Move several Dependency Injectors into the API

This commit is contained in:
James Seibel
2022-09-13 21:38:57 -05:00
parent cceb2c38e4
commit f6a1901ef8
42 changed files with 114 additions and 77 deletions
@@ -1,7 +1,7 @@
package com.seibel.lod.api.items.interfaces.override;
import com.seibel.lod.core.dependencyInjection.IBindable;
import com.seibel.lod.core.dependencyInjection.IOverrideInjector;
import com.seibel.lod.core.interfaces.dependencyInjection.IBindable;
import com.seibel.lod.core.interfaces.dependencyInjection.IOverrideInjector;
/**
* Implemented by all DhApi objects that can be overridden.
@@ -1,6 +1,6 @@
package com.seibel.lod.api.methods.events.interfaces;
import com.seibel.lod.core.dependencyInjection.IBindable;
import com.seibel.lod.core.interfaces.dependencyInjection.IBindable;
/**
* A combination of all interfaces required by all
@@ -0,0 +1,212 @@
/*
* This file is part of the Distant Horizons mod (formerly the LOD Mod),
* licensed under the GNU LGPL v3 License.
*
* Copyright (C) 2020-2022 James Seibel
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.seibel.lod.core.DependencyInjection;
import com.seibel.lod.core.interfaces.dependencyInjection.IBindable;
import com.seibel.lod.core.interfaces.dependencyInjection.IDependencyInjector;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
/**
* This class takes care of tracking objects used in dependency injection.
*
* @param <BindableType> extends IBindable and defines what interfaces this dependency handler can deal with.
* @author James Seibel
* @version 2022-8-15
*/
public class DependencyInjector<BindableType extends IBindable> implements IDependencyInjector<BindableType>
{
protected final Map<Class<? extends BindableType>, ArrayList<BindableType>> dependencies = new HashMap<>();
/** Internal class reference to BindableType since we can't get it any other way. */
protected final Class<? extends BindableType> bindableInterface;
protected final boolean allowDuplicateBindings;
public DependencyInjector(Class<BindableType> newBindableInterface)
{
this.bindableInterface = newBindableInterface;
this.allowDuplicateBindings = false;
}
public DependencyInjector(Class<BindableType> newBindableInterface, boolean newAllowDuplicateBindings)
{
this.bindableInterface = newBindableInterface;
this.allowDuplicateBindings = newAllowDuplicateBindings;
}
@Override
public void bind(Class<? extends BindableType> dependencyInterface, BindableType dependencyImplementation) throws IllegalStateException, IllegalArgumentException
{
// duplicate check if requested
if (dependencies.containsKey(dependencyInterface) && !this.allowDuplicateBindings)
{
throw new IllegalStateException("The dependency [" + dependencyInterface.getSimpleName() + "] has already been bound.");
}
// make sure the given dependency implements the necessary interfaces
boolean implementsInterface = checkIfClassImplements(dependencyImplementation.getClass(), dependencyInterface)
|| checkIfClassExtends(dependencyImplementation.getClass(), dependencyInterface);
boolean implementsBindable = checkIfClassImplements(dependencyImplementation.getClass(), this.bindableInterface);
// display any errors
if (!implementsInterface)
{
throw new IllegalArgumentException("The dependency [" + dependencyImplementation.getClass().getSimpleName() + "] doesn't implement or extend: [" + dependencyInterface.getSimpleName() + "].");
}
if (!implementsBindable)
{
throw new IllegalArgumentException("The dependency [" + dependencyImplementation.getClass().getSimpleName() + "] doesn't implement the interface: [" + IBindable.class.getSimpleName() + "].");
}
// make sure the hashSet has an array to hold the dependency
if (!dependencies.containsKey(dependencyInterface))
{
dependencies.put(dependencyInterface, new ArrayList<BindableType>());
