Mercurial > jdk8-mips64-public > jaxws / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/bind/v2/util/FlattenIterator.java	Wed Apr 27 01:27:09 2016 +0800
     1.3 @@ -0,0 +1,81 @@
     1.4 +/*
     1.5 + * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.  Oracle designates this
    1.11 + * particular file as subject to the "Classpath" exception as provided
    1.12 + * by Oracle in the LICENSE file that accompanied this code.
    1.13 + *
    1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.16 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.17 + * version 2 for more details (a copy is included in the LICENSE file that
    1.18 + * accompanied this code).
    1.19 + *
    1.20 + * You should have received a copy of the GNU General Public License version
    1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.23 + *
    1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.25 + * or visit www.oracle.com if you need additional information or have any
    1.26 + * questions.
    1.27 + */
    1.28 +
    1.29 +package com.sun.xml.internal.bind.v2.util;
    1.30 +
    1.31 +import java.util.Iterator;
    1.32 +import java.util.Map;
    1.33 +import java.util.NoSuchElementException;
    1.34 +
    1.35 +/**
    1.36 + * {@link Iterator} that walks over a map of maps.
    1.37 + *
    1.38 + * @author Kohsuke Kawaguchi
    1.39 + * @since 2.0
    1.40 + */
    1.41 +public final class FlattenIterator<T> implements Iterator<T> {
    1.42 +
    1.43 +    private final Iterator<? extends Map<?,? extends T>> parent;
    1.44 +    private Iterator<? extends T> child = null;
    1.45 +    private T next;
    1.46 +
    1.47 +    public FlattenIterator( Iterable<? extends Map<?,? extends T>> core ) {
    1.48 +        this.parent = core.iterator();
    1.49 +    }
    1.50 +
    1.51 +
    1.52 +    public void remove() {
    1.53 +        throw new UnsupportedOperationException();
    1.54 +    }
    1.55 +
    1.56 +    public boolean hasNext() {
    1.57 +        getNext();
    1.58 +        return next!=null;
    1.59 +    }
    1.60 +
    1.61 +    public T next() {
    1.62 +        T r = next;
    1.63 +        next = null;
    1.64 +        if(r==null)
    1.65 +            throw new NoSuchElementException();
    1.66 +        return r;
    1.67 +    }
    1.68 +
    1.69 +    private void getNext() {
    1.70 +        if(next!=null)  return;
    1.71 +
    1.72 +        if(child!=null && child.hasNext()) {
    1.73 +            next = child.next();
    1.74 +            return;
    1.75 +        }
    1.76 +        // child is empty
    1.77 +        if(parent.hasNext()) {
    1.78 +            child = parent.next().values().iterator();
    1.79 +            getNext();
    1.80 +        }
    1.81 +        // else
    1.82 +        //      no more object
    1.83 +    }
    1.84 +}