| /* |
| * 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.vxquery.runtime.functions.json; |
| |
| import java.io.BufferedReader; |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory; |
| import org.apache.hyracks.api.context.IHyracksTaskContext; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.primitive.BooleanPointable; |
| import org.apache.hyracks.data.std.primitive.UTF8StringPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| import org.apache.hyracks.dataflow.common.comm.util.ByteBufferInputStream; |
| import org.apache.vxquery.datamodel.accessors.TaggedValuePointable; |
| import org.apache.vxquery.datamodel.accessors.jsonitem.ObjectPointable; |
| import org.apache.vxquery.datamodel.values.ValueTag; |
| import org.apache.vxquery.exceptions.ErrorCode; |
| import org.apache.vxquery.exceptions.SystemException; |
| import org.apache.vxquery.jsonparser.JSONParser; |
| import org.apache.vxquery.runtime.functions.base.AbstractTaggedValueArgumentScalarEvaluator; |
| import org.apache.vxquery.runtime.functions.base.AbstractTaggedValueArgumentScalarEvaluatorFactory; |
| import org.apache.vxquery.runtime.functions.util.FunctionHelper; |
| import org.apache.vxquery.xmlparser.IParser; |
| |
| public class JnParseJsonScalarEvaluatorFactory extends AbstractTaggedValueArgumentScalarEvaluatorFactory { |
| |
| private static final long serialVersionUID = 1L; |
| |
| public JnParseJsonScalarEvaluatorFactory(IScalarEvaluatorFactory[] args) { |
| super(args); |
| } |
| |
| @Override |
| protected IScalarEvaluator createEvaluator(IHyracksTaskContext ctx, IScalarEvaluator[] args) |
| throws AlgebricksException { |
| final UTF8StringPointable stringp = (UTF8StringPointable) UTF8StringPointable.FACTORY.createPointable(); |
| final UTF8StringPointable stringp2 = (UTF8StringPointable) UTF8StringPointable.FACTORY.createPointable(); |
| final ObjectPointable op = (ObjectPointable) ObjectPointable.FACTORY.createPointable(); |
| final BooleanPointable bp = (BooleanPointable) BooleanPointable.FACTORY.createPointable(); |
| final ByteBufferInputStream bbis = new ByteBufferInputStream(); |
| final DataInputStream di = new DataInputStream(bbis); |
| final ArrayBackedValueStorage abvs = new ArrayBackedValueStorage(); |
| |
| return new AbstractTaggedValueArgumentScalarEvaluator(args) { |
| |
| @Override |
| protected void evaluate(TaggedValuePointable[] args, IPointable result) throws SystemException { |
| TaggedValuePointable tvp = args[0]; |
| if (tvp.getTag() != ValueTag.XS_STRING_TAG) { |
| throw new SystemException(ErrorCode.FORG0006); |
| } |
| tvp.getValue(stringp); |
| if (args.length == 1) { |
| callParser(); |
| result.set(abvs); |
| } |
| if (args.length > 1) { |
| TaggedValuePointable tvp1 = args[1]; |
| if (tvp1.getTag() != ValueTag.OBJECT_TAG) { |
| throw new SystemException(ErrorCode.FORG0006); |
| } |
| tvp1.getValue(op); |
| TaggedValuePointable tempTvp = ppool.takeOne(TaggedValuePointable.class); |
| try { |
| op.getKeys(tvp1); |
| tvp1.getValue(stringp2); |
| op.getValue(stringp2, tempTvp); |
| } catch (IOException e1) { |
| throw new SystemException(ErrorCode.SYSE0001, e1); |
| } |
| if (tempTvp.getTag() != ValueTag.XS_BOOLEAN_TAG) { |
| throw new SystemException(ErrorCode.JNTY0020); |
| } |
| tempTvp.getValue(bp); |
| if (bp.getBoolean() == true) { |
| callParser(); |
| result.set(abvs); |
| } else { |
| int items = callParser(); |
| if (items > 1) { |
| throw new SystemException(ErrorCode.JNDY0021); |
| } else { |
| result.set(abvs); |
| } |
| } |
| ppool.giveBack(tempTvp); |
| } |
| } |
| |
| public int callParser() throws SystemException { |
| int items = 0; |
| try { |
| IParser parser = new JSONParser(); |
| String input = FunctionHelper.getStringFromPointable(stringp, bbis, di); |
| InputStreamReader isr = new InputStreamReader(IOUtils.toInputStream(input)); |
| items = parser.parse(new BufferedReader(isr), abvs); |
| } catch (IOException e) { |
| throw new SystemException(ErrorCode.FODC0002, e); |
| } |
| return items; |
| } |
| |
| }; |
| } |
| |
| } |