com.getperka.flatpack.ext.Property Maven / Gradle / Ivy
/*
* #%L
* FlatPack serialization code
* %%
* Copyright (C) 2012 Perka Inc.
* %%
* 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.
* #L%
*/
package com.getperka.flatpack.ext;
import static com.getperka.flatpack.util.FlatPackTypes.UTF8;
import static com.getperka.flatpack.util.FlatPackTypes.hasAnnotationWithSimpleName;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Comparator;
import java.util.Set;
import java.util.UUID;
import javax.annotation.security.DenyAll;
import javax.annotation.security.PermitAll;
import javax.inject.Inject;
import com.getperka.flatpack.BaseHasUuid;
import com.getperka.flatpack.InheritPrincipal;
import com.getperka.flatpack.JsonProperty;
import com.getperka.flatpack.SuppressDefaultValue;
/**
* An immutable view of a property that should be serialized.
*/
public class Property extends BaseHasUuid {
/**
* Constructs {@link Property} instances.
*/
static class Builder {
@Inject
private Property prop;
@Inject
private PropertySecurity security;
@Inject
private TypeContext typeContext;
Builder() {}
public Property build() {
Property toReturn = prop;
prop = null;
Method getter = toReturn.getGetter();
Method setter = toReturn.getSetter();
toReturn.setGetterRoleNames(preferEmpty(security.getGetterRoleNames(toReturn)));
toReturn.setSetterRoleNames(preferEmpty(security.getSetterRoleNames(toReturn)));
if (getter != null) {
java.lang.reflect.Type returnType = getter.getGenericReturnType();
toReturn.codex = typeContext.getCodex(returnType);
analyzeAnnotations(toReturn, getter);
} else if (setter != null) {
java.lang.reflect.Type paramType = setter.getGenericParameterTypes()[0];
toReturn.codex = typeContext.getCodex(paramType);
analyzeAnnotations(toReturn, setter);
} else {
throw new IllegalStateException("No getter or setter");
}
toReturn.type = toReturn.codex.describe();
return toReturn;
}
/**
* Returns the Property object under construction.
*/
public Property peek() {
return prop;
}
public Builder withDeepTraversalOnly(boolean only) {
prop.deepTraversalOnly = only;
return this;
}
public Builder withGetter(Method getter) {
getter.setAccessible(true);
prop.getter = getter;
if (prop.enclosingTypeName == null) {
Class enclosingType = getter.getDeclaringClass();
prop.enclosingTypeName = typeContext.getPayloadName(enclosingType);
}
return this;
}
public Builder withImpliedProperty(Property implied) {
prop.implied = implied;
return this;
}
public Builder withName(String name) {
prop.name = name;
return this;
}
public Builder withSetter(Method setter) {
setter.setAccessible(true);
prop.setter = setter;
if (prop.enclosingTypeName == null) {
Class enclosingType = setter.getDeclaringClass();
prop.enclosingTypeName = typeContext.getPayloadName(enclosingType);
}
return this;
}
private void analyzeAnnotations(Property toReturn, AnnotatedElement method) {
toReturn.embedded = hasAnnotationWithSimpleName(method, "Embedded");
toReturn.inheritPrincipal = method.isAnnotationPresent(InheritPrincipal.class);
toReturn.suppressDefaultValue = method.isAnnotationPresent(SuppressDefaultValue.class);
}
/**
* Convert {@link PropertySecurity#noRoleNames} into the empty set.
*/
private Set preferEmpty(Set set) {
return PropertySecurity.noRoleNames.equals(set) ? Collections. emptySet() : set;
}
}
/**
* Sorts Property objects by {@link #getName()}.
*/
public static final Comparator PROPERTY_NAME_COMPARATOR = new Comparator() {
@Override
public int compare(Property o1, Property o2) {
return o1.getName().compareTo(o2.getName());
}
};
private Codex codex;
private boolean deepTraversalOnly;
/**
* This property is mutable by external callers. It's kind of a hack to allow the describe
* endpoint to lazily add the doc strings.
