diff options
Diffstat (limited to 'gson/src/main/java/org/onap/policy/common/gson/internal')
7 files changed, 375 insertions, 4 deletions
diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/Adapter.java b/gson/src/main/java/org/onap/policy/common/gson/internal/Adapter.java index b4ef53f7..bb8672bb 100644 --- a/gson/src/main/java/org/onap/policy/common/gson/internal/Adapter.java +++ b/gson/src/main/java/org/onap/policy/common/gson/internal/Adapter.java @@ -86,12 +86,11 @@ public class Adapter { * * @param gson Gson object providing type adapters * @param accessor method used to access the item from within an object - * @param forGetter {@code true} if the name is for a "getter" method, {@code false} - * if for a "setter" * @param valueType the class of value on which this operates */ - public Adapter(Gson gson, Method accessor, boolean forGetter, Type valueType) { - this.propName = (forGetter ? detmGetterPropName(accessor) : detmSetterPropName(accessor)); + public Adapter(Gson gson, Method accessor, Type valueType) { + boolean forSetter = (accessor.getReturnType() == void.class); + this.propName = (forSetter ? detmSetterPropName(accessor) : detmGetterPropName(accessor)); this.reader = new ConvInfo(TypeToken.get(valueType)); this.gson = gson; this.fullName = getQualifiedName(accessor); diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/AnyGetterSerializer.java b/gson/src/main/java/org/onap/policy/common/gson/internal/AnyGetterSerializer.java new file mode 100644 index 00000000..da9ad173 --- /dev/null +++ b/gson/src/main/java/org/onap/policy/common/gson/internal/AnyGetterSerializer.java @@ -0,0 +1,83 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.common.gson.internal; + +import com.google.gson.Gson; +import com.google.gson.JsonElement; +import com.google.gson.JsonObject; +import com.google.gson.JsonParseException; +import java.lang.reflect.Method; +import java.util.Map.Entry; +import java.util.Set; + +/** + * Serializer for methods having a JsonAnyGetter annotation. + */ +public class AnyGetterSerializer extends Lifter implements Serializer { + + public static final String NOT_AN_OBJECT_ERR = "expecting a JsonObject for "; + + /** + * Constructs the object. + * + * @param gson Gson object providing type adapters + * @param propName property name associated with the lifted field + * @param unliftedProps property names that should not be lifted + * @param getter method used to get the item from within an object + */ + public AnyGetterSerializer(Gson gson, Set<String> unliftedProps, Method getter) { + super(gson, unliftedProps, getter, getter.getGenericReturnType()); + } + + @Override + public void addToTree(Object source, JsonObject target) { + // get the value from the object + Object value = invoke(source); + if (value == null) { + // nothing to lift + return; + } + + JsonElement inner = toJsonTree(value); + if (!inner.isJsonObject()) { + throw new JsonParseException(makeError(NOT_AN_OBJECT_ERR)); + } + + // lift items from inner into the target + copyLiftedItems(inner.getAsJsonObject(), target); + } + + /** + * Copies lifted items from one tree into another, without removing them from the + * source tree. + * + * @param source tree from which items are to be copied + * @param target tree into which items are to be copied + */ + private void copyLiftedItems(JsonObject source, JsonObject target) { + for (Entry<String, JsonElement> ent : source.entrySet()) { + String name = ent.getKey(); + if (shouldLift(name)) { + target.add(name, ent.getValue()); + } + } + } +} diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/AnySetterDeserializer.java b/gson/src/main/java/org/onap/policy/common/gson/internal/AnySetterDeserializer.java new file mode 100644 index 00000000..85d42dfa --- /dev/null +++ b/gson/src/main/java/org/onap/policy/common/gson/internal/AnySetterDeserializer.java @@ -0,0 +1,58 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.common.gson.internal; + +import com.google.gson.Gson; +import com.google.gson.JsonElement; +import com.google.gson.JsonObject; +import java.lang.reflect.Method; +import java.util.Map.Entry; +import java.util.Set; + +/** + * De-serializer for methods having a JsonAnySetter annotation. + */ +public class AnySetterDeserializer extends Lifter implements Deserializer { + + /** + * Constructs the object. + * + * @param gson Gson object providing type adapters + * @param unliftedProps property names that should not be lifted + * @param getter method used to get the item from within an object + */ + public AnySetterDeserializer(Gson gson, Set<String> unliftedProps, Method setter) { + super(gson, unliftedProps, setter, setter.getGenericParameterTypes()[1]); + } + + @Override + public void getFromTree(JsonObject source, Object target) { + for (Entry<String, JsonElement> ent : source.entrySet()) { + String name = ent.getKey(); + + if (shouldLift(name)) { + Object value = fromJsonTree(ent.getValue()); + invoke(target, name, value); + } + } + } + +} diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/Lifter.java b/gson/src/main/java/org/onap/policy/common/gson/internal/Lifter.java new file mode 100644 index 00000000..bb8ec321 --- /dev/null +++ b/gson/src/main/java/org/onap/policy/common/gson/internal/Lifter.java @@ -0,0 +1,62 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.common.gson.internal; + +import com.google.gson.Gson; +import java.lang.reflect.Method; +import java.lang.reflect.Type; +import java.util.Set; + +/** + * Super class of serializers and de-serializers that deal with "lifted" data, that is, + * data that is lifted from a nested json object into the containing object. + */ +public class Lifter extends MethodAdapter { + + /** + * Names of the properties that are <i>not</i> to be lifted. + */ + private final Set<String> unliftedProps; + + /** + * Constructs the object. + * + * @param gson Gson object providing type adapters + * @param unliftedProps property names that should not be lifted + * @param accessor method used to access the item from within an object + * @param type the class of value on which this operates + */ + public Lifter(Gson gson, Set<String> unliftedProps, Method accessor, Type type) { + super(gson, accessor, type); + + this.unliftedProps = unliftedProps; + } + + /** + * Determines if a property should be lifted. + * + * @param propName the name of the property + * @return {@code true} if the property should be lifted, {@code false} otherwise + */ + public boolean shouldLift(String propName) { + return !unliftedProps.contains(propName); + } +} diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/MethodAdapter.java b/gson/src/main/java/org/onap/policy/common/gson/internal/MethodAdapter.java new file mode 100644 index 00000000..579864da --- /dev/null +++ b/gson/src/main/java/org/onap/policy/common/gson/internal/MethodAdapter.java @@ -0,0 +1,69 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.common.gson.internal; + +import com.google.gson.Gson; +import com.google.gson.JsonParseException; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.lang.reflect.Type; + +/** + * Super class of adapters used to serialize and de-serialize a method. + */ +public class MethodAdapter extends Adapter { + + public static final String INVOKE_ERR = "cannot invoke method to serialize/deserialize: "; + + /** + * Method used to access the item within an object. + */ + private final Method accessor; + + /** + * Constructs the object. + * + * @param gson Gson object providing type adapters + * @param accessor method used to access the item from within an object + * @param type the class of value on which this operates + */ + public MethodAdapter(Gson gson, Method accessor, Type type) { + super(gson, accessor, type); + + this.accessor = accessor; + } + + /** + * Invokes the accessor method. + * + * @param self object on which to invoke the method + * @param args arguments to be passed to the method + * @return the method's result + */ + public Object invoke(Object self, Object... args) { + try { + return accessor.invoke(self, args); + + } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { + throw new JsonParseException(makeError(INVOKE_ERR), e); + } + } +} diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/MethodDeserializer.java b/gson/src/main/java/org/onap/policy/common/gson/internal/MethodDeserializer.java new file mode 100644 index 00000000..bb0724eb --- /dev/null +++ b/gson/src/main/java/org/onap/policy/common/gson/internal/MethodDeserializer.java @@ -0,0 +1,53 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.common.gson.internal; + +import com.google.gson.Gson; +import com.google.gson.JsonElement; +import com.google.gson.JsonObject; +import java.lang.reflect.Method; + +/** + * De-serializer for methods that are exposed. + */ +public class MethodDeserializer extends MethodAdapter implements Deserializer { + + /** + * Constructs the object. + * + * @param gson Gson object providing type adapters + * @param setter method used to set the item within an object + */ + public MethodDeserializer(Gson gson, Method setter) { + super(gson, setter, setter.getGenericParameterTypes()[0]); + } + + @Override + public void getFromTree(JsonObject source, Object target) { + JsonElement jsonEl = source.get(getPropName()); + if (jsonEl == null || jsonEl.isJsonNull()) { + return; + } + + invoke(target, fromJsonTree(jsonEl)); + } + +} diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/MethodSerializer.java b/gson/src/main/java/org/onap/policy/common/gson/internal/MethodSerializer.java new file mode 100644 index 00000000..ab544614 --- /dev/null +++ b/gson/src/main/java/org/onap/policy/common/gson/internal/MethodSerializer.java @@ -0,0 +1,47 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.common.gson.internal; + +import com.google.gson.Gson; +import com.google.gson.JsonObject; +import java.lang.reflect.Method; + +/** + * Serializer for methods that are exposed. + */ +public class MethodSerializer extends MethodAdapter implements Serializer { + + /** + * Constructs the object. + * + * @param gson Gson object providing type adapters + * @param getter method used to get the item from within an object + */ + public MethodSerializer(Gson gson, Method getter) { + super(gson, getter, getter.getGenericReturnType()); + } + + @Override + public void addToTree(Object source, JsonObject target) { + Object value = invoke(source); + target.add(getPropName(), (value == null ? null : toJsonTree(value))); + } +} |