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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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.intellij.patterns;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.util.Key;
import com.intellij.util.InstanceofCheckerGenerator;
import com.intellij.util.PairProcessor;
import com.intellij.util.ProcessingContext;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.*;
/**
* @author peter
*/
public abstract class ObjectPattern<T, Self extends ObjectPattern<T, Self>> implements Cloneable, ElementPattern<T> {
private ElementPatternCondition<T> myCondition;
protected ObjectPattern(@NotNull final InitialPatternCondition<T> condition) {
myCondition = new ElementPatternCondition<T>(condition);
}
protected ObjectPattern(final Class<T> aClass) {
final Condition<Object> checker = InstanceofCheckerGenerator.getInstance().getInstanceofChecker(aClass);
myCondition = new ElementPatternCondition<T>(new InitialPatternCondition<T>(aClass) {
public boolean accepts(@Nullable final Object o, final ProcessingContext context) {
return checker.value(o);
}
});
}
public final boolean accepts(@Nullable Object t) {
return myCondition.accepts(t, new ProcessingContext());
}
public boolean accepts(@Nullable final Object o, final ProcessingContext context) {
return myCondition.accepts(o, context);
}
public final ElementPatternCondition getCondition() {
return myCondition;
}
public Self andNot(final ElementPattern pattern) {
ElementPattern<T> not = StandardPatterns.not(pattern);
return and(not);
}
public Self andOr(@NotNull ElementPattern... patterns) {
ElementPattern or = StandardPatterns.or(patterns);
return and(or);
}
public Self and(final ElementPattern pattern) {
return with(new PatternConditionPlus<T, T>("and", pattern) {
@Override
public boolean processValues(T t, ProcessingContext context, PairProcessor<T, ProcessingContext> processor) {
return processor.process(t, context);
}
});
}
public Self equalTo(@NotNull final T o) {
return with(new ValuePatternCondition<T>("equalTo") {
public boolean accepts(@NotNull final T t, final ProcessingContext context) {
return t.equals(o);
}
@Override
public Collection<T> getValues() {
return Collections.singletonList(o);
}
});
}
@NotNull
public Self oneOf(final T... values) {
final Collection<T> list;
if (values.length >= 11) {
list = new HashSet<T>(Arrays.asList(values));
}
else {
list = Arrays.asList(values);
}
return with(new ValuePatternCondition<T>("oneOf") {
@Override
public Collection<T> getValues() {
return list;
}
@Override
public boolean accepts(@NotNull T t, ProcessingContext context) {
return list.contains(t);
}
});
}
@NotNull
public Self oneOf(final Collection<T> set) {
return with(new ValuePatternCondition<T>("oneOf") {
@Override
public Collection<T> getValues() {
return set;
}
@Override
public boolean accepts(@NotNull T t, ProcessingContext context) {
return set.contains(t);
}
});
}
public Self isNull() {
return adapt(new ElementPatternCondition<T>(new InitialPatternCondition(Object.class) {
public boolean accepts(@Nullable final Object o, final ProcessingContext context) {
return o == null;
}
}));
}
public Self notNull() {
return adapt(new ElementPatternCondition<T>(new InitialPatternCondition(Object.class) {
public boolean accepts(@Nullable final Object o, final ProcessingContext context) {
return o != null;
}
}));
}
public Self save(final Key<? super T> key) {
return with(new PatternCondition<T>("save") {
public boolean accepts(@NotNull final T t, final ProcessingContext context) {
context.put((Key)key, t);
return true;
}
});
}
public Self save(@NonNls final String key) {
return with(new PatternCondition<T>("save") {
public boolean accepts(@NotNull final T t, final ProcessingContext context) {
context.put(key, t);
return true;
}
});
}
public Self with(final PatternCondition<? super T> pattern) {
final ElementPatternCondition<T> condition = myCondition.append(pattern);
return adapt(condition);
}
private Self adapt(final ElementPatternCondition<T> condition) {
try {
final ObjectPattern s = (ObjectPattern)clone();
s.myCondition = condition;
return (Self)s;
}
catch (CloneNotSupportedException e) {
throw new RuntimeException(e);
}
}
public Self without(final PatternCondition<? super T> pattern) {
return with(new PatternCondition<T>("without") {
public boolean accepts(@NotNull final T o, final ProcessingContext context) {
return !pattern.accepts(o, context);
}
});
}
public String toString() {
return myCondition.toString();
}
public static class Capture<T> extends ObjectPattern<T,Capture<T>> {
public Capture(final Class<T> aClass) {
super(aClass);
}
public Capture(@NotNull final InitialPatternCondition<T> condition) {
super(condition);
}
}
}
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