}
// add the dependency
dependencies.get(dependencyInterface).add(dependencyImplementation);
}
@Override
public boolean checkIfClassImplements(Class<?> classToTest, Class<?> interfaceToLookFor)
{
// check the parent class (if applicable)
if (classToTest.getSuperclass() != Object.class && classToTest.getSuperclass() != null)
{
if (checkIfClassImplements(classToTest.getSuperclass(), interfaceToLookFor))
{
return true;
}
}
// check interfaces
for (Class<?> implementationInterface : classToTest.getInterfaces())
{
// recurse to check interface parents if necessary
if (implementationInterface.getInterfaces().length != 0)
{
if (checkIfClassImplements(implementationInterface, interfaceToLookFor))
{
return true;
}
}
if (implementationInterface.equals(interfaceToLookFor))
{
return true;
}
}
return false;
}
@Override
public boolean checkIfClassExtends(Class<?> classToTest, Class<?> extensionToLookFor)
{
return extensionToLookFor.isAssignableFrom(classToTest);
}
@SuppressWarnings("unchecked")
@Override
public <T extends BindableType> T get(Class<T> interfaceClass) throws ClassCastException
{
return (T) getInternalLogic(interfaceClass, false).get(0);
}
@Override
public <T extends BindableType> ArrayList<T> getAll(Class<T> interfaceClass) throws ClassCastException
{
return getInternalLogic(interfaceClass, false);
}
@SuppressWarnings("unchecked")
@Override
public <T extends BindableType> T get(Class<T> interfaceClass, boolean allowIncompleteDependencies) throws ClassCastException
{
return (T) getInternalLogic(interfaceClass, allowIncompleteDependencies).get(0);
}
/**
* Always returns a list of size 1 or greater,
* if no dependencies have been bound the list will contain null.
*/
@SuppressWarnings("unchecked")
private <T extends BindableType> ArrayList<T> getInternalLogic(Class<T> interfaceClass, boolean allowIncompleteDependencies) throws ClassCastException
{
ArrayList<BindableType> dependencyList = dependencies.get(interfaceClass);
if (dependencyList != null && dependencyList.size() != 0)
{
// check if each dependencies' delayed setup has been completed
for (IBindable dependency : dependencyList)
{
if (!dependency.getDelayedSetupComplete() && !allowIncompleteDependencies)
{
// a warning can be used here instead if desired
//this.logger.warn("Got dependency of type [" + interfaceClass.getSimpleName() + "], but the dependency's delayed setup hasn't been run!");
throw new IllegalStateException("Got dependency of type [" + interfaceClass.getSimpleName() + "], but the dependency's delayed setup hasn't been run!");
}
}
return (ArrayList<T>) dependencyList;
}
// return an empty list to prevent null pointers
ArrayList<T> emptyList = new ArrayList<T>();
emptyList.add(null);
return emptyList;
}
/** Removes all bound dependencies. */
@Override
public void clear()
{
this.dependencies.clear();
}
/** Runs delayed setup for any dependencies that require it. */
@Override
public void runDelayedSetup()
{
for (Class<? extends BindableType> interfaceKey : dependencies.keySet())
{
IBindable concreteObject = get(interfaceKey, true);
if (!concreteObject.getDelayedSetupComplete())
{
concreteObject.finishDelayedSetup();
}
}
}
}
@@ -0,0 +1,121 @@
/*
* This file is part of the Distant Horizons mod (formerly the LOD Mod),
* licensed under the GNU LGPL v3 License.
*
* Copyright (C) 2020-2022 James Seibel
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.seibel.lod.core.DependencyInjection;
import com.seibel.lod.api.methods.events.interfaces.IDhApiEvent;
import com.seibel.lod.core.interfaces.dependencyInjection.IBindable;
import com.seibel.lod.core.interfaces.dependencyInjection.IDhApiEventInjector;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import java.util.ArrayList;
/**
* This class takes care of dependency injection for API events.
