org.glassfish.jersey.internal.guava.AbstractIndexedListIterator Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of jaxrs-ri Show documentation

A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

There is a newer version: 3.1.6

Show newest version

/*
 * Copyright (C) 2009 The Guava 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 org.glassfish.jersey.internal.guava;

import java.util.ListIterator;
import java.util.NoSuchElementException;

import static org.glassfish.jersey.internal.guava.Preconditions.checkPositionIndex;

/**
 * This class provides a skeletal implementation of the {@link ListIterator}
 * interface across a fixed number of elements that may be retrieved by
 * position. It does not support {@link #remove}, {@link #set}, or {@link #add}.
 *
 * @author Jared Levy
 */
abstract class AbstractIndexedListIterator
        extends UnmodifiableListIterator {
    private final int size;
    private int position;

    /**
     * Constructs an iterator across a sequence of the given size with the given
     * initial position. That is, the first call to {@link #nextIndex()} will
     * return {@code position}, and the first call to {@link #next()} will return
     * the element at that index, if available. Calls to {@link #previous()} can
     * retrieve the preceding {@code position} elements.
     *
     * @throws IndexOutOfBoundsException if {@code position} is negative or is
     *                                   greater than {@code size}
     * @throws IllegalArgumentException  if {@code size} is negative
     */
    AbstractIndexedListIterator(int size, int position) {
        checkPositionIndex(position, size);
        this.size = size;
        this.position = position;
    }

    /**
     * Returns the element with the specified index. This method is called by
     * {@link #next()}.
     */
    protected abstract E get(int index);

    @Override
    public final boolean hasNext() {
        return position < size;
    }

    @Override
    public final E next() {
        if (!hasNext()) {
            throw new NoSuchElementException();
        }
        return get(position++);
    }

    @Override
    public final int nextIndex() {
        return position;
    }

    @Override
    public final boolean hasPrevious() {
        return position > 0;
    }

    @Override
    public final E previous() {
        if (!hasPrevious()) {
            throw new NoSuchElementException();
        }
        return get(--position);
    }

    @Override
    public final int previousIndex() {
        return position - 1;
    }
}