/*
* Copyright 2014 Goldman Sachs.
*
* 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.
*/
package com.gs.collections.impl.block.factory;
import java.io.IOException;
import java.io.PrintStream;
import com.gs.collections.api.block.predicate.Predicate;
import com.gs.collections.api.block.procedure.Procedure;
import com.gs.collections.api.block.procedure.Procedure2;
import com.gs.collections.api.block.procedure.primitive.ObjectIntProcedure;
import com.gs.collections.impl.block.procedure.CaseProcedure;
import com.gs.collections.impl.block.procedure.IfProcedure;
import com.gs.collections.impl.block.procedure.checked.CheckedProcedure;
import com.gs.collections.impl.block.procedure.checked.ThrowingProcedure;
/**
* Factory class for commonly used procedures.
*/
public final class Procedures
{
private Procedures()
{
throw new AssertionError("Suppress default constructor for noninstantiability");
}
/**
* Allows a Java 8 lambda and method to be used in a forEach method without requiring a cast.
*/
public static <T> Procedure<T> cast(Procedure<T> procedure)
{
return procedure;
}
public static <T> Procedure<T> println(PrintStream stream)
{
return new PrintlnProcedure<T>(stream);
}
public static <T> Procedure<T> append(Appendable appendable)
{
return new AppendProcedure<T>(appendable);
}
public static <T> Procedure<T> throwing(ThrowingProcedure<T> throwingProcedure)
{
return new ThrowingProcedureAdapter<T>(throwingProcedure);
}
/**
* @deprecated since 1.2 - Inlineable
*/
@Deprecated
public static <T> Procedure<T> fromProcedureWithInt(ObjectIntProcedure<? super T> objectIntProcedure)
{
return Procedures.fromObjectIntProcedure(objectIntProcedure);
}
public static <T> Procedure<T> fromObjectIntProcedure(ObjectIntProcedure<? super T> objectIntProcedure)
{
return new ObjectIntProcedureAdapter<T>(objectIntProcedure);
}
public static <T> Procedure<T> ifTrue(Predicate<? super T> predicate, Procedure<? super T> block)
{
return new IfProcedure<T>(predicate, block);
}
public static <T> Procedure<T> ifElse(
Predicate<? super T> predicate,
Procedure<? super T> trueProcedure,
Procedure<? super T> falseProcedure)
{
return new IfProcedure<T>(predicate, trueProcedure, falseProcedure);
}
public static <T> CaseProcedure<T> caseDefault(Procedure<? super T> defaultProcedure)
{
return new CaseProcedure<T>(defaultProcedure);
}
public static <T> CaseProcedure<T> caseDefault(
Procedure<? super T> defaultProcedure,
Predicate<? super T> predicate,
Procedure<? super T> procedure)
{
return Procedures.caseDefault(defaultProcedure).addCase(predicate, procedure);
}
public static <T> Procedure<T> synchronizedEach(Procedure<T> procedure)
{
return new Procedures.SynchronizedProcedure<T>(procedure);
}
public static <T, P> Procedure<T> bind(Procedure2<? super T, ? super P> procedure, P parameter)
{
return new BindProcedure<T, P>(procedure, parameter);
}
private static final class PrintlnProcedure<T> implements Procedure<T>
{
private static final long serialVersionUID = 1L;
private final PrintStream stream;
private PrintlnProcedure(PrintStream stream)
{
this.stream = stream;
}
public void value(T each)
{
this.stream.println(each);
}
}
private static final class AppendProcedure<T> implements Procedure<T>
{
private static final long serialVersionUID = 1L;
private final Appendable appendable;
private AppendProcedure(Appendable appendable)
{
this.appendable = appendable;
}
public void value(T each)
{
try
{
this.appendable.append(String.valueOf(each));
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
@Override
public String toString()
{
return this.appendable.toString();
}
}
private static final class ObjectIntProcedureAdapter<T> implements Procedure<T>
{
private static final long serialVersionUID = 2L;
private int count;
private final ObjectIntProcedure<? super T> objectIntProcedure;
private ObjectIntProcedureAdapter(ObjectIntProcedure<? super T> objectIntProcedure)
{
this.objectIntProcedure = objectIntProcedure;
}
public void value(T each)
{
this.objectIntProcedure.value(each, this.count);
this.count++;
}
}
public static final class SynchronizedProcedure<T> implements Procedure<T>
{
private static final long serialVersionUID = 1L;
private final Procedure<T> procedure;
private SynchronizedProcedure(Procedure<T> procedure)
{
this.procedure = procedure;
}
public void value(T each)
{
if (each == null)
{
this.procedure.value(null);
}
else
{
synchronized (each)
{
this.procedure.value(each);
}
}
}
}
private static final class BindProcedure<T, P> implements Procedure<T>
{
private static final long serialVersionUID = 1L;
private final Procedure2<? super T, ? super P> procedure;
private final P parameter;
private BindProcedure(Procedure2<? super T, ? super P> procedure, P parameter)
{
this.procedure = procedure;
this.parameter = parameter;
}
public void value(T each)
{
this.procedure.value(each, this.parameter);
}
}
private static final class ThrowingProcedureAdapter<T> extends CheckedProcedure<T>
{
private static final long serialVersionUID = 1L;
private final ThrowingProcedure<T> throwingProcedure;
private ThrowingProcedureAdapter(ThrowingProcedure<T> throwingProcedure)
{
this.throwingProcedure = throwingProcedure;
}
public void safeValue(T object) throws Exception
{
this.throwingProcedure.safeValue(object);
}
}
}