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| 1 | +package io.getstream.client.model.beans; |
| 2 | + |
| 3 | +import com.google.common.collect.ImmutableList; |
| 4 | + |
| 5 | +import java.util.ArrayList; |
| 6 | +import java.util.List; |
| 7 | + |
| 8 | +/** |
| 9 | + * This class acts as container for a list of operations intended to alter the target(s) of a given activity. |
| 10 | + * A {@link Targets.Builder} is required in order to build a {@link Targets} object. |
| 11 | + * |
| 12 | + */ |
| 13 | +public class Targets { |
| 14 | + |
| 15 | + private ImmutableList<String> newTargets; |
| 16 | + private ImmutableList<String> addedTargets; |
| 17 | + private ImmutableList<String> removedTargets; |
| 18 | + |
| 19 | + public Targets(List<String> newTargets, List<String> addedTargets, List<String> removedTargets) { |
| 20 | + if (!newTargets.isEmpty()) { |
| 21 | + this.newTargets = ImmutableList.copyOf(newTargets); |
| 22 | + } |
| 23 | + |
| 24 | + if (!addedTargets.isEmpty()) { |
| 25 | + this.addedTargets = ImmutableList.copyOf(addedTargets); |
| 26 | + } |
| 27 | + |
| 28 | + if (!removedTargets.isEmpty()) { |
| 29 | + this.removedTargets = ImmutableList.copyOf(removedTargets); |
| 30 | + } |
| 31 | + } |
| 32 | + |
| 33 | + public List<String> getNewTargets() { |
| 34 | + return newTargets; |
| 35 | + } |
| 36 | + |
| 37 | + public List<String> getAddedTargets() { |
| 38 | + return addedTargets; |
| 39 | + } |
| 40 | + |
| 41 | + public List<String> getRemovedTargets() { |
| 42 | + return removedTargets; |
| 43 | + } |
| 44 | + |
| 45 | + /** |
| 46 | + * Builder class for the {@link Targets} object. |
| 47 | + */ |
| 48 | + public static class Builder { |
| 49 | + |
| 50 | + private List<String> newTargets = new ArrayList<>(); |
| 51 | + private List<String> addedTargets = new ArrayList<>(); |
| 52 | + private List<String> removedTargets = new ArrayList<>(); |
| 53 | + |
| 54 | + /** |
| 55 | + * Set a list of new target(s). |
| 56 | + * @param newTargets New target(s) |
| 57 | + * @return This builder |
| 58 | + */ |
| 59 | + public Builder setNewTargets(List<String> newTargets) { |
| 60 | + this.newTargets = newTargets; |
| 61 | + return this; |
| 62 | + } |
| 63 | + |
| 64 | + /** |
| 65 | + * Set a list of target(s) to add. |
| 66 | + * @param addedTargets Target(s) to add. |
| 67 | + * @return This builder |
| 68 | + */ |
| 69 | + public Builder setAddedTargets(List<String> addedTargets) { |
| 70 | + this.addedTargets = addedTargets; |
| 71 | + return this; |
| 72 | + } |
| 73 | + |
| 74 | + /** |
| 75 | + * Set a list of target(s) to be removed. |
| 76 | + * @param removedTargets Target(s) to be removed. |
| 77 | + * @return This builder |
| 78 | + */ |
| 79 | + public Builder setRemovedTargets(List<String> removedTargets) { |
| 80 | + this.removedTargets = removedTargets; |
| 81 | + return this; |
| 82 | + } |
| 83 | + |
| 84 | + /** |
| 85 | + * Change the existing target by specifying a new one. |
| 86 | + * @param target New target. |
| 87 | + * @return This builder |
| 88 | + */ |
| 89 | + public Builder addNewTarget(String target) { |
| 90 | + this.newTargets.add(target); |
| 91 | + return this; |
| 92 | + } |
| 93 | + |
| 94 | + /** |
| 95 | + * Add a new target to be added. |
| 96 | + * @param target Target to be added. |
| 97 | + * @return This builder |
| 98 | + */ |
| 99 | + public Builder addTargetToAdd(String target) { |
| 100 | + this.addedTargets.add(target); |
| 101 | + return this; |
| 102 | + } |
| 103 | + |
| 104 | + /** |
| 105 | + * Add a target to be removed. |
| 106 | + * @param target Target to be removed. |
| 107 | + * @return This builder |
| 108 | + */ |
| 109 | + public Builder addTargetToRemove(String target) { |
| 110 | + this.removedTargets.add(target); |
| 111 | + return this; |
| 112 | + } |
| 113 | + |
| 114 | + /** |
| 115 | + * Build a {@link Targets} object. |
| 116 | + * You can specify either new targets or added targets or removed targets or a combinations of added and removed targets. |
| 117 | + * @return A valid {@link Targets} object. |
| 118 | + */ |
| 119 | + public Targets build() { |
| 120 | + if (!newTargets.isEmpty() && (!addedTargets.isEmpty() || !removedTargets.isEmpty())) { |
| 121 | + throw new IllegalArgumentException("You can specify either new targets or added targets or removed targets or a combinations of added and removed targets."); |
| 122 | + } |
| 123 | + return new Targets(newTargets, addedTargets, removedTargets); |
| 124 | + } |
| 125 | + } |
| 126 | +} |
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