*
* @author James Seibel
* @version 2022-9-13
*/
public class DhApiEventInjector extends DependencyInjector<IDhApiEvent> implements IDhApiEventInjector // Note to self: Don't try adding a generic type to IDhApiEvent, the consturctor won't accept it
{
private static final Logger LOGGER = LogManager.getLogger(DhApiEventInjector.class.getSimpleName());
public static final DhApiEventInjector INSTANCE = new DhApiEventInjector();
public DhApiEventInjector()
{
super(IDhApiEvent.class, true);
}
@Override
public boolean unbind(Class<? extends IDhApiEvent> dependencyInterface, Class<? extends IDhApiEvent> dependencyClassToRemove) throws IllegalArgumentException
{
// make sure the given dependency implements the necessary interfaces
boolean implementsInterface = checkIfClassImplements(dependencyClassToRemove, dependencyInterface)
|| checkIfClassExtends(dependencyClassToRemove, dependencyInterface);
boolean implementsBindable = checkIfClassImplements(dependencyClassToRemove, this.bindableInterface);
// display any errors
if (!implementsInterface)
{
throw new IllegalArgumentException("The event handler [" + dependencyClassToRemove.getSimpleName() + "] doesn't implement or extend: [" + dependencyInterface.getSimpleName() + "].");
}
if (!implementsBindable)
{
throw new IllegalArgumentException("The event handler [" + dependencyClassToRemove.getSimpleName() + "] doesn't implement the interface: [" + IBindable.class.getSimpleName() + "].");
}
// actually remove the dependency
if (this.dependencies.containsKey(dependencyInterface))
{
ArrayList<IDhApiEvent> dependencyList = this.dependencies.get(dependencyInterface);
int indexToRemove = -1;
for(int i = 0; i < dependencyList.size(); i++)
{
IBindable dependency = dependencyList.get(i);
if (dependency.getClass().equals(dependencyClassToRemove))
{
indexToRemove = i;
break;
}
}
if (indexToRemove != -1)
{
return dependencyList.remove(indexToRemove) != null;
}
}
// no item was removed
return false;
}
@Override
public <T, U extends IDhApiEvent<T>> boolean fireAllEvents(Class<U> dependencyInterface, T eventParameterObject)
{
boolean cancelEvent = false;
ArrayList<U> eventList = this.getAll(dependencyInterface);
for (IDhApiEvent<T> event : eventList)
{
if (event != null)
{
try
{
// fire each event and record if any of them
// request to cancel the event.
cancelEvent |= event.fireEvent(eventParameterObject);
}
catch (Exception e)
{
// TODO log the failed event handler
LOGGER.error("Exception thrown by event handler :" + e.getMessage(), e);
}
}
}
return cancelEvent;
}
}
@@ -0,0 +1,132 @@
/*
* This file is part of the Distant Horizons mod (formerly the LOD Mod),
* licensed under the GNU LGPL v3 License.
*
* Copyright (C) 2020-2022 James Seibel
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.seibel.lod.core.DependencyInjection;
import com.seibel.lod.api.items.interfaces.override.IDhApiOverrideable;
import com.seibel.lod.core.interfaces.dependencyInjection.IOverrideInjector;
import com.seibel.lod.core.util.StringUtil;
import java.util.HashMap;
/**
* This class takes care of dependency injection for overridable objects. <Br>
* This is done so other mods can override our methods to improve features down the line.
*
* @author James Seibel
* @version 2022-9-8
*/
public class OverrideInjector implements IOverrideInjector<IDhApiOverrideable>
{
public static final OverrideInjector INSTANCE = new OverrideInjector();
private final HashMap<Class<? extends IDhApiOverrideable>, OverridePriorityListContainer> overrideContainerByInterface = new HashMap<>();
/**
* This is used to determine if an override is part of Distant Horizons'
* Core or not.
* This probably isn't the best way of going about this, but it works for now.
*/
private final String corePackagePath;
public OverrideInjector()
{
String thisPackageName = this.getClass().getPackage().getName();
int secondPackageEndingIndex = StringUtil.nthIndexOf(thisPackageName, ".", 3);
this.corePackagePath = thisPackageName.substring(0, secondPackageEndingIndex); // this should be "com.seibel.lod"
}
public OverrideInjector(String newCorePackagePath) { this.corePackagePath = newCorePackagePath; }
@Override
public void bind(Class<? extends IDhApiOverrideable> dependencyInterface, IDhApiOverrideable dependencyImplementation) throws IllegalStateException, IllegalArgumentException
{
// make sure a override container exists
OverridePriorityListContainer overrideContainer = this.overrideContainerByInterface.get(dependencyInterface);
if (overrideContainer == null)
{
overrideContainer = new OverridePriorityListContainer();
this.overrideContainerByInterface.put(dependencyInterface, overrideContainer);
}
// validate the new override //
// check if this override is a core override
if (dependencyImplementation.getPriority() == CORE_PRIORITY)
{
// this claims to be a core override, is that true?
