com.ibm.common.geojson.GeometryCollection.java Source code

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Here is the source code for com.ibm.common.geojson.GeometryCollection.java

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/**
 * Copyright 2013 OpenSocial Foundation
 * Copyright 2013 International Business Machines Corporation
 *
 * 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.
 *
 * Utility library for working with Activity Streams Actions
 * Requires underscorejs.
 *
 * @author James M Snell (jasnell@us.ibm.com)
 */
package com.ibm.common.geojson;

import static com.ibm.common.geojson.BoundingBox.calculateBoundingBoxGeometries;

import java.io.ObjectStreamException;
import java.util.Iterator;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;

/**
 * A GeoJSON GeometryCollection object
 * see http://geojson.org/geojson-spec.html#geometry-collection
 * @author james
 *
 */
public final class GeometryCollection extends Geometry<GeometryCollection, Geometry<?, ?>> {

    public static final class Builder extends GeoObject.Builder<GeometryCollection, Builder> {

        private final ImmutableList.Builder<Geometry<?, ?>> list = ImmutableList.builder();

        public Builder() {
            type(GeoObject.Type.GEOMETRYCOLLECTION);
        }

        public Builder add(Geometry<?, ?> geometry, Geometry<?, ?>... geometries) {
            list.add(geometry);
            if (geometries != null)
                list.add(geometries);
            return this;
        }

        public Builder add(Iterable<Geometry<?, ?>> geometries) {
            list.addAll(geometries);
            return this;
        }

        @Override
        public void preGet() {
            set("geometries", list.build());
        }

        @Override
        public GeometryCollection doGet() {
            return new GeometryCollection(this);
        }
    }

    GeometryCollection(Builder builder) {
        super(builder);
    }

    public Iterable<Geometry<?, ?>> geometries() {
        return this.<Iterable<Geometry<?, ?>>>get("geometries", ImmutableList.<Geometry<?, ?>>of());
    }

    public int size() {
        return Iterables.size(geometries());
    }

    @SuppressWarnings("unchecked")
    public <G extends Geometry<?, ?>> G get(int idx) {
        return (G) Iterables.get(geometries(), idx);
    }

    public Iterator<Geometry<?, ?>> iterator() {
        return geometries().iterator();
    }

    @Override
    public GeometryCollection makeWithBoundingBox() {
        return new GeometryCollection.Builder().from(this).add(this)
                .boundingBox(calculateBoundingBoxGeometries(this)).get();
    }

    Object writeReplace() throws java.io.ObjectStreamException {
        return new SerializedForm(this);
    }

    private static class SerializedForm
            extends AbstractSerializedForm<GeometryCollection, GeometryCollection.Builder> {
        private static final long serialVersionUID = -2060301713159936281L;

        protected SerializedForm(GeometryCollection obj) {
            super(obj);
        }

        Object readResolve() throws ObjectStreamException {
            return doReadResolve();
        }

        @SuppressWarnings("unchecked")
        @Override
        protected boolean handle(Builder builder, String key, Object val) {
            if ("geometries".equals(key)) {
                Iterable<Geometry<?, ?>> list = (Iterable<Geometry<?, ?>>) val;
                builder.list.addAll(list);
                return true;
            }
            return false;
        }

        @Override
        protected GeometryCollection.Builder builder() {
            return GeoMakers.geometryCollection();
        }
    }
}