/**
* Copyright 2014 Alexey Ragozin
*
* 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.
*/
package org.gridkit.jvmtool.heapdump;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.netbeans.lib.profiler.heap.Instance;
import org.netbeans.lib.profiler.heap.ObjectArrayInstance;
class ArrayIndexStep extends PathStep {
private final int index;
public ArrayIndexStep(int index) {
this.index = index;
}
@Override
public Iterator<Instance> walk(Instance instance) {
if (instance instanceof ObjectArrayInstance) {
ObjectArrayInstance array = (ObjectArrayInstance) instance;
if (index < 0) {
return array.getValues().iterator();
}
else {
if (array.getLength() > index) {
return Collections.singleton(array.getValues().get(index)).iterator();
}
else {
return Collections.<Instance>emptyList().iterator();
}
}
}
else {
return Collections.<Instance>emptyList().iterator();
}
}
@Override
public Iterator<Move> track(Instance instance) {
if (instance instanceof ObjectArrayInstance) {
ObjectArrayInstance array = (ObjectArrayInstance) instance;
if (index < 0) {
List<Move> result = new ArrayList<Move>();
int n = 0;
for(Instance i: array.getValues()) {
result.add(new Move("[" + n + "]", i));
++n;
}
return result.iterator();
}
else {
if (array.getLength() > index) {
return Collections.singleton(new Move("[" + index + "]", array.getValues().get(index))).iterator();
}
else {
return Collections.<Move>emptyList().iterator();
}
}
}
else {
return Collections.<Move>emptyList().iterator();
}
}
@Override
public String toString() {
return index < 0 ? "[*]" : "[" + index + "]";
}
}