The Strategy pattern (also known as the policy pattern) is a software design pattern that - * enables an algorithm's behavior to be selected at runtime.
- * - *Before Java 8 the Strategies needed to be separate classes forcing the developer - * to write lots of boilerplate code. With modern Java it is easy to pass behavior with method - * references and lambdas making the code shorter and more readable.
+ *The Separated Interface pattern encourages to separate the interface definition and + * implementation in different packages. This allows the client to be completely unaware of the + * implementation.
* + *In this class the {@link InvoiceGenerator} class is injected with different instances of + * {@link com.iluwatar.separatedinterface.invoice.TaxCalculator} implementations located in separate + * packages, to receive different responses for both of the implementations.
*/ public class App { diff --git a/separated-interface/src/main/java/com/iluwatar/separatedinterface/invoice/InvoiceGenerator.java b/separated-interface/src/main/java/com/iluwatar/separatedinterface/invoice/InvoiceGenerator.java index f73ee32d8..c17ed5ac5 100644 --- a/separated-interface/src/main/java/com/iluwatar/separatedinterface/invoice/InvoiceGenerator.java +++ b/separated-interface/src/main/java/com/iluwatar/separatedinterface/invoice/InvoiceGenerator.java @@ -1,8 +1,31 @@ +/* + * The MIT License + * Copyright © 2014-2019 Ilkka Seppälä + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + package com.iluwatar.separatedinterface.invoice; /** * InvoiceGenerator class generates an invoice, accepting the product cost and calculating the total - * price payable inclusive tax (calculated by {@link TaxCalculator}) + * price payable inclusive tax (calculated by {@link TaxCalculator}). */ public class InvoiceGenerator { diff --git a/separated-interface/src/test/java/com/iluwatar/separatedinterface/invoice/InvoiceGeneratorTest.java b/separated-interface/src/test/java/com/iluwatar/separatedinterface/invoice/InvoiceGeneratorTest.java index 669fb1452..ac75d3b70 100644 --- a/separated-interface/src/test/java/com/iluwatar/separatedinterface/invoice/InvoiceGeneratorTest.java +++ b/separated-interface/src/test/java/com/iluwatar/separatedinterface/invoice/InvoiceGeneratorTest.java @@ -1,3 +1,26 @@ +/* + * The MIT License + * Copyright © 2014-2019 Ilkka Seppälä + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + package com.iluwatar.separatedinterface.invoice; import org.junit.jupiter.api.Assertions; diff --git a/separated-interface/src/test/java/com/iluwatar/separatedinterface/taxes/DomesticTaxTest.java b/separated-interface/src/test/java/com/iluwatar/separatedinterface/taxes/DomesticTaxTest.java index e562586c2..d070d8b0a 100644 --- a/separated-interface/src/test/java/com/iluwatar/separatedinterface/taxes/DomesticTaxTest.java +++ b/separated-interface/src/test/java/com/iluwatar/separatedinterface/taxes/DomesticTaxTest.java @@ -1,3 +1,26 @@ +/* + * The MIT License + * Copyright © 2014-2019 Ilkka Seppälä + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + package com.iluwatar.separatedinterface.taxes; import org.junit.jupiter.api.Assertions; diff --git a/separated-interface/src/test/java/com/iluwatar/separatedinterface/taxes/ForeignTaxTest.java b/separated-interface/src/test/java/com/iluwatar/separatedinterface/taxes/ForeignTaxTest.java index 86bf39e80..df184276c 100644 --- a/separated-interface/src/test/java/com/iluwatar/separatedinterface/taxes/ForeignTaxTest.java +++ b/separated-interface/src/test/java/com/iluwatar/separatedinterface/taxes/ForeignTaxTest.java @@ -1,3 +1,26 @@ +/* + * The MIT License + * Copyright © 2014-2019 Ilkka Seppälä + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + package com.iluwatar.separatedinterface.taxes; import org.junit.jupiter.api.Assertions;