tikhomirov@674: /*
tikhomirov@674:  * Copyright (c) 2013 TMate Software Ltd
tikhomirov@674:  *  
tikhomirov@674:  * This program is free software; you can redistribute it and/or modify
tikhomirov@674:  * it under the terms of the GNU General Public License as published by
tikhomirov@674:  * the Free Software Foundation; version 2 of the License.
tikhomirov@674:  *
tikhomirov@674:  * This program is distributed in the hope that it will be useful,
tikhomirov@674:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@674:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@674:  * GNU General Public License for more details.
tikhomirov@674:  *
tikhomirov@674:  * For information on how to redistribute this software under
tikhomirov@674:  * the terms of a license other than GNU General Public License
tikhomirov@674:  * contact TMate Software at support@hg4j.com
tikhomirov@674:  */
tikhomirov@674: package org.tmatesoft.hg.internal;
tikhomirov@674: 
tikhomirov@674: import java.util.Iterator;
tikhomirov@674: import java.util.NoSuchElementException;
tikhomirov@674: 
tikhomirov@674: /**
tikhomirov@674:  * 
tikhomirov@674:  * @author Artem Tikhomirov
tikhomirov@674:  * @author TMate Software Ltd.
tikhomirov@674:  */
tikhomirov@680: public final class IntSliceSeq implements Iterable<IntTuple>, Cloneable {
tikhomirov@674: 	private final IntVector slices;
tikhomirov@674: 	private final int slice;
tikhomirov@674: 
tikhomirov@674: 	public IntSliceSeq(int sliceSize) {
tikhomirov@674: 		// initial size/grow values are pure guess
tikhomirov@674: 		this(sliceSize, 10, 5);
tikhomirov@674: 	}
tikhomirov@674: 	
tikhomirov@674: 	public IntSliceSeq(int sliceSize, int initialSlices, int slicesToGrow) {
tikhomirov@674: 		slices = new IntVector(sliceSize * initialSlices, sliceSize*slicesToGrow);
tikhomirov@674: 		slice = sliceSize;
tikhomirov@674: 	}
tikhomirov@674: 	
tikhomirov@674: 	public IntSliceSeq add(int... values) {
tikhomirov@680: 		checkValuesAny(values);
tikhomirov@674: 		slices.add(values);
tikhomirov@674: 		return this;
tikhomirov@674: 	}
tikhomirov@674: 	
tikhomirov@674: 	public IntSliceSeq set(int sliceIndex, int... values) {
tikhomirov@680: 		checkValuesExact(values);
tikhomirov@674: 		for (int i = 0, j = sliceIndex*slice; i < slice; i++,j++) {
tikhomirov@674: 			slices.set(j, values[i]);
tikhomirov@674: 		}
tikhomirov@674: 		return this;
tikhomirov@674: 	}
tikhomirov@674: 	
tikhomirov@674: 	public IntTuple get(int sliceIndex) {
tikhomirov@674: 		checkArgRange(size(), sliceIndex);
tikhomirov@674: 		return new IntTuple(slice).set(slices, sliceIndex*slice);
tikhomirov@674: 	}
tikhomirov@674: 	
tikhomirov@674: 	public int get(int sliceIndex, int valueIndex) {
tikhomirov@674: 		checkArgRange(size(), sliceIndex);
tikhomirov@674: 		checkArgRange(slice, valueIndex);
tikhomirov@674: 		return slices.get(sliceIndex*slice + valueIndex);
tikhomirov@674: 	}
tikhomirov@674: 	
tikhomirov@680: 	public void addAll(IntSliceSeq other) {
tikhomirov@680: 		if (other.slice != this.slice) {
tikhomirov@680: 			throw new IllegalArgumentException(String.format("Tuple size doesn't match: %d and %d", slice, other.slice));
tikhomirov@680: 		}