String packageName = dependencyImplementation.getClass().getPackage().getName();
if (!packageName.startsWith(this.corePackagePath))
{
throw new IllegalArgumentException("Only Distant Horizons internal objects can use the Override Priority [" + CORE_PRIORITY + "]. Please use a higher number.");
}
}
// make sure the override has a valid priority
else if (dependencyImplementation.getPriority() < MIN_NON_CORE_OVERRIDE_PRIORITY)
{
throw new IllegalArgumentException("Invalid priority value [" + dependencyImplementation.getPriority() + "], override priorities must be [" + MIN_NON_CORE_OVERRIDE_PRIORITY + "] or greater.");
}
// check if an override already exists with this priority
IDhApiOverrideable existingOverride = overrideContainer.getOverrideWithPriority(dependencyImplementation.getPriority());
if (existingOverride != null)
{
throw new IllegalStateException("An override already exists with the priority [" + dependencyImplementation.getPriority() + "].");
}
// bind the override
overrideContainer.addOverride(dependencyImplementation);
}
@Override
@SuppressWarnings("unchecked")
public <T extends IDhApiOverrideable> T get(Class<T> interfaceClass) throws ClassCastException
{
OverridePriorityListContainer overrideContainer = this.overrideContainerByInterface.get(interfaceClass);
return overrideContainer != null ? (T) overrideContainer.getOverrideWithHighestPriority() : null;
}
@Override
@SuppressWarnings("unchecked")
public <T extends IDhApiOverrideable> T get(Class<T> interfaceClass, int priority) throws ClassCastException
{
OverridePriorityListContainer overrideContainer = this.overrideContainerByInterface.get(interfaceClass);
return overrideContainer != null ? (T) overrideContainer.getOverrideWithPriority(priority) : null;
}
@Override
public void clear() { this.overrideContainerByInterface.clear(); }
}
@@ -0,0 +1,116 @@
package com.seibel.lod.core.DependencyInjection;
import com.seibel.lod.api.items.interfaces.override.IDhApiOverrideable;
import com.seibel.lod.core.interfaces.dependencyInjection.IBindable;
import java.util.ArrayList;
/**
* Contains a list of overrides and their priorities.
*
* @author James Seibel
* @version 2022-9-5
*/
public class OverridePriorityListContainer implements IBindable
{
/** Sorted highest priority to lowest */
private final ArrayList<OverridePriorityPair> overridePairList = new ArrayList<>();
/** Doesn't do any validation */
public void addOverride(IDhApiOverrideable override)
{
OverridePriorityPair priorityPair = new OverridePriorityPair(override, override.getPriority());
this.overridePairList.add(priorityPair);
sortList();
}
/** @return true if the override was removed from the list, false otherwise. */
public boolean removeOverride(IDhApiOverrideable override)
{
if (this.overridePairList.contains(override))
{
this.overridePairList.remove(override);
sortList();
return true;
}
else
{
return false;
}
}
// getters //
public IDhApiOverrideable getOverrideWithLowestPriority()
{
if (this.overridePairList.size() == 0)
{
return null;
}
else
{
// last item should have the highest priority
return this.overridePairList.get(this.overridePairList.size() - 1).override;
}
}
public IDhApiOverrideable getOverrideWithHighestPriority()
{
if (this.overridePairList.size() != 0)
{
return this.overridePairList.get(0).override;
}
else
{
return null;
}
}
public IDhApiOverrideable getCoreOverride()
{
int lastIndex = this.overridePairList.size() - 1;
if (this.overridePairList.get(lastIndex) != null && this.overridePairList.get(lastIndex).priority == OverrideInjector.CORE_PRIORITY)
{
return this.overridePairList.get(lastIndex).override;
}
else
{
return null;
}
}
/** Returns null if no override with the given priority is found */
public IDhApiOverrideable getOverrideWithPriority(int priority)
{
for (OverridePriorityPair pair : this.overridePairList)
{
if (pair.priority == priority)
{
return pair.override;
}
}
return null;
}
// utils //
/** sort the list so the highest priority item is first in the list */
private void sortList() { this.overridePairList.sort((x,y) -> Integer.compare(y.priority, x.priority)); }
private class OverridePriorityPair
{
public final IDhApiOverrideable override;
public int priority;
public OverridePriorityPair(IDhApiOverrideable newOverride, int newPriority)
{
this.override = newOverride;
this.priority = newPriority;
}
}
}
@@ -0,0 +1,152 @@
/*
* This file is part of the Distant Horizons mod (formerly the LOD Mod),
* licensed under the GNU LGPL v3 License.
