Add built-in function library for script

Author: zhossain-info

src/main/java/com/relogiclabs/jschema/internal/library/NFunction.java

@@ -0,0 +1,46 @@
+package com.relogiclabs.jschema.internal.library;
+
+import com.relogiclabs.jschema.internal.engine.ScopeContext;
+import com.relogiclabs.jschema.internal.script.GParameter;
+import com.relogiclabs.jschema.internal.script.RFunction;
+import com.relogiclabs.jschema.type.EValue;
+import lombok.Getter;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static com.relogiclabs.jschema.internal.engine.ScriptTreeHelper.areCompatible;
+import static com.relogiclabs.jschema.internal.util.CollectionHelper.getLast;
+import static com.relogiclabs.jschema.message.ErrorCode.FUNS06;
+
+@Getter
+public class NFunction implements RFunction {
+    private final NHandler handler;
+    private final GParameter[] parameters;
+
+    public NFunction(NHandler handler, String... parameters) {
+        this.handler = handler;
+        this.parameters = toParameters(parameters);
+    }
+
+    private static GParameter[] toParameters(String... names) {
+        return Arrays.stream(names).map(GParameter::new).toArray(GParameter[]::new);
+    }
+
+    @Override
+    public EValue invoke(ScopeContext functionScope, List<EValue> arguments) {
+        return handler.invoke(functionScope, arguments);
+    }
+
+    @Override
+    public ScopeContext bind(ScopeContext parentScope, List<EValue> arguments) {
+        areCompatible(parameters, arguments, FUNS06);
+        return parentScope;
+    }
+
+    @Override
+    public boolean isVariadic() {
+        if(parameters.length == 0) return false;
+        return getLast(parameters).isVariadic();
+    }
+}

src/main/java/com/relogiclabs/jschema/internal/library/NHandler.java

@@ -0,0 +1,11 @@
+package com.relogiclabs.jschema.internal.library;
+
+import com.relogiclabs.jschema.internal.engine.ScopeContext;
+import com.relogiclabs.jschema.type.EValue;
+
+import java.util.List;
+
+@FunctionalInterface
+public interface NHandler {
+    EValue invoke(ScopeContext scope, List<EValue> arguments);
+}

src/main/java/com/relogiclabs/jschema/internal/library/ScriptConstant.java

@@ -0,0 +1,43 @@
+package com.relogiclabs.jschema.internal.library;
+
+public interface ScriptConstant {
+    String CALLER_HVAR = "+caller";
+    String TARGET_HVAR = "+target";
+
+    String ACTUAL_FN1 = "actual#1";
+    String ACTUAL_FN2 = "actual#2";
+    String CEIL_FN1 = "ceil#1";
+    String COPY_FN1 = "copy#1";
+    String EXPECTED_FN1 = "expected#1";
+    String EXPECTED_FN2 = "expected#2";
+    String FAIL_FN1 = "fail#1";
+    String FAIL_FN2 = "fail#2";
+    String FAIL_FN4 = "fail#4";
+    String FILL_FN2 = "fill#2";
+    String FIND_FN2 = "find#2";
+    String FIND_FN3 = "find#3";
+    String FLOOR_FN1 = "floor#1";
+    String LOG_FN1 = "log#1";
+    String MOD_FN2 = "mod#2";
+    String POW_FN2 = "pow#2";
+    String PRINT_FNV = "print#...";
+    String REGULAR_FN1 = "regular#1";
+    String SIZE_FN1 = "size#1";
+    String STRINGIFY_FN1 = "stringify#1";
+    String TICKS_FN0 = "ticks#0";
+    String TYPE_FN1 = "type#1";
+
+    String ACTUAL_ID = "actual";
+    String ARGS_IDV = "args...";
+    String CODE_ID = "code";
+    String EXPECTED_ID = "expected";
+    String FROM_ID = "from";
+    String GROUP_ID = "group";
+    String ITEM_ID = "item";
+    String MESSAGE_ID = "message";
+    String NODE_ID = "node";
+    String SIZE_ID = "size";
+    String VALUE1_ID = "value1";
+    String VALUE2_ID = "value2";
+    String VALUE_ID = "value";
+}