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/*******************************************************************************
* ============LICENSE_START====================================================
* * org.onap.aaf
* * ===========================================================================
* * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* * ===========================================================================
* * Licensed 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.
* * ============LICENSE_END====================================================
* *
* * ECOMP is a trademark and service mark of AT&T Intellectual Property.
* *
******************************************************************************/
package org.onap.aaf.rosetta.marshal;
import java.util.Iterator;
import org.onap.aaf.rosetta.Ladder;
import org.onap.aaf.rosetta.Marshal;
import org.onap.aaf.rosetta.ParseException;
import org.onap.aaf.rosetta.Parsed;
/**
* Object Marshal
* Assumes has Fields and other Objects
* s
*
* @param <T>
*/
public abstract class ObjMarshal<T> extends Marshal<T> {
// Note: Not Using List or ArrayList, because there is no "Peek" concept in their iterator.
private Marshal<T>[] pml;
private int end=0;
/**
* @param pm
*/
@SuppressWarnings("unchecked")
protected void add(Marshal<T> pm) {
if(pml==null) {
pml = new Marshal[Ladder.DEFAULT_INIT_SIZE];
} else if(end>pml.length) {
Object temp[] = pml;
pml = new Marshal[pml.length+Ladder.DEFAULT_INIT_SIZE];
System.arraycopy(temp, 0, pml, 0, pml.length);
}
pml[end]=pm;
++end;
}
/* (non-Javadoc)
* @see com.att.rosetta.Parse#parse(java.lang.Object, com.att.rosetta.Parsed)
*/
@SuppressWarnings("unchecked")
@Override
public Parsed<State> parse(T in, Parsed<State> parsed) throws ParseException {
Ladder<Iterator<?>> ladder = parsed.state.ladder;
Iterator<Marshal<T>> iter = (Iterator<Marshal<T>>)ladder.peek();
if(iter==null) {
if(pml.length>0) {
ladder.push(new FieldsIterator());
parsed.event = START_OBJ;
} else {
ladder.push(DONE_ITERATOR);
}
} else if (DONE_ITERATOR.equals(iter)) {
} else {
FieldsIterator fields = (FieldsIterator)iter;
ladder.ascend(); // look at field info
Iterator<?> currFieldIter = ladder.peek();
Marshal<T> marshal;
if(currFieldIter==null) {
marshal=fields.next();
} else if(!DONE_ITERATOR.equals(currFieldIter)) {
marshal=fields.peek();
if(marshal==null && fields.hasNext())marshal=fields.next();
} else if(fields.hasNext()) {
marshal=fields.next();
ladder.push(null);
} else {
marshal=null;
}
if(marshal!=null)
parsed = marshal.parse(in, parsed);
ladder.descend();
if(marshal==null || parsed.event==NONE) {
parsed.event = END_OBJ;
ladder.push(DONE_ITERATOR);
}
}
return parsed; // if unchanged, then it will end process
}
private class FieldsIterator implements Iterator<Marshal<T>> {
private int idx = -1;
@Override
public boolean hasNext() {
return idx<end;
}
@Override
public Marshal<T> next() {
return pml[++idx];
}
public Marshal<T> peek() {
return idx<0?null:pml[idx];
}
@Override
public void remove() {
pml[idx]=null;
}
}
}
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