Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 1 | package org.apache.felix.dm.lambda.impl; |
| 2 | |
| 3 | import java.util.ArrayList; |
| 4 | import java.util.HashMap; |
| 5 | import java.util.List; |
| 6 | import java.util.Map; |
| 7 | import java.util.function.Consumer; |
| 8 | import java.util.stream.Stream; |
| 9 | |
| 10 | import org.apache.felix.dm.Component; |
| 11 | import org.apache.felix.dm.DependencyManager; |
| 12 | import org.apache.felix.dm.lambda.BundleAdapterBuilder; |
| 13 | import org.apache.felix.dm.lambda.ComponentBuilder; |
| 14 | import org.apache.felix.dm.lambda.callbacks.CbBundle; |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 15 | import org.apache.felix.dm.lambda.callbacks.CbBundleComponent; |
| 16 | import org.apache.felix.dm.lambda.callbacks.InstanceCbBundle; |
| 17 | import org.apache.felix.dm.lambda.callbacks.InstanceCbBundleComponent; |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 18 | import org.osgi.framework.Bundle; |
| 19 | |
| 20 | public class BundleAdapterBuilderImpl implements AdapterBase<BundleAdapterBuilder>, BundleAdapterBuilder { |
| 21 | private Consumer<ComponentBuilder<?>> m_compBuilder = (compBuilder -> {}); |
| 22 | protected final Map<Cb, List<MethodRef<Object>>> m_refs = new HashMap<>(); |
| 23 | private DependencyManager m_dm; |
| 24 | private boolean m_autoAdd; |
| 25 | private String m_added; |
| 26 | private String m_changed; |
| 27 | private String m_removed; |
| 28 | private String m_filter; |
| 29 | private int m_stateMask = -1; |
| 30 | private boolean m_propagate; |
| 31 | private Object m_callbackInstance; |
| 32 | private String m_add; |
| 33 | private String m_change; |
| 34 | private String m_remove; |
| 35 | |
| 36 | enum Cb { |
| 37 | ADD, |
| 38 | CHG, |
| 39 | REM |
| 40 | }; |
| 41 | |
| 42 | @FunctionalInterface |
| 43 | interface MethodRef<I> { |
| 44 | public void accept(I instance, Component c, Bundle b); |
| 45 | } |
| 46 | |
| 47 | public BundleAdapterBuilderImpl(DependencyManager dm) { |
| 48 | m_dm = dm; |
| 49 | } |
| 50 | |
| 51 | public void andThenBuild(Consumer<ComponentBuilder<?>> builder) { |
| 52 | m_compBuilder = m_compBuilder.andThen(builder); |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | public BundleAdapterBuilderImpl autoAdd(boolean autoAdd) { |
| 57 | m_autoAdd = autoAdd; |
| 58 | return this; |
| 59 | } |
| 60 | |
| 61 | public boolean isAutoAdd() { |
| 62 | return m_autoAdd; |
| 63 | } |
| 64 | |
| 65 | public BundleAdapterBuilder mask(int mask) { |
| 66 | m_stateMask = mask; |
| 67 | return this; |
| 68 | } |
| 69 | |
| 70 | public BundleAdapterBuilder filter(String filter) { |
| 71 | m_filter = filter; |
| 72 | return this; |
| 73 | } |
| 74 | |
| 75 | public BundleAdapterBuilder propagate(boolean propagate) { |
| 76 | m_propagate = propagate; |
| 77 | return this; |
| 78 | } |
| 79 | |
| 80 | public BundleAdapterBuilder propagate() { |
| 81 | m_propagate = true; |
| 82 | return this; |
| 83 | } |
| 84 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 85 | public BundleAdapterBuilder add(String callback) { |
| 86 | return callbacks(callback, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 87 | } |
| 88 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 89 | public BundleAdapterBuilder change(String callback) { |
| 90 | return callbacks(null, callback, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 91 | } |
| 92 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 93 | public BundleAdapterBuilder remove(String callback) { |
| 94 | return callbacks(null, null, callback); |
| 95 | } |
| 96 | |
| 97 | public BundleAdapterBuilder callbackInstance(Object callbackInstance) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 98 | m_callbackInstance = callbackInstance; |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 99 | return this; |
| 100 | } |
| 101 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 102 | private BundleAdapterBuilder callbacks(String add, String change, String remove) { |
| 103 | checkHasNoMethodRefs(); |
| 104 | m_add = add != null ? add : m_add; |
| 105 | m_change = change != null ? change : m_change; |
| 106 | m_remove = remove != null ? remove : m_remove; |
| 107 | return this; |
| 108 | } |
| 109 | |
| 110 | public <T> BundleAdapterBuilder add(CbBundle<T> add) { |
| 111 | return callbacks(add, (CbBundle<T>) null, (CbBundle<T>) null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 112 | } |
