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Added support for custom JSR-223 based formatters
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62 changes: 62 additions & 0 deletions
62
lib/src/main/java/com/diffplug/spotless/generic/Jsr223Step.java
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/* | ||
* Copyright 2021 DiffPlug | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
package com.diffplug.spotless.generic; | ||
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import java.io.Serializable; | ||
import java.util.Objects; | ||
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import javax.script.ScriptEngine; | ||
import javax.script.ScriptEngineManager; | ||
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import com.diffplug.spotless.FormatterFunc; | ||
import com.diffplug.spotless.FormatterStep; | ||
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public final class Jsr223Step { | ||
// prevent direct instantiation | ||
private Jsr223Step() {} | ||
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public static FormatterStep create(String name, CharSequence engine, CharSequence script) { | ||
Objects.requireNonNull(name, "name"); | ||
Objects.requireNonNull(engine, "engine"); | ||
Objects.requireNonNull(script, "script"); | ||
return FormatterStep.createLazy(name, | ||
() -> new State(engine, script), | ||
State::toFormatter); | ||
} | ||
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private static final class State implements Serializable { | ||
private static final long serialVersionUID = 1L; | ||
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private final String engine; | ||
private final String script; | ||
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State(CharSequence engine, CharSequence script) { | ||
this.engine = engine.toString(); | ||
this.script = script.toString(); | ||
} | ||
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FormatterFunc toFormatter() { | ||
ScriptEngineManager scriptEngineManager = new ScriptEngineManager(); | ||
ScriptEngine scriptEngine = scriptEngineManager.getEngineByName(engine); | ||
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// evaluate JavaScript code | ||
return raw -> { | ||
scriptEngine.put("source", raw); | ||
return (String) scriptEngine.eval(script); | ||
}; | ||
} | ||
} | ||
} |
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44 changes: 44 additions & 0 deletions
44
plugin-maven/src/main/java/com/diffplug/spotless/maven/generic/Jsr223.java
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/* | ||
* Copyright 2021 DiffPlug | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
package com.diffplug.spotless.maven.generic; | ||
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import org.apache.maven.plugins.annotations.Parameter; | ||
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import com.diffplug.spotless.FormatterStep; | ||
import com.diffplug.spotless.generic.Jsr223Step; | ||
import com.diffplug.spotless.maven.FormatterStepConfig; | ||
import com.diffplug.spotless.maven.FormatterStepFactory; | ||
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public class Jsr223 implements FormatterStepFactory { | ||
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@Parameter | ||
private String name; | ||
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@Parameter | ||
private String engine; | ||
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@Parameter | ||
private String script; | ||
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@Override | ||
public FormatterStep newFormatterStep(FormatterStepConfig config) { | ||
if (name == null || engine == null || script == null) { | ||
throw new IllegalArgumentException("Must specify 'name', 'engine' and 'script'."); | ||
} | ||
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return Jsr223Step.create(name, engine, script); | ||
} | ||
} |
41 changes: 41 additions & 0 deletions
41
plugin-maven/src/test/java/com/diffplug/spotless/maven/generic/Jsr223Test.java
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/* | ||
* Copyright 2021 DiffPlug | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
package com.diffplug.spotless.maven.generic; | ||
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import org.junit.Test; | ||
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import com.diffplug.spotless.maven.MavenIntegrationHarness; | ||
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public class Jsr223Test extends MavenIntegrationHarness { | ||
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@Test | ||
public void fromContent() throws Exception { | ||
writePomWithFormatSteps( | ||
"<jsr223>", | ||
" <name>Greetings to Mars</name>", | ||
" <engine>nashorn</engine>", | ||
" <script>source.replace('World','Mars');</script>", | ||
"</jsr223>"); | ||
runTest("Hello World", "Hello Mars"); | ||
} | ||
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private void runTest(String sourceContent, String targetContent) throws Exception { | ||
String path = "src/main/java/test.java"; | ||
setFile(path).toContent(sourceContent); | ||
mavenRunner().withArguments("spotless:apply").runNoError(); | ||
assertFile(path).hasContent(targetContent); | ||
} | ||
} |