*
* Copyright (C) 2020-2022 James Seibel
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.seibel.lod.core.DependencyInjection;
import com.seibel.lod.api.items.interfaces.override.worldGenerator.IDhApiWorldGenerator;
import com.seibel.lod.api.items.interfaces.world.IDhApiLevelWrapper;
import com.seibel.lod.core.interfaces.dependencyInjection.IBindable;
import com.seibel.lod.core.util.StringUtil;
import java.util.HashMap;
/**
* This class takes care of dependency injection for world generators. <Br>
* This is done so other mods can override our world generator(s) to improve or replace them.
*
* @author James Seibel
* @version 2022-9-8
*/
public class WorldGeneratorInjector
{
public static final WorldGeneratorInjector INSTANCE = new WorldGeneratorInjector();
private final HashMap<IDhApiLevelWrapper, OverrideInjector> worldGeneratorByLevelWrapper = new HashMap<>();
/** World generators that aren't bound to a specific level and are used if no other world generators are bound. */
private final OverrideInjector backupUniversalWorldGenerators;
/**
* This is used to determine if an override is part of Distant Horizons'
* Core or not.
* This probably isn't the best way of going about this, but it works for now.
*/
private final String corePackagePath;
public WorldGeneratorInjector()
{
String thisPackageName = this.getClass().getPackage().getName();
int secondPackageEndingIndex = StringUtil.nthIndexOf(thisPackageName, ".", 3);
this.corePackagePath = thisPackageName.substring(0, secondPackageEndingIndex); // this should be "com.seibel.lod"
this.backupUniversalWorldGenerators = new OverrideInjector(this.corePackagePath);
}
/** This constructor should only be used for testing different corePackagePaths. */
public WorldGeneratorInjector(String newCorePackagePath)
{
this.corePackagePath = newCorePackagePath;
this.backupUniversalWorldGenerators = new OverrideInjector(this.corePackagePath);
}
/**
* Binds the backup world generator. <Br>
* See {@link DependencyInjector#bind(Class, IBindable) bind(Class, IBindable)} for full documentation.
*
* @throws IllegalArgumentException if a non-Distant Horizons world generator with the priority CORE is passed in
* @see DependencyInjector#bind(Class, IBindable)
*/
public void bind(IDhApiWorldGenerator worldGeneratorImplementation) throws IllegalStateException, IllegalArgumentException
{
bind(null, worldGeneratorImplementation);
}
/**
* Binds the world generator to the given level. <Br>
* See {@link DependencyInjector#bind(Class, IBindable) bind(Class, IBindable)} for full documentation.
*
* @throws IllegalArgumentException if a non-Distant Horizons world generator with the priority CORE is passed in
* @see DependencyInjector#bind(Class, IBindable)
*/
public void bind(IDhApiLevelWrapper levelForWorldGenerator, IDhApiWorldGenerator worldGeneratorImplementation) throws IllegalStateException, IllegalArgumentException
{
if (levelForWorldGenerator != null)
{
// bind this generator to a specific level
if (!worldGeneratorByLevelWrapper.containsKey(levelForWorldGenerator))
{
worldGeneratorByLevelWrapper.put(levelForWorldGenerator, new OverrideInjector(this.corePackagePath));
}
worldGeneratorByLevelWrapper.get(levelForWorldGenerator).bind(IDhApiWorldGenerator.class, worldGeneratorImplementation);
}
else
{
// a null level wrapper binds the generator to all levels
backupUniversalWorldGenerators.bind(IDhApiWorldGenerator.class, worldGeneratorImplementation);
}
}
/**
* Returns the backup world generator with the highest priority. <br>
* See {@link OverrideInjector#get(Class) get(Class)} for more documentation.
*
* @see OverrideInjector#get(Class)
*/
public IDhApiWorldGenerator get() throws ClassCastException
{
return backupUniversalWorldGenerators.get(IDhApiWorldGenerator.class);
}
/**
* Returns the bound world generator with the highest priority. <br>
* (Returns a backup world generator if no world generators have been bound for this specific level.) <br>
* See {@link OverrideInjector#get(Class) get(Class)} for more documentation.
