eval") |
| 53 | +@Parameter(key = "input") |
| 54 | +@Parameter(key = "vars") |
| 55 | +@Parameter(key = "opService") |
| 56 | +@Parameter(key = "output", type = ItemIO.OUTPUT) |
| 57 | +public class DefaultEval implements Function3<String, Map<String, Object>, OpService, Object> |
| 58 | +{ |
| 59 | + |
| 60 | + @Override |
| 61 | + public Object apply(final String input, final Map<String, Object> vars, final OpService ops) { |
| 62 | + OpEvaluator e = new OpEvaluator(ops); |
| 63 | + if (vars != null) e.setAll(vars); |
| 64 | + return e.evaluate(input); |
| 65 | + } |
| 66 | + |
| 67 | +} |
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