| 113 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 114 | public <T> BundleAdapterBuilder change(CbBundle<T> change) { |
| 115 | return callbacks(null, change, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 116 | } |
| 117 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 118 | public <T> BundleAdapterBuilder remove(CbBundle<T> remove) { |
| 119 | return callbacks(null, null, remove); |
| 120 | } |
| 121 | |
| 122 | private <T> BundleAdapterBuilder callbacks(CbBundle<T> add, CbBundle<T> change, CbBundle<T> remove) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 123 | if (add != null) { |
| 124 | Class<T> type = Helpers.getLambdaArgType(add, 0); |
| 125 | setComponentCallbackRef(Cb.ADD, type, (instance, component, bundle) -> { add.accept((T) instance, bundle); }); |
| 126 | } |
| 127 | if (change != null) { |
| 128 | Class<T> type = Helpers.getLambdaArgType(change, 0); |
| 129 | setComponentCallbackRef(Cb.CHG, type, (instance, component, bundle) -> { change.accept((T) instance, bundle); }); |
| 130 | } |
| 131 | if (remove != null) { |
| 132 | Class<T> type = Helpers.getLambdaArgType(remove, 0); |
| 133 | setComponentCallbackRef(Cb.REM, type, (instance, component, bundle) -> { remove.accept((T) instance, bundle); }); |
| 134 | } |
| 135 | return this; |
| 136 | } |
| 137 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 138 | public BundleAdapterBuilder add(InstanceCbBundle add) { |
| 139 | return callbacks(add, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 140 | } |
| 141 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 142 | public BundleAdapterBuilder change(InstanceCbBundle change) { |
| 143 | return callbacks(null, change, null); |
| 144 | } |
| 145 | |
| 146 | public BundleAdapterBuilder remove(InstanceCbBundle remove) { |
| 147 | return callbacks(null, null, remove); |
| 148 | } |
| 149 | |
| 150 | public BundleAdapterBuilder callbacks(InstanceCbBundle add, InstanceCbBundle change, InstanceCbBundle remove) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 151 | if (add != null) setInstanceCallbackRef(Cb.ADD, (instance, component, bundle) -> { add.accept(bundle); }); |
| 152 | if (change != null) setInstanceCallbackRef(Cb.CHG, (instance, component, bundle) -> { change.accept(bundle); }); |
| 153 | if (remove != null) setInstanceCallbackRef(Cb.REM, (instance, component, bundle) -> { remove.accept(bundle); }); |
| 154 | return this; |
| 155 | } |
| 156 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 157 | public <T> BundleAdapterBuilder add(CbBundleComponent<T> add) { |
| 158 | return callbacks(add, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 159 | } |
| 160 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 161 | public <T> BundleAdapterBuilder change(CbBundleComponent<T> change) { |
| 162 | return callbacks(null, change, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 163 | } |
| 164 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 165 | public <T> BundleAdapterBuilder remove(CbBundleComponent<T> remove) { |
| 166 | return callbacks(null, null, remove); |
| 167 | } |
| 168 | |
| 169 | public <T> BundleAdapterBuilder callbacks(CbBundleComponent<T> add, CbBundleComponent<T> change, CbBundleComponent<T> remove) { |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 170 | if (add != null) { |
| 171 | Class<T> type = Helpers.getLambdaArgType(add, 0); |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 172 | return setComponentCallbackRef(Cb.ADD, type, (instance, component, bundle) -> { add.accept((T) instance, bundle, component); }); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 173 | } |
| 174 | if (change != null) { |
| 175 | Class<T> type = Helpers.getLambdaArgType(change, 0); |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 176 | return setComponentCallbackRef(Cb.CHG, type, (instance, component, bundle) -> { change.accept((T) instance, bundle, component); }); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 177 | } |
| 178 | if (remove != null) { |
| 179 | Class<T> type = Helpers.getLambdaArgType(remove, 0); |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 180 | return setComponentCallbackRef(Cb.ADD, type, (instance, component, bundle) -> { remove.accept((T) instance, bundle, component); }); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 181 | } |
