// Copyright (c) 2009 The Chromium Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

package org.chromium.debug.core.model;

import java.util.ArrayList;

import java.util.List;

import java.util.SortedMap;

import org.chromium.sdk.JsArray;

import org.chromium.sdk.JsVariable;

import org.eclipse.debug.core.DebugException;

import org.eclipse.debug.core.model.IIndexedValue;

import org.eclipse.debug.core.model.IVariable;

/**

 * An IIndexedValue implementation for an array element range using a JsArray

 * instance.

 */

public class ArrayValue extends Value implements IIndexedValue {

  private final IVariable[] elements;

  public ArrayValue(IChromiumDebugTarget debugTarget, JsArray array) {

    super(debugTarget, array);

    this.elements = createElements();

  }

  private IVariable[] createElements() {

    SortedMap<Integer, ? extends JsVariable> elements = ((JsArray) getJsValue()).toSparseArray();

    List<IVariable> variables = new ArrayList<IVariable>(elements.size());

    for (JsVariable jsVar : elements.values()) {

      variables.add(new Variable(getDebugTarget(), jsVar, false));

    }

    return variables.toArray(new IVariable[variables.size()]);

  }

  public int getInitialOffset() {

    return 0;

  }

  public int getSize() throws DebugException {

    return elements.length;

  }

  public IVariable getVariable(int offset) throws DebugException {

    return elements[offset];

  }

  public IVariable[] getVariables(int offset, int length) throws DebugException {

    IVariable[] result = new IVariable[length];

    System.arraycopy(elements, offset, result, 0, length);

    return result;

  }

  @Override

  public IVariable[] getVariables() throws DebugException {

    return elements;

  }

  @Override

  public boolean hasVariables() throws DebugException {

    return elements.length > 0;

  }

}