// =================================================================================================
// Copyright 2011 Twitter, Inc.
// -------------------------------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this work except in compliance with the License.
// You may obtain a copy of the License in the LICENSE file, or 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 com.twitter.common.thrift.text;
import java.util.Iterator;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
/**
* A parsing context used for Sequences (lists & sets). Maintains its
* child elements, and a pointer to the current one being parsed.
*
* @author Alex Roetter
*/
class SequenceContext extends BaseContext {
private final Iterator<JsonElement> children;
private JsonElement currentChild;
/**
* Create an iterator over the children. May be constructed with a null
* JsonArray if we only use it for writing.
*/
protected SequenceContext(JsonArray json) {
children = (null != json) ? json.iterator() : null;
}
@Override
protected void read() {
if (!children.hasNext()) {
throw new RuntimeException(
"Called SequenceContext.read() too many times!");
}
currentChild = children.next();
}
@Override
protected JsonElement getCurrentChild() {
return currentChild;
}
@Override
protected boolean hasMoreChildren() {
return children.hasNext();
}
}