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Add custom function support to SpEL resolver
Allow adding custom functions to SpEL resolver by name, parameter types, and lambda implementation. Simplifies adding functions without a full interface and implementing class.
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26 changes: 26 additions & 0 deletions
26
engine/src/main/java/pro/verron/officestamper/api/CustomFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| package pro.verron.officestamper.api; | ||
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| import pro.verron.officestamper.utils.TriFunction; | ||
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| import java.util.List; | ||
| import java.util.function.BiFunction; | ||
| import java.util.function.Function; | ||
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| public record CustomFunction( | ||
| String name, | ||
| List<Class<?>> parameterTypes, | ||
| Function<List<Object>, Object> function | ||
| ) { | ||
| public interface NeedsFunctionImpl<T> { | ||
| void withImplementation(Function<T, ?> function); | ||
| } | ||
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| public interface NeedsBiFunctionImpl<T, U> { | ||
| void withImplementation(BiFunction<T, U, ?> object); | ||
| } | ||
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| public interface NeedsTriFunctionImpl<T, U, V> { | ||
| void withImplementation(TriFunction<T, U, V, ?> function); | ||
| } | ||
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| } |
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9 changes: 2 additions & 7 deletions
9
engine/src/main/java/pro/verron/officestamper/core/Invokers.java
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33 changes: 33 additions & 0 deletions
33
engine/src/main/java/pro/verron/officestamper/core/functions/BiFunctionBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package pro.verron.officestamper.core.functions; | ||
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| import pro.verron.officestamper.api.CustomFunction; | ||
| import pro.verron.officestamper.core.DocxStamperConfiguration; | ||
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| import java.util.List; | ||
| import java.util.function.BiFunction; | ||
| import java.util.function.Function; | ||
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| public class BiFunctionBuilder<T, U> | ||
| implements CustomFunction.NeedsBiFunctionImpl<T, U> { | ||
| private final DocxStamperConfiguration source; | ||
| private final String name; | ||
| private final Class<T> class0; | ||
| private final Class<U> class1; | ||
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| public BiFunctionBuilder(DocxStamperConfiguration source, String name, Class<T> class0, Class<U> class1) { | ||
| this.source = source; | ||
| this.name = name; | ||
| this.class0 = class0; | ||
| this.class1 = class1; | ||
| } | ||
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| @Override public void withImplementation(BiFunction<T, U, ?> implementation) { | ||
| Function<List<Object>, Object> function = args -> { | ||
| var arg0 = class0.cast(args.getFirst()); | ||
| var arg1 = class1.cast(args.get(1)); | ||
| return implementation.apply(arg0, arg1); | ||
| }; | ||
| var customFunction = new CustomFunction(name, List.of(class0, class1), function); | ||
| source.addCustomFunction(customFunction); | ||
| } | ||
| } |
30 changes: 30 additions & 0 deletions
30
engine/src/main/java/pro/verron/officestamper/core/functions/FunctionBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package pro.verron.officestamper.core.functions; | ||
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| import pro.verron.officestamper.api.CustomFunction; | ||
| import pro.verron.officestamper.core.DocxStamperConfiguration; | ||
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| import java.util.List; | ||
| import java.util.function.Function; | ||
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| public class FunctionBuilder<T> | ||
| implements CustomFunction.NeedsFunctionImpl<T> { | ||
| private final DocxStamperConfiguration source; | ||
| private final String name; | ||
| private final Class<T> class0; | ||
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| public FunctionBuilder(DocxStamperConfiguration source, String name, Class<T> class0) { | ||
| this.source = source; | ||
| this.name = name; | ||
| this.class0 = class0; | ||
| } | ||
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| @Override public void withImplementation(Function<T, ?> implementation) { | ||
| Function<List<Object>, Object> objectFunction = args -> { | ||
| var arg0 = class0.cast(args.getFirst()); | ||
| return implementation.apply(arg0); | ||
| }; | ||
| var customFunction = new CustomFunction(name, List.of(class0), objectFunction); | ||
| source.addCustomFunction(customFunction); | ||
| } | ||
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| } |
38 changes: 38 additions & 0 deletions
38
engine/src/main/java/pro/verron/officestamper/core/functions/TriFunctionBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| package pro.verron.officestamper.core.functions; | ||
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| import pro.verron.officestamper.api.CustomFunction; | ||
| import pro.verron.officestamper.core.DocxStamperConfiguration; | ||
| import pro.verron.officestamper.utils.TriFunction; | ||
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| import java.util.List; | ||
| import java.util.function.Function; | ||
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| public class TriFunctionBuilder<T, U, V> | ||
| implements CustomFunction.NeedsTriFunctionImpl<T, U, V> { | ||
| private final DocxStamperConfiguration source; | ||
| private final String name; | ||
| private final Class<T> class0; | ||
| private final Class<U> class1; | ||
| private final Class<V> class2; | ||
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| public TriFunctionBuilder( | ||
| DocxStamperConfiguration source, String name, Class<T> class0, Class<U> class1, Class<V> class2 | ||
| ) { | ||
| this.source = source; | ||
| this.name = name; | ||
| this.class0 = class0; | ||
| this.class1 = class1; | ||
| this.class2 = class2; | ||
| } | ||
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| @Override public void withImplementation(TriFunction<T, U, V, ?> implementation) { | ||
| Function<List<Object>, Object> function = args -> { | ||
| var arg0 = class0.cast(args.getFirst()); | ||
| var arg1 = class1.cast(args.get(1)); | ||
| var arg2 = class2.cast(args.get(2)); | ||
| return implementation.apply(arg0, arg1, arg2); | ||
| }; | ||
| var customFunction = new CustomFunction(name, List.of(class0, class1, class2), function); | ||
| source.addCustomFunction(customFunction); | ||
| } | ||
| } |
47 changes: 0 additions & 47 deletions
47
engine/src/main/java/pro/verron/officestamper/preset/IStamperDateFormatter.java
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