| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.tajo.catalog; |
| |
| import com.google.common.base.Objects; |
| import com.google.gson.annotations.Expose; |
| import org.apache.tajo.annotation.NotNull; |
| import org.apache.tajo.catalog.json.CatalogGsonHelper; |
| import org.apache.tajo.catalog.proto.CatalogProtos.FunctionDescProto; |
| import org.apache.tajo.catalog.proto.CatalogProtos.FunctionType; |
| import org.apache.tajo.common.ProtoObject; |
| import org.apache.tajo.common.TajoDataTypes.DataType; |
| import org.apache.tajo.exception.TajoInternalError; |
| import org.apache.tajo.function.*; |
| import org.apache.tajo.json.GsonObject; |
| |
| import java.lang.reflect.Constructor; |
| |
| /** |
| * FunctionDesc specifies the description of a function used in Tajo. It consists of three parts: |
| * function definition, invocation description (how to invoke this function), and supplement. |
| * |
| */ |
| public class FunctionDesc implements ProtoObject<FunctionDescProto>, Cloneable, GsonObject, Comparable<FunctionDesc> { |
| |
| @Expose private FunctionSignature signature; |
| @Expose private FunctionInvocation invocation; |
| @Expose private FunctionSupplement supplement; |
| |
| public FunctionDesc() { |
| } |
| |
| public FunctionDesc(String funcName, Class<? extends Function> clazz, |
| FunctionType funcType, DataType retType, @NotNull DataType [] params) { |
| this.signature = new FunctionSignature(funcType, funcName.toLowerCase(), retType, params); |
| this.invocation = new FunctionInvocation(); |
| this.invocation.setLegacy(new ClassBaseInvocationDesc<>(clazz)); |
| this.supplement = new FunctionSupplement(); |
| } |
| |
| public FunctionDesc(FunctionDescProto proto) throws ClassNotFoundException { |
| this.signature = new FunctionSignature(proto.getSignature()); |
| this.invocation = new FunctionInvocation(proto.getInvocation()); |
| this.supplement = new FunctionSupplement(proto.getSupplement()); |
| } |
| |
| public FunctionDesc(String signature, String className, FunctionType type, |
| DataType retType, |
| @NotNull DataType... argTypes) throws ClassNotFoundException { |
| this(signature, (Class<? extends Function>) Class.forName(className), type, retType, argTypes); |
| } |
| |
| public FunctionDesc(FunctionSignature signature, FunctionInvocation invocation, FunctionSupplement supplement) { |
| this.signature = signature; |
| this.invocation = invocation; |
| this.supplement = supplement; |
| } |
| |
| public FunctionSignature getSignature() { |
| return signature; |
| } |
| |
| public FunctionInvocation getInvocation() { |
| return invocation; |
| } |
| |
| public FunctionSupplement getSupplement() { |
| return supplement; |
| } |
| |
| /** |
| * @return Function Instance |
| */ |
| public Function newInstance() { |
| try { |
| Constructor<? extends Function> cons = getLegacyFuncClass().getConstructor(); |
| return cons.newInstance(); |
| } catch (Exception ioe) { |
| throw new TajoInternalError("Cannot initiate function " + signature); |
| } |
| } |
| |
| //////////////////////////////////////// |
| // Function Signature |
| //////////////////////////////////////// |
| |
| public FunctionType getFuncType() { |
| return signature.getFunctionType(); |
| } |
| |
| public String getFunctionName() { |
| return signature.getName(); |
| } |
| |
| public DataType [] getParamTypes() { |
| return signature.getParamTypes(); |
| } |
| |
| public DataType getReturnType() { |
| return signature.getReturnType(); |
| } |
| |
| public boolean isDeterministic() { |
| return signature.isDeterministic(); |
| } |
| |
| //////////////////////////////////////// |
| // Invocation |
| //////////////////////////////////////// |
| |
| @SuppressWarnings("unchecked") |
| public Class<? extends Function> getLegacyFuncClass() { |
| return invocation.getLegacy().getFunctionClass(); |
| } |
| |
| //////////////////////////////////////// |
| // Supplement |
| //////////////////////////////////////// |
| |
| public String getDescription() { |
| return supplement.getShortDescription(); |
| } |
| |
| public String getDetail() { |
| return supplement.getDetail(); |
| } |
| |
| public String getExample() { |
| return supplement.getExample(); |
| } |
| |
| public void setDescription(String description) { |
| supplement.setShortDescription(description); |
| } |
| |
| public void setDetail(String detail) { |
| supplement.setDetail(detail); |
| } |
| |
| public void setExample(String example) { |
| supplement.setExample(example); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(signature); |
| } |
| |
| public int hashCodeWithoutType() { |
| return signature.hashCodeWithoutType(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj instanceof FunctionDesc) { |
| FunctionDesc other = (FunctionDesc) obj; |
| if(this.getProto().equals(other.getProto())) |
| return true; |
| } |
| return false; |
| } |
| |
| public boolean equalsSignature(Object obj) { |
| if (obj instanceof FunctionDesc) { |
| FunctionSignature targetSig = ((FunctionDesc)obj).getSignature(); |
| return this.getSignature().equalsWithoutType(targetSig); |
| } |
| return false; |
| } |
| |
| @Override |
| public Object clone() throws CloneNotSupportedException{ |
| FunctionDesc desc = (FunctionDesc)super.clone(); |
| |
| desc.signature = signature.clone(); |
| desc.supplement = supplement.clone(); |
| desc.invocation = this.invocation; |
| |
| return desc; |
| } |
| |
| @Override |
| public FunctionDescProto getProto() { |
| FunctionDescProto.Builder builder = FunctionDescProto.newBuilder(); |
| builder.setSignature(signature.getProto()); |
| builder.setSupplement(supplement.getProto()); |
| builder.setInvocation(invocation.getProto()); |
| return builder.build(); |
| } |
| |
| @Override |
| public String toString() { |
| return getHelpSignature(); |
| } |
| |
| public String toJson() { |
| return CatalogGsonHelper.toJson(this, FunctionDesc.class); |
| } |
| |
| public String getHelpSignature() { |
| return signature.toString(); |
| } |
| |
| @Override |
| public int compareTo(FunctionDesc o) { |
| return signature.compareTo(o.getSignature()); |
| } |
| } |