*/
private String docString;
private String enclosingTypeName;
private boolean embedded;
private Method getter;
private Set getterRoleNames;
private Property implied;
private boolean inheritPrincipal;
private String name;
private Method setter;
private Set setterRoleNames;
private boolean suppressDefaultValue;
private Type type;
@Inject
private Property() {}
@DenyAll
public Codex getCodex() {
return codex;
}
@PermitAll
public String getDocString() {
return docString;
}
/**
* The payload name of the type that defines the property.
*/
@PermitAll
public String getEnclosingTypeName() {
return enclosingTypeName;
}
/**
* Returns the getter method for this Property. The returned method will have a non-{@code void}
* return type and no parameters.
*/
@DenyAll
public Method getGetter() {
return getter;
}
/**
* Returns the role names that are allowed to get the property. A value containing a single
* asterisk means that all roles may access the property.
*/
@PermitAll
public Set getGetterRoleNames() {
return getterRoleNames;
}
/**
* When a new value is assigned to the current property in some instance, the implied property of
* the new value should also be updated with the current instance.
*/
@PermitAll
public Property getImpliedProperty() {
return implied;
}
/**
* Returns the json payload name of the Property, which may differ from the bean name if a
* {@link JsonProperty} annotation has been applied to the getter.
*/
@PermitAll
public String getName() {
return name;
}
/**
* Returns the optional setter for the property. The returned method will have a single parameter
* and a {@code void} return type.
*/
@DenyAll
public Method getSetter() {
return setter;
}
/**
* Return the role names that are allowed to set this property. A value containing a single
* asterisk means that all roles may set the property.
*/
@PermitAll
public Set getSetterRoleNames() {
return setterRoleNames;
}
/**
* A simplified description of the property's type.
*/
@PermitAll
public Type getType() {
return type;
}
/**
* Returns {@code true} if the Property should be included only during a deep traversal.
*/
@PermitAll
public boolean isDeepTraversalOnly() {
return deepTraversalOnly;
}
/**
* Returns {@code true} if an entity Property's properties should be emitted into the owning
* entity's properties.
*/
@PermitAll
public boolean isEmbedded() {
return embedded;
}
/**
* Returns {@code true} if the referred entity's owner should also be considered an owner of the
* entity that defines the Property.
*/
@PermitAll
public boolean isInheritPrincipal() {
return inheritPrincipal;
}
/**
* If {@code true}, non-null properties that contain the property type's default value will not be
* serialized. For example, integer properties whose values are {@code 0} will not be serialized.
*/
@PermitAll
public boolean isSuppressDefaultValue() {
return suppressDefaultValue;
}
public void setDocString(String docString) {
this.docString = docString;
}
/**
* For debugging use only.
*/
@Override
public String toString() {
return getEnclosingTypeName() + "." + getName() + " ::= " + getType();
}
@Override
protected UUID defaultUuid() {
if (getEnclosingTypeName() == null || getName() == null) {
throw new IllegalStateException();
}
return UUID.nameUUIDFromBytes((getEnclosingTypeName() + "." + getName()).getBytes(UTF8));
}
void setDeepTraversalOnly(boolean deepTraversalOnly) {
this.deepTraversalOnly = deepTraversalOnly;
}
void setEmbedded(boolean embedded) {
this.embedded = embedded;
}
void setEnclosingTypeName(String enclosingTypeName) {
this.enclosingTypeName = enclosingTypeName;
}
void setGetterRoleNames(Set names) {
this.getterRoleNames = names;
}
void setImplied(Property implied) {
this.implied = implied;
}
/**
* Use for late fixups of implied properties when the OneToMany property is examined after the
* ManyToOne relationship.
*/
void setImpliedProperty(Property implied) {
this.implied = implied;
}
void setInheritPrincipal(boolean inheritPrincipal) {
this.inheritPrincipal = inheritPrincipal;
}
void setName(String name) {
this.name = name;
}
void setSetterRoleNames(Set names) {
this.setterRoleNames = names;
}
void setSuppressDefaultValue(boolean suppressDefaultValue) {
this.suppressDefaultValue = suppressDefaultValue;
}
void setType(Type type) {
this.type = type;
}
}