/**
* 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.jdbc;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.drill.common.config.DrillConfig;
import org.apache.drill.common.logical.StorageEngineConfig;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Charsets;
import com.google.common.io.Resources;
public class StorageEngines implements Iterable<Map.Entry<String, StorageEngineConfig>>{
private Map<String, StorageEngineConfig> storage;
@JsonCreator
public StorageEngines(@JsonProperty("storage") Map<String, StorageEngineConfig> storage){
this.storage = storage;
}
public static void main(String[] args) throws Exception{
DrillConfig config = DrillConfig.create();
String data = Resources.toString(Resources.getResource("storage-engines.json"), Charsets.UTF_8);
StorageEngines se = config.getMapper().readValue(data, StorageEngines.class);
System.out.println(se);
}
@Override
public String toString() {
final int maxLen = 10;
return "StorageEngines [storage=" + (storage != null ? toString(storage.entrySet(), maxLen) : null) + "]";
}
@Override
public Iterator<Entry<String, StorageEngineConfig>> iterator() {
return storage.entrySet().iterator();
}
private String toString(Collection<?> collection, int maxLen) {
StringBuilder builder = new StringBuilder();
builder.append("[");
int i = 0;
for (Iterator<?> iterator = collection.iterator(); iterator.hasNext() && i < maxLen; i++) {
if (i > 0)
builder.append(", ");
builder.append(iterator.next());
}
builder.append("]");
return builder.toString();
}
}