Examples with Iterator java.util.Iterator used on opensource projects

Example 11 with Iterator

use of java.util.Iterator in project groovy by apache.

the class SwingGroovyMethods method buildRowData.

private static Object[] buildRowData(DefaultTableModel delegate, Object row) {
    int cols = delegate.getColumnCount();
    Object[] rowData = new Object[cols];
    int i = 0;
    for (Iterator it = DefaultGroovyMethods.iterator(row); it.hasNext() && i < cols; ) {
        rowData[i++] = it.next();
    }
    return rowData;
}

Example 12 with Iterator

use of java.util.Iterator in project groovy by apache.

the class ManagedConcurrentLinkedQueueStressTest method testQueueRemoveCalledByMultipleThreadsOnSameElement.

@Test
public void testQueueRemoveCalledByMultipleThreadsOnSameElement() throws Exception {
    final Object value1 = new Object();
    final Object value2 = new Object();
    queue.add(value1);
    queue.add(value2);
    final int threadCount = 8;
    final CyclicBarrier barrier = new CyclicBarrier(threadCount + 1);
    for (int i = 0; i < threadCount; i++) {
        Thread t = new Thread(new Runnable() {

            @Override
            public void run() {
                Iterator<Object> itr = queue.iterator();
                Object o = itr.next();
                assertEquals(value1, o);
                ThreadUtils.await(barrier);
                itr.remove();
                ThreadUtils.await(barrier);
            }
        });
        t.setDaemon(true);
        t.start();
    }
    // start
    ThreadUtils.await(barrier);
    barrier.await(1L, TimeUnit.MINUTES);
    Iterator<Object> itr = queue.iterator();
    assertTrue(itr.hasNext());
    assertEquals(value2, itr.next());
    assertFalse(itr.hasNext());
}

Example 13 with Iterator

use of java.util.Iterator in project groovy by apache.

the class GPathResult method breadthFirst.

/**
     * Provides an Iterator over all the nodes of this GPathResult using a breadth-first traversal.
     *
     * @return the <code>Iterator</code> of (breadth-first) ordered GPathResults
     */
public Iterator breadthFirst() {
    return new Iterator() {

        private final List list = new LinkedList();

        private Iterator iter = iterator();

        private GPathResult next = getNextByBreadth();

        public boolean hasNext() {
            return this.next != null;
        }

        public Object next() {
            try {
                return this.next;
            } finally {
                this.next = getNextByBreadth();
            }
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }

        private GPathResult getNextByBreadth() {
            List children = new ArrayList();
            while (this.iter.hasNext() || !children.isEmpty()) {
                if (this.iter.hasNext()) {
                    final GPathResult node = (GPathResult) this.iter.next();
                    this.list.add(node);
                    this.list.add(this.iter);
                    children.add(node.children());
                } else {
                    List nextLevel = new ArrayList();
                    for (Object child : children) {
                        GPathResult next = (GPathResult) child;
                        Iterator iterator = next.iterator();
                        while (iterator.hasNext()) {
                            nextLevel.add(iterator.next());
                        }
                    }
                    this.iter = nextLevel.iterator();
                    children = new ArrayList();
                }
            }
            if (this.list.isEmpty()) {
                return null;
            } else {
                GPathResult result = (GPathResult) this.list.get(0);
                this.list.remove(0);
                this.iter = (Iterator) this.list.get(0);
                this.list.remove(0);
                return result;
            }
        }
    };
}

Example 14 with Iterator

use of java.util.Iterator in project groovy by apache.

the class GPathResult method depthFirst.

/**
     * Provides an Iterator over all the nodes of this GPathResult using a depth-first traversal.
     *
     * @return the <code>Iterator</code> of (depth-first) ordered GPathResults
     */
public Iterator depthFirst() {
    return new Iterator() {

        private final List list = new LinkedList();

        private final Stack stack = new Stack();

        private Iterator iter = iterator();

        private GPathResult next = getNextByDepth();

        public boolean hasNext() {
            return this.next != null;
        }

        public Object next() {
            try {
                return this.next;
            } finally {
                this.next = getNextByDepth();
            }
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }

        private GPathResult getNextByDepth() {
            while (this.iter.hasNext()) {
                final GPathResult node = (GPathResult) this.iter.next();
                this.list.add(node);
                this.stack.push(this.iter);
                this.iter = node.children().iterator();
            }
            if (this.list.isEmpty()) {
                return null;
            } else {
                GPathResult result = (GPathResult) this.list.get(0);
                this.list.remove(0);
                this.iter = (Iterator) this.stack.pop();
                return result;
            }
        }
    };
}

Example 15 with Iterator

use of java.util.Iterator in project groovy by apache.

the class GPathResult method getAt.

/**
     * Supports the subscript operator for a GPathResult.
     * <pre class="groovyTestCase">
     * import groovy.util.slurpersupport.*
     * def text = """
     * &lt;characterList&gt;
     *   &lt;character/&gt;
     *   &lt;character&gt;
     *     &lt;name>Gromit&lt;/name&gt;
     *   &lt;/character&gt;
     * &lt;/characterList&gt;"""
     *
     * GPathResult characterList = new XmlSlurper().parseText(text)
     *
     * assert characterList.character[1].name == 'Gromit'
     * </pre>
     * @param index an index
     * @return the value at the given index
     */
public Object getAt(final int index) {
    if (index < 0) {
        // calculate whole list in this case
        // recommend avoiding -ve's as this is obviously not as efficient
        List list = list();
        int adjustedIndex = index + list.size();
        if (adjustedIndex >= 0 && adjustedIndex < list.size())
            return list.get(adjustedIndex);
    } else {
        final Iterator iter = iterator();
        int count = 0;
        while (iter.hasNext()) {
            if (count++ == index) {
                return iter.next();
            } else {
                iter.next();
            }
        }
    }
    return new NoChildren(this, this.name, this.namespaceTagHints);
}