tikhomirov@680: 		slices.addAll(other.slices);
tikhomirov@680: 	}
tikhomirov@680: 	
tikhomirov@674: 	public int size() {
tikhomirov@674: 		return slices.size() / slice;
tikhomirov@674: 	}
tikhomirov@674: 	
tikhomirov@674: 	public int sliceSize() {
tikhomirov@674: 		return slice;
tikhomirov@674: 	}
tikhomirov@674: 
tikhomirov@674: 	public void clear() {
tikhomirov@674: 		slices.clear();
tikhomirov@674: 	}
tikhomirov@674: 
tikhomirov@674: 	public IntTuple last() {
tikhomirov@674: 		int lastElementIndex = (size() - 1);
tikhomirov@674: 		if (lastElementIndex < 0) {
tikhomirov@674: 			throw new NoSuchElementException();
tikhomirov@674: 		}
tikhomirov@674: 		return get(lastElementIndex);
tikhomirov@674: 	}
tikhomirov@674: 
tikhomirov@674: 	public Iterator<IntTuple> iterator() {
tikhomirov@674: 		return new Iterator<IntTuple>() {
tikhomirov@674: 			private final IntTuple t = new IntTuple(slice);
tikhomirov@674: 			private int next = 0;
tikhomirov@674: 
tikhomirov@674: 			public boolean hasNext() {
tikhomirov@674: 				return next < size();
tikhomirov@674: 			}
tikhomirov@674: 
tikhomirov@674: 			public IntTuple next() {
tikhomirov@674: 				return t.set(slices, next++*slice);
tikhomirov@674: 			}
tikhomirov@674: 
tikhomirov@674: 			public void remove() {
tikhomirov@674: 				throw new UnsupportedOperationException();
tikhomirov@674: 			}
tikhomirov@674: 		};
tikhomirov@674: 	}
tikhomirov@679: 	
tikhomirov@679: 	@Override
tikhomirov@679: 	public String toString() {
tikhomirov@679: 		StringBuilder sb = new StringBuilder();
tikhomirov@679: 		for (int i = 0; i < size(); i++) {
tikhomirov@679: 			sb.append('(');
tikhomirov@679: 			for (int j = 0; j < slice; j++) {
tikhomirov@679: 				sb.append(slices.get(i*slice + j));
tikhomirov@679: 				sb.append(',');
tikhomirov@679: 			}
tikhomirov@679: 			sb.setLength(sb.length() - 1);
tikhomirov@679: 			sb.append(')');
tikhomirov@679: 			sb.append(' ');
tikhomirov@679: 		}
tikhomirov@679: 		return sb.toString();
tikhomirov@679: 	}
tikhomirov@680: 	
tikhomirov@680: 	@Override
tikhomirov@680: 	public IntSliceSeq clone() {
tikhomirov@680: 		try {
tikhomirov@680: 			return (IntSliceSeq) super.clone();
tikhomirov@680: 		} catch (CloneNotSupportedException ex) {
tikhomirov@680: 			throw new Error(ex);
tikhomirov@680: 		}
tikhomirov@680: 	}
tikhomirov@674: 
tikhomirov@674: 	private void checkArgRange(int rangeSize, int index) {
tikhomirov@674: 		if (index >= 0 && index < rangeSize) {
tikhomirov@674: 			return;
tikhomirov@674: 		}
tikhomirov@674: 		throw new IllegalArgumentException(String.valueOf(index));
tikhomirov@674: 	}
tikhomirov@680: 	private void checkValuesExact(int[] values) {
tikhomirov@674: 		if (values == null || values.length != slice) {
tikhomirov@674: 			throw new IllegalArgumentException(String.valueOf(values == null ? values : values.length));
tikhomirov@674: 		}
tikhomirov@674: 	}
tikhomirov@680: 	private void checkValuesAny(int[] values) {
tikhomirov@680: 		if (values == null || values.length % slice != 0) {
tikhomirov@680: 			throw new IllegalArgumentException(String.valueOf(values == null ? values : values.length));
tikhomirov@680: 		}
tikhomirov@680: 	}
tikhomirov@674: }