| /* |
| * 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.drill.exec.schema; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| import com.google.common.base.Predicate; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| |
| public class ObjectSchema implements RecordSchema { |
| private final Map<String, Field> fields; |
| |
| public ObjectSchema() { |
| fields = Maps.newHashMap(); |
| } |
| |
| @Override |
| public void addField(Field field) { |
| fields.put(field.getFieldName(), field); |
| } |
| |
| @Override |
| public Field getField(String fieldName, int index) { |
| return fields.get(fieldName); |
| } |
| |
| @Override |
| public void removeField(Field field, int index) { |
| fields.remove(field.getFieldName()); |
| } |
| |
| @Override |
| public Iterable<? extends Field> getFields() { |
| return fields.values(); |
| } |
| |
| @Override |
| public String toSchemaString() { |
| StringBuilder builder = new StringBuilder("Object_fields:["); |
| for (Field field : fields.values()) { |
| builder.append(field.toString()).append(" "); |
| } |
| builder.append("]"); |
| return builder.toString(); |
| } |
| |
| @Override |
| public void resetMarkedFields() { |
| for (Field field : fields.values()) { |
| field.setRead(false); |
| } |
| } |
| |
| @Override |
| public Iterable<? extends Field> removeUnreadFields() { |
| final List<Field> removedFields = Lists.newArrayList(); |
| Iterables.removeIf(fields.values(), new Predicate<Field>() { |
| @Override |
| public boolean apply(Field field) { |
| if (!field.isRead()) { |
| removedFields.add(field); |
| return true; |
| } else if (field.hasSchema()) { |
| Iterables.addAll(removedFields, field.getAssignedSchema().removeUnreadFields()); |
| } |
| |
| return false; |
| } |
| }); |
| return removedFields; |
| } |
| } |