*
* @see OverrideInjector#get(Class)
*/
public IDhApiWorldGenerator get(IDhApiLevelWrapper levelForWorldGenerator) throws ClassCastException
{
if (!worldGeneratorByLevelWrapper.containsKey(levelForWorldGenerator))
{
// no generator exists for this specific level.
// check for a backup universal world generator
return backupUniversalWorldGenerators.get(IDhApiWorldGenerator.class);
}
// use the existing world generator
return worldGeneratorByLevelWrapper.get(levelForWorldGenerator).get(IDhApiWorldGenerator.class);
}
/** Removes all bound world generators. */
public void clearBoundDependencies() // TODO this should be done when leaving the current world/server
{
this.worldGeneratorByLevelWrapper.clear();
this.backupUniversalWorldGenerators.clear();
}
}
@@ -19,8 +19,6 @@
package com.seibel.lod.core;
import java.util.Locale;
/**
* This file is similar to mcmod.info
* <br>
@@ -50,6 +48,5 @@ public final class ModInfo
public static final int API_MAJOR_VERSION = 0;
/** This version should be updated whenever new methods are added to the DH API */
public static final int API_MINOR_VERSION = 0;
}
@@ -17,7 +17,7 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.seibel.lod.core.dependencyInjection;
package com.seibel.lod.core.interfaces.dependencyInjection;
/**
* Necessary for all singletons that can be dependency injected.
@@ -1,4 +1,4 @@
package com.seibel.lod.core.dependencyInjection;
package com.seibel.lod.core.interfaces.dependencyInjection;
import java.util.ArrayList;
@@ -0,0 +1,51 @@
/*
* This file is part of the Distant Horizons mod (formerly the LOD Mod),
* licensed under the GNU LGPL v3 License.
*
* Copyright (C) 2020-2022 James Seibel
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.seibel.lod.core.interfaces.dependencyInjection;
import com.seibel.lod.api.methods.events.interfaces.IDhApiEvent;
/**
* This class takes care of dependency injection for API events.
*
* @author James Seibel
* @version 2022-9-13
*/
public interface IDhApiEventInjector extends IDependencyInjector<IDhApiEvent> // Note to self: Don't try adding a generic type to IDhApiEvent, the consturctor won't accept it
{
/**
* Unlinks the given event handler, preventing the handler from being called in the future.
*
* @throws IllegalArgumentException if the implementation object doesn't implement the interface
* @return true if the handler was unbound, false if the handler wasn't bound.
*/
public boolean unbind(Class<? extends IDhApiEvent> dependencyInterface, Class<? extends IDhApiEvent> dependencyClassToRemove) throws IllegalArgumentException;
/**
* Fires all bound events of the given type (does nothing if no events are bound).
*
* @param dependencyInterface event type
* @param eventParameterObject event parameter
* @return if any of the events returned that this event should be canceled.
* @param <T> the parameter type taken by the event handlers.
*/
public <T, U extends IDhApiEvent<T>> boolean fireAllEvents(Class<U> dependencyInterface, T eventParameterObject);
}
@@ -1,4 +1,4 @@
package com.seibel.lod.core.dependencyInjection;
package com.seibel.lod.core.interfaces.dependencyInjection;
import com.seibel.lod.api.items.interfaces.override.IDhApiOverrideable;
@@ -0,0 +1,42 @@
/*
* This file is part of the Distant Horizons mod (formerly the LOD Mod),
* licensed under the GNU LGPL v3 License.
*
* Copyright (C) 2020-2022 James Seibel
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package com.seibel.lod.core.util;
/**
* Miscellaneous string helper functions.
*
* @author James Seibel
* @version 2022-7-19
*/
public class StringUtil
{
/**
* Returns the n-th index of the given string. <br> <br>
*
* Original source: https://stackoverflow.com/questions/3976616/how-to-find-nth-occurrence-of-character-in-a-string
*/
public static int nthIndexOf(String str, String substr, int n)
{
int pos = str.indexOf(substr);
while (--n > 0 && pos != -1)
pos = str.indexOf(substr, pos + 1);
return pos;
}
}