/*
 * Copyright (c) 2008, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.nativec.type;

import de.intarsys.nativec.api.INativeHandle;

/**
 * An {@link INativeObject} that represents a homogeneous (this means of equal
 * length and type) sequence of other {@link INativeObject} instances.
 */
public class NativeArray extends NativeObject {

	/** The meta class instance */
	public static final NativeArrayType META = new NativeArrayType(
			NativeVoid.META, 0);

	static {
		NativeType.register(NativeArray.class, META);
	}

	public static NativeArray create(INativeType baseType, int size) {
		NativeArrayType type = new NativeArrayType(baseType, size);
		return new NativeArray(type);
	}

	private INativeObject[] values;

	private NativeArrayType type;

	protected NativeArray(NativeArrayType type) {
		this.type = type;
		allocate();
	}

	protected NativeArray(NativeArrayType type, INativeHandle handle) {
		super(handle);
		this.type = type;
	}

	public INativeType getBaseType() {
		return type.getBaseType();
	}

	@Override
	public int getByteCount() {
		return type.getByteCount();
	}

	/**
	 * The {@link INativeObject} at index in the sequence (the index'th element
	 * of the array).
	 * 
	 * @param index
	 *            The index of the element to be reported.
	 * 
	 * @return The NativeObject at index
	 */
	synchronized public INativeObject getNativeObject(int index) {
		if (values == null) {
			values = new INativeObject[getSize()];
		}
		INativeObject result = values[index];
		if (result == null) {
			int elementOffset = index * type.getBaseSize();
			result = type.getBaseType().createNative(
					handle.offset(elementOffset));
			values[index] = result;
		}
		return result;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.graphic.freetype.NativeObject#getMetaClass()
	 */
	@Override
	public INativeType getNativeType() {
		return type;
	}

	/**
	 * The number of NativeObject instances in the sequence represented by this
	 * (in other terms the array size).
	 * 
	 * @return The number of NativeObject instances in the sequence represented
	 *         by this
	 */
	public int getSize() {
		return type.getArraySize();
	}

	public Object getValue() {
		throw new UnsupportedOperationException(
				"getValue not implemented for NativeArray");
	}

	public Object getValue(int index) {
		return getNativeObject(index).getValue();
	}

	public void setBaseType(INativeType baseType) {
		type = NativeArrayType.create(baseType, type.getArraySize());
		this.values = null;
		handle.setSize(getByteCount());
	}

	public void setSize(int size) {
		type = NativeArrayType.create(type.getBaseType(), size);
		this.values = null;
		handle.setSize(getByteCount());
	}

	public void setValue(int index, Object value) {
		getNativeObject(index).setValue(value);
	}

	public void setValue(Object value) {
		throw new UnsupportedOperationException(
				"setValue not implemented for NativeArray");
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.intarsys.graphic.freetype.NativeObject#toNestedString()
	 */
	@Override
	public String toNestedString() {
		return "[...]";
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append("[");
		for (int i = 0; i < getSize(); i++) {
			// NativeObject element = get(i);
			// sb.append(element.toString());
			// sb.append(", ");
		}
		sb.append("]");
		return sb.toString();
	}

}
