147 lines
3.9 KiB
Java
147 lines
3.9 KiB
Java
/**
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* Copyright 2013 OpenSocial Foundation
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* Copyright 2013 International Business Machines Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Utility library for working with Activity Streams Actions
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* Requires underscorejs.
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*
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* @author James M Snell (jasnell@us.ibm.com)
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*/
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package com.ibm.common.geojson;
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import static com.google.common.base.Preconditions.checkArgument;
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import static com.ibm.common.geojson.BoundingBox.calculateBoundingBoxLineStrings;
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import java.io.ObjectStreamException;
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import java.util.Iterator;
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import com.google.common.base.Supplier;
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import com.google.common.collect.ImmutableList;
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import com.ibm.common.geojson.Geometry.CoordinateGeometry;
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/**
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* A GeoJSON Polygon object
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* see http://geojson.org/geojson-spec.html#polygon
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* @author james
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*
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*/
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public final class Polygon
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extends CoordinateGeometry<Polygon,LineString, Iterable<LineString>> {
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public static final class Builder
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extends CoordinateGeometry.Builder<LineString, Iterable<LineString>, Polygon, Builder> {
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private final ImmutableList.Builder<LineString> strings =
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ImmutableList.builder();
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public Builder() {
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type(Type.POLYGON);
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}
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/**
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* Add one or more LineStrings
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* @param line LineString
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* @param lines LineString[] optional vararg
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* @return Builder
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*/
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public Builder add(LineString line, LineString... lines) {
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checkArgument(line.linearRing(), "Polygon coordinates MUST be Linear Rings");
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// TODO: Check hole requirement
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this.strings.add(line);
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if (lines != null)
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for (LineString l : lines)
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add(l);
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return this;
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}
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/**
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* Add a LineString
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* @param line Supplier<LineString>
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* @return Builder
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*/
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public Builder add(Supplier<LineString> line) {
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return add(line.get());
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}
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/**
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* Add one or more LineStrings
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* @param lines Iterable<LineString>
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* @return Builder
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*/
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public Builder add(Iterable<LineString> lines) {
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this.strings.addAll(lines);
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return this;
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}
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public Polygon doGet() {
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return new Polygon(this);
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}
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@Override
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protected Iterable<LineString> coordinates() {
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return strings.build();
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}
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}
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protected Polygon(
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Builder builder) {
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super(builder);
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}
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@Override
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public Iterator<LineString> iterator() {
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return coordinates().iterator();
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}
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@Override
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protected Polygon makeWithBoundingBox() {
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return new Polygon.Builder()
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.from(this)
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.add(this)
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.boundingBox(
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calculateBoundingBoxLineStrings(this)).get();
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}
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Object writeReplace() throws java.io.ObjectStreamException {
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return new SerializedForm(this);
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}
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private static class SerializedForm
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extends AbstractSerializedForm<Polygon,Builder> {
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private static final long serialVersionUID = -2060301713159936281L;
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protected SerializedForm(Polygon obj) {
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super(obj);
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}
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Object readResolve() throws ObjectStreamException {
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return doReadResolve();
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}
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@SuppressWarnings("unchecked")
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@Override
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protected boolean handle(Builder builder, String key, Object val) {
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if ("coordinates".equals(key)) {
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Iterable<LineString> list = (Iterable<LineString>) val;
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builder.strings.addAll(list);
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return true;
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}
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return false;
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}
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@Override
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protected Polygon.Builder builder() {
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return GeoMakers.polygon();
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}
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}
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}
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