ProgressExpansion.java

/**
 *  Copyright 2012 Universitat Pompeu Fabra.
 *
 *  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.onexus.ui.api.progressbar;

import org.apache.wicket.MetaDataKey;
import org.apache.wicket.Session;
import org.onexus.resource.api.Progress;

import java.io.Serializable;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class ProgressExpansion implements Set<Progress>, Serializable {
    private static final long serialVersionUID = 1L;

    private static final MetaDataKey<ProgressExpansion> KEY = new MetaDataKey<ProgressExpansion>() {
        private static final long serialVersionUID = 1L;
    };

    private Set<String> ids = new HashSet<String>();

    private boolean inverse = false;

    public void expandAll() {
        ids.clear();

        inverse = true;
    }

    public void collapseAll() {
        ids.clear();

        inverse = false;
    }

    @Override
    public boolean add(Progress foo) {
        if (inverse) {
            return ids.remove(foo.getId());
        } else {
            return ids.add(foo.getId());
        }
    }

    @Override
    public boolean remove(Object o) {
        Progress foo = (Progress) o;

        if (inverse) {
            return ids.add(foo.getId());
        } else {
            return ids.remove(foo.getId());
        }
    }

    @Override
    public boolean contains(Object o) {
        Progress foo = (Progress) o;

        if (inverse) {
            return !ids.contains(foo.getId());
        } else {
            return ids.contains(foo.getId());
        }
    }

    @Override
    public void clear() {
        throw new UnsupportedOperationException();
    }

    @Override
    public int size() {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean isEmpty() {
        throw new UnsupportedOperationException();
    }

    @Override
    public <A> A[] toArray(A[] a) {
        throw new UnsupportedOperationException();
    }

    @Override
    public Iterator<Progress> iterator() {
        throw new UnsupportedOperationException();
    }

    @Override
    public Object[] toArray() {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean containsAll(Collection<?> c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean addAll(Collection<? extends Progress> c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean retainAll(Collection<?> c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean removeAll(Collection<?> c) {
        throw new UnsupportedOperationException();
    }

    /**
     * Get the expansion for the session.
     *
     * @return expansion
     */
    public static ProgressExpansion get() {
        ProgressExpansion expansion = Session.get().getMetaData(KEY);
        if (expansion == null) {
            expansion = new ProgressExpansion();

            Session.get().setMetaData(KEY, expansion);
        }
        return expansion;
    }

}