| /* |
| * 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 org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import org.apache.hyracks.api.context.IHyracksTaskContext; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.primitive.UTF8StringPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| import org.apache.vxquery.datamodel.accessors.SequencePointable; |
| import org.apache.vxquery.datamodel.accessors.TaggedValuePointable; |
| import org.apache.vxquery.datamodel.accessors.jsonitem.ObjectPointable; |
| import org.apache.vxquery.datamodel.builders.jsonitem.ObjectBuilder; |
| import org.apache.vxquery.datamodel.builders.sequence.SequenceBuilder; |
| import org.apache.vxquery.datamodel.values.ValueTag; |
| import org.apache.vxquery.exceptions.ErrorCode; |
| import org.apache.vxquery.exceptions.SystemException; |
| import org.apache.vxquery.runtime.functions.base.AbstractTaggedValueArgumentScalarEvaluator; |
| import org.apache.vxquery.runtime.functions.util.FunctionHelper; |
| |
| import java.io.IOException; |
| |
| public abstract class AbstractLibjnProjectScalarEvaluator extends AbstractTaggedValueArgumentScalarEvaluator { |
| protected final IHyracksTaskContext ctx; |
| protected final ObjectPointable op; |
| protected final UTF8StringPointable stringKey; |
| protected final ObjectBuilder ob; |
| protected final SequenceBuilder sb; |
| protected final SequencePointable sp1; |
| protected final TaggedValuePointable tvp1; |
| |
| public AbstractLibjnProjectScalarEvaluator(IHyracksTaskContext ctx, IScalarEvaluator[] args) { |
| super(args); |
| this.ctx = ctx; |
| stringKey = (UTF8StringPointable) UTF8StringPointable.FACTORY.createPointable(); |
| ob = new ObjectBuilder(); |
| sb = new SequenceBuilder(); |
| op = (ObjectPointable) ObjectPointable.FACTORY.createPointable(); |
| sp1 = (SequencePointable) SequencePointable.FACTORY.createPointable(); |
| tvp1 = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable(); |
| } |
| |
| @Override |
| protected void evaluate(TaggedValuePointable[] args, IPointable result) throws SystemException { |
| TaggedValuePointable sequence = args[0]; |
| TaggedValuePointable keys = args[1]; |
| if (keys.getTag() != ValueTag.SEQUENCE_TAG && keys.getTag() != ValueTag.XS_STRING_TAG) { |
| throw new SystemException(ErrorCode.FORG0006); |
| } |
| TaggedValuePointable tempTvp = ppool.takeOne(TaggedValuePointable.class); |
| SequencePointable sp = ppool.takeOne(SequencePointable.class); |
| ArrayBackedValueStorage abvsKeys = abvsPool.takeOne(); |
| ArrayBackedValueStorage abvsResult = abvsPool.takeOne(); |
| try { |
| abvsResult.reset(); |
| sb.reset(abvsResult); |
| if (sequence.getTag() == ValueTag.SEQUENCE_TAG) { |
| sequence.getValue(sp); |
| for (int i = 0; i < sp.getEntryCount(); ++i) { |
| sp.getEntry(i, tempTvp); |
| if (tempTvp.getTag() == ValueTag.OBJECT_TAG) { |
| tempTvp.getValue(op); |
| op.getKeys(abvsKeys); |
| tempTvp.set(abvsKeys); |
| addPairs(tempTvp, keys); |
| } else { |
| sb.addItem(tempTvp); |
| } |
| } |
| } else if (sequence.getTag() == ValueTag.OBJECT_TAG) { |
| sequence.getValue(op); |
| addPairs(tempTvp, keys); |
| } else { |
| sb.addItem(sequence); |
| } |
| sb.finish(); |
| result.set(abvsResult); |
| } catch (IOException e) { |
| throw new SystemException(ErrorCode.SYSE0001, e); |
| } finally { |
| ppool.giveBack(tempTvp); |
| ppool.giveBack(sp); |
| abvsPool.giveBack(abvsResult); |
| abvsPool.giveBack(abvsKeys); |
| } |
| } |
| |
| protected void addPair(TaggedValuePointable tempTvp, TaggedValuePointable tempValue) |
| throws IOException, SystemException { |
| tempTvp.getValue(stringKey); |
| op.getValue(stringKey, tempValue); |
| ob.addItem(stringKey, tempValue); |
| } |
| |
| private void addPairs(TaggedValuePointable tvp2, TaggedValuePointable keys) throws IOException, SystemException { |
| ArrayBackedValueStorage abvs = abvsPool.takeOne(); |
| try { |
| op.getKeys(abvs); |
| tvp2.set(abvs); |
| if (tvp2.getTag() == ValueTag.XS_STRING_TAG) { |
| if (keyCheck(tvp2, keys)) { |
| abvs.reset(); |
| ob.reset(abvs); |
| addPair(tvp2, tvp1); |
| ob.finish(); |
| sb.addItem(abvs); |
| } |
| } else if (tvp2.getTag() == ValueTag.SEQUENCE_TAG) { |
| tvp2.getValue(sp1); |
| boolean found = false; |
| for (int j = 0; j < sp1.getEntryCount(); ++j) { |
| sp1.getEntry(j, tvp2); |
| if (keyCheck(tvp2, keys)) { |
| if (!found) { |
| abvs.reset(); |
| ob.reset(abvs); |
| found = true; |
| } |
| addPair(tvp2, tvp1); |
| } |
| } |
| if (found) { |
| ob.finish(); |
| sb.addItem(abvs); |
| } |
| } |
| } finally { |
| abvsPool.giveBack(abvs); |
| } |
| |
| } |
| |
| protected abstract boolean keyCheck(TaggedValuePointable objTvp, TaggedValuePointable keys) throws SystemException; |
| |
| protected boolean isKeyFound(TaggedValuePointable tvp, TaggedValuePointable keys) throws SystemException { |
| if (keys.getTag() == ValueTag.SEQUENCE_TAG) { |
| keys.getValue(sp1); |
| for (int i = 0; i < sp1.getEntryCount(); i++) { |
| sp1.getEntry(i, tvp1); |
| if (tvp1.getTag() != ValueTag.XS_STRING_TAG) { |
| throw new SystemException(ErrorCode.FORG0006); |
| } |
| if (FunctionHelper.arraysEqual(tvp1, tvp)) { |
| return true; |
| } |
| } |
| } else if (keys.getTag() == ValueTag.XS_STRING_TAG) { |
| if (FunctionHelper.arraysEqual(tvp, keys)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |