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feat(filter): adds LineFilter to reason about statements in blocks
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src/main/java/spoon/reflect/visitor/filter/LineFilter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /** | ||
| * Copyright (C) 2006-2015 INRIA and contributors | ||
| * Spoon - http://spoon.gforge.inria.fr/ | ||
| * | ||
| * This software is governed by the CeCILL-C License under French law and | ||
| * abiding by the rules of distribution of free software. You can use, modify | ||
| * and/or redistribute the software under the terms of the CeCILL-C license as | ||
| * circulated by CEA, CNRS and INRIA at http://www.cecill.info. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| * FITNESS FOR A PARTICULAR PURPOSE. See the CeCILL-C License for more details. | ||
| * | ||
| * The fact that you are presently reading this means that you have had | ||
| * knowledge of the CeCILL-C license and that you accept its terms. | ||
| */ | ||
| package spoon.reflect.visitor.filter; | ||
|
|
||
| import spoon.reflect.code.CtBlock; | ||
| import spoon.reflect.code.CtIf; | ||
| import spoon.reflect.code.CtLoop; | ||
| import spoon.reflect.code.CtStatement; | ||
| import spoon.reflect.code.CtStatementList; | ||
| import spoon.reflect.declaration.CtElement; | ||
| import spoon.reflect.declaration.ParentNotInitializedException; | ||
|
|
||
| /** | ||
| * This filter matches all elements that can be considered as line of code (e.g. directly contained in a block, or a then statement). This discards CtStatement that are not used as statement (such as a method call used as RHS). | ||
| * <pre> | ||
| * // lines of a method | ||
| * List<CtStatement> lines = method.getElements(new LineFilter()); | ||
| * // find the parent that is used as a statement (in a block or in a branch) | ||
| * CtStatement parentStatement = element.getParent(new LineFilter()); | ||
| * </pre> | ||
| */ | ||
| public class LineFilter extends TypeFilter<CtStatement> { | ||
|
|
||
| /** | ||
| * Creates the filter. | ||
| */ | ||
| public LineFilter() { | ||
| super(CtStatement.class); | ||
| } | ||
|
|
||
| @Override | ||
| public boolean matches(CtStatement element) { | ||
| if (!super.matches(element)) { | ||
| return false; | ||
| } | ||
| if (element instanceof CtBlock) { | ||
| return false; | ||
| } | ||
| CtElement parent; | ||
| try { | ||
| parent = element.getParent(); | ||
| } catch (ParentNotInitializedException e) { | ||
| return false; | ||
| } | ||
| if (parent instanceof CtStatementList) { | ||
| return true; | ||
| } | ||
| if (parent instanceof CtIf) { | ||
| CtIf anIf = (CtIf) parent; | ||
| return element.equals(anIf.getThenStatement()) || element.equals(anIf.getElseStatement()); | ||
| } | ||
| if (parent instanceof CtLoop) { | ||
| CtLoop loop = (CtLoop) parent; | ||
| return loop.getBody().equals(element); | ||
| } | ||
| return false; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| package spoon.test.filters; | ||
|
|
||
| class FooLine { | ||
| void simple() { | ||
| int x = 3; | ||
| int z = 0; | ||
| System.out.println(z); | ||
| } | ||
|
|
||
| void loopBlock() { | ||
| for(int i = 0; i < 10; i++) { | ||
| System.out.println(i); | ||
| } | ||
| } | ||
|
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| void loopNoBlock() { | ||
| for(int i = 0; i < 10; i++) | ||
| System.out.println(i); | ||
| } | ||
|
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| void ifBlock() { | ||
| if (3 < 4) { | ||
| System.out.println("if"); | ||
| } | ||
| } | ||
|
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| void ifNoBlock() { | ||
| if (3 < 4) | ||
| System.out.println("if"); | ||
| } | ||
|
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| void switchBlock() { | ||
| switch ("test") { | ||
| case "test": | ||
| break; | ||
| default: | ||
| System.out.println("switch"); | ||
| } | ||
| } | ||
| } | ||
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