inet.ipaddr.format.util.IPAddressPartStringCollection Maven / Gradle / Ivy
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/*
* Copyright 2016-2018 Sean C Foley
*
* 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
* or at
* https://github.com/seancfoley/IPAddress/blob/master/LICENSE
*
* 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 inet.ipaddr.format.util;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import inet.ipaddr.IPAddressSection.IPStringBuilderOptions;
import inet.ipaddr.format.string.AddressStringDivision;
import inet.ipaddr.format.string.IPAddressStringDivisionSeries;
/**
*
* @author sfoley
*
*/
public class IPAddressPartStringCollection extends IPAddressPartStringCollectionBase, IPAddressPartConfiguredString> {
private final List>> collections =
new ArrayList>>();
protected IPAddressPartStringCollection(){}
protected void add(IPAddressPartStringSubCollection> collection) {
this.collections.add(collection);
}
protected void addAll(IPAddressPartStringCollection collections) {
this.collections.addAll(collections.collections);
}
public int getPartCount() {
return collections.size();
}
public IPAddressStringDivisionSeries getPart(int index) {
return this.getSubCollection(index).part;
}
public IPAddressStringDivisionSeries[] getParts(IPAddressStringDivisionSeries[] array) {
int size = getPartCount();
IPAddressStringDivisionSeries result[];
if (array.length < size) {
result = (IPAddressStringDivisionSeries[]) Array.newInstance(array.getClass().getComponentType(), size);
} else {
result = array;
}
int i = 0;
for(IPAddressPartStringSubCollection coll : collections) {
result[i++] = coll.part;
}
return result;
}
public IPAddressPartStringSubCollection getSubCollection(IPAddressStringDivisionSeries part) {
for(IPAddressPartStringSubCollection sub : collections) {
if(sub.part.equals(part)) {
return sub;
}
}
return null;
}
public IPAddressPartStringSubCollection getSubCollection(int index) {
return collections.get(index);
}
@Override
public int size() {
int size = 0;
for(IPAddressPartStringSubCollection collection : collections) {
size += collection.size();
}
return size;
}
@Override
public Iterator> iterator() {
return new Iterator>() {
private int i;
private Iterator> currentIterator;
@Override
public boolean hasNext() {
while(true) {
if(currentIterator == null) {
if(i < collections.size()) {
currentIterator = collections.get(i++).iterator();
} else {
return false;
}
}
if(currentIterator.hasNext()) {
return true;
}
currentIterator = null;
}
}
@Override
public IPAddressPartConfiguredString next() {
if(hasNext()) {
return currentIterator.next();
}
throw new NoSuchElementException();
}
@Override
public void remove() {
if(currentIterator == null) {
throw new IllegalStateException();
}
currentIterator.remove();
}
};
}
/**
*
* @author sfoley
*
* @param the type of the address part from which this builder was derived
* @param the type of the params used to generate each string
* @param the type of the configurable strings, each of which pairs an IPAddressPart and a IPAddressPartStringParams to produce a string.
* @param the type of the collection produced by this builder
* @param the type of the options used by this builder to control which strings are produced
*/
protected static abstract class AddressPartStringBuilder<
T extends IPAddressStringDivisionSeries,
P extends IPAddressStringWriter,
S extends IPAddressPartConfiguredString,
C extends IPAddressPartStringSubCollection,
O extends IPStringBuilderOptions> {
//for each base, indicates the number of leading zeros that can be added for each segment
//so leadingZeros[16][1] indicates the leading zeros that can be added to the segment at index 1 when using base 16
protected static int MAX_BASE = 16;
private int leadingZeros[][];
protected final T addressSection;
protected final O options;
protected final C collection;
private boolean done;
protected AddressPartStringBuilder(T addressSection, O options, C collection) {
this.addressSection = addressSection;
this.options = options;
this.collection = collection;
}
public C getVariations() {
if(!done) {
synchronized(this) {
if(!done) {
done = true;
addAllVariations();
}
}
}
return collection;
}
protected abstract void addAllVariations();
protected void addStringParam(P stringParams) {
collection.add(stringParams);
}
protected boolean isExpandable(int radix) {
return isExpandable(radix, addressSection);
}
protected boolean isExpandableOutsideRange(int radix, int segmentIndex, int count) {
return isExpandableOutsideRange(radix, addressSection, segmentIndex, count);
}
private static boolean isExpandable(int radix, IPAddressStringDivisionSeries part) {
return isExpandableOutsideRange(radix, part, -1, 0);
}
private static boolean isExpandableOutsideRange(int radix, IPAddressStringDivisionSeries part, int segmentIndex, int count) {
int nextSegmentIndex = segmentIndex + count;
for(int i = 0; i < part.getDivisionCount(); i++) {
if(i >= segmentIndex && i < nextSegmentIndex) {
continue;
}
AddressStringDivision div = part.getDivision(i);
int digitCount = div.getDigitCount(radix);
int maxDigitCount = div.getMaxDigitCount(radix);
if(digitCount < maxDigitCount) {
return true;
}
}
return false;
}
protected int[] getExpandableSegments(int radix) {
int result[];
if(leadingZeros == null) {
leadingZeros = new int[MAX_BASE + 1][];
leadingZeros[radix] = result = getExpandableSegments(radix, addressSection);
} else {
if((result = leadingZeros[radix]) == null) {
leadingZeros[radix] = result = getExpandableSegments(radix, addressSection);
}
}
return result;
}
protected static int[] getExpandableSegments(int radix, IPAddressStringDivisionSeries part) {
int count = part.getDivisionCount();
int expandables[] = new int[count];
for(int i = 0; i < count; i++) {
AddressStringDivision div = part.getDivision(i);
int digitCount = div.getDigitCount(radix);
int maxDigitCount = div.getMaxDigitCount(radix);
if(digitCount < maxDigitCount) {
expandables[i] = maxDigitCount - digitCount;
} else {
expandables[i] = 0;
}
}
return expandables;
}
}
}