| 182 | return this; |
| 183 | } |
| 184 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 185 | public BundleAdapterBuilder add(InstanceCbBundleComponent add) { |
| 186 | return callbacks(add, null, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 187 | } |
| 188 | |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 189 | public BundleAdapterBuilder change(InstanceCbBundleComponent change) { |
| 190 | return callbacks(null, change, null); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 191 | } |
Pierre De Rop | 1152750 | 2016-02-18 21:07:16 +0000 | [diff] [blame^] | 192 | |
| 193 | public BundleAdapterBuilder remove(InstanceCbBundleComponent remove) { |
| 194 | return callbacks(null, null, remove); |
| 195 | } |
| 196 | |
| 197 | public BundleAdapterBuilder callbacks(InstanceCbBundleComponent add, InstanceCbBundleComponent change, InstanceCbBundleComponent remove) { |
| 198 | if (add != null) setInstanceCallbackRef(Cb.ADD, (instance, component, bundle) -> { add.accept(bundle, component); }); |
| 199 | if (change != null) setInstanceCallbackRef(Cb.CHG, (instance, component, bundle) -> { change.accept(bundle, component); }); |
| 200 | if (remove != null) setInstanceCallbackRef(Cb.REM, (instance, component, bundle) -> { remove.accept(bundle, component); }); |
Pierre De Rop | faca289 | 2016-01-31 23:27:05 +0000 | [diff] [blame] | 201 | return this; |
| 202 | } |
| 203 | |
| 204 | @Override |
| 205 | public Component build() { |
| 206 | Component c = null; |
| 207 | |
| 208 | if (m_refs.size() > 0) { |
| 209 | @SuppressWarnings("unused") |
| 210 | Object wrapCallback = new Object() { |
| 211 | public void add(Component comp, Bundle bundle) { |
| 212 | invokeMethodRefs(Cb.ADD, comp, bundle); |
| 213 | } |
| 214 | |
| 215 | public void change(Component comp, Bundle bundle) { |
| 216 | invokeMethodRefs(Cb.CHG, comp, bundle); |
| 217 | } |
| 218 | |
| 219 | public void remove(Component comp, Bundle bundle) { |
| 220 | invokeMethodRefs(Cb.REM, comp, bundle); |
| 221 | } |
| 222 | }; |
| 223 | c = m_dm.createBundleAdapterService(m_stateMask, m_filter, m_propagate, wrapCallback, "add", "change", "remove"); |
| 224 | } else { |
| 225 | c = m_dm.createBundleAdapterService(m_stateMask, m_filter, m_propagate, m_callbackInstance, m_add, m_change, m_remove); |
| 226 | } |
| 227 | ComponentBuilderImpl cb = new ComponentBuilderImpl(c, false); |
| 228 | m_compBuilder.accept (cb); |
| 229 | return cb.build(); |
| 230 | } |
| 231 | |
| 232 | private <U> BundleAdapterBuilder setInstanceCallbackRef(Cb cbType, MethodRef<U> ref) { |
| 233 | checkHasNoReflectionCallbacks(); |
| 234 | List<MethodRef<Object>> list = m_refs.computeIfAbsent(cbType, l -> new ArrayList<>()); |
| 235 | list.add((instance, component, bundle) -> ref.accept(null, component, bundle)); |
| 236 | return this; |
| 237 | } |
| 238 | |
| 239 | @SuppressWarnings("unchecked") |
| 240 | private <U> BundleAdapterBuilder setComponentCallbackRef(Cb cbType, Class<U> type, MethodRef<U> ref) { |
| 241 | checkHasNoReflectionCallbacks(); |
| 242 | List<MethodRef<Object>> list = m_refs.computeIfAbsent(cbType, l -> new ArrayList<>()); |
| 243 | list.add((instance, component, bundle) -> { |
| 244 | Object componentImpl = Stream.of(component.getInstances()) |
| 245 | .filter(impl -> Helpers.getClass(impl).equals(type)) |
| 246 | .findFirst() |
| 247 | .orElseThrow(() -> new IllegalStateException("The method reference " + ref + " does not match any available component impl classes.")); |
| 248 | ref.accept((U) componentImpl, component, bundle); |
| 249 | }); |
| 250 | return this; |
| 251 | } |
| 252 | |
| 253 | private void invokeMethodRefs(Cb cbType, Component comp, Bundle bundle) { |
| 254 | m_refs.computeIfPresent(cbType, (k, mrefs) -> { |
| 255 | mrefs.forEach(mref -> mref.accept(null, comp, bundle)); |
| 256 | return mrefs; |
| 257 | }); |
| 258 | } |
| 259 | |
| 260 | private void checkHasNoMethodRefs() { |
| 261 | if (m_refs.size() > 0) { |
| 262 | throw new IllegalStateException("Can't mix method references with reflection based callbacks"); |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | private void checkHasNoReflectionCallbacks() { |
| 267 | if (m_added != null || m_changed != null || m_removed != null) { |
| 268 | throw new IllegalStateException("Can't mix method references with reflection based callbacks"); |
| 269 | } |
| 270 | } |
| 271 | } |