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DataArrayImpl.java
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DataArrayImpl.java
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/*
* Copyright 2008-2011 the original author or authors.
*
* 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 com.nominanuda.dataobject;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.nominanuda.code.Nullable;
import com.nominanuda.lang.Check;
public class DataArrayImpl extends AbstractDataStruct<Integer> implements DataArray {
private List<Object> l;
public DataArrayImpl() {
super(null);
l = createInnerList();
}
DataArrayImpl(AbstractDataStruct parent) {
super(parent);
l = createInnerList();
}
private DataArrayImpl(List<Object> o, AbstractDataStruct parent) {
super(parent);
l = o;
}
public int getLength() {
return l.size();
}
public Object put(Integer i, Object v) {
Object obj = isPrimitiveOrNull(v)
? v : ((AbstractDataStruct)v).cloneStruct(this);
l.set(ensureRoom(i),obj);
onMutate();
return obj;
}
public Object get(Integer i) {
return i >= l.size() ? null : l.get(i);
}
private int ensureRoom(int i) {
int len = l.size();
if(i >= len) {
int howMany = i - len + 1;
for(int j = 0; j < howMany; j++) {
l.add(null);
}
}
return i;
}
public Object remove(Integer i) {
Object o = l.remove((int)i);
if(o != null) {
onMutate();
}
return o;
}
public Object add(Object v) {
onMutate();
return put(getLength(), v);
}
public DataObject addNewObject() {
return putNewObject(getLength());
}
public DataArray addNewArray() {
return putNewArray(getLength());
}
public String getType() {
return DataType.array.name();
}
@Override
protected AbstractDataStruct<Integer> cloneStruct(
@Nullable AbstractDataStruct parent) {
List<Object> list = createInnerList();
DataArrayImpl res = new DataArrayImpl(list, parent);
int len = getLength();
for (int i = 0; i < len; i++) {
Object o = get(i);
if (isPrimitiveOrNull(o)) {
list.add(o);
} else {
list.add(((AbstractDataStruct)o).cloneStruct(res));
}
}
return res;
}
public boolean exists(Integer key) {
Check.notNull(key);
Check.illegalargument.assertTrue(key instanceof Integer);//TODO remove
int k = (Integer)key;
Check.illegalargument.assertFalse(k < 0);
return getLength() > k;
}
public List<Integer> getKeys() {
int len = getLength();
ArrayList<Integer> l = new ArrayList<Integer>(len);
for(int i = 0; i < len; i++) {
l.add(i);
}
return l;
}
@Override
public Iterator<Object> iterator() {
return l.iterator();
}
@Override
public DataArray with(Object val) {
add(val);
return this;
}
}