/**
* Copyright 2011-2017 Asakusa Framework Team.
*
* 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.asakusafw.dmdl.model;
import java.util.LinkedList;
import com.asakusafw.dmdl.Region;
/**
* Represents simple names.
* @since 0.2.0
*/
public class AstQualifiedName extends AbstractAstNode implements AstName {
private final Region region;
/**
* The qualifier of this name.
*/
public final AstName qualifier;
/**
* The simple name of this name in tail.
*/
public final AstSimpleName simpleName;
/**
* Creates a new instance.
* @param region the region of this node, or {@code null} if unknown
* @param qualifier the qualifier name of this
* @param simpleName the simple name of this
* @throws IllegalArgumentException if some parameters were {@code null}
*/
public AstQualifiedName(Region region, AstName qualifier, AstSimpleName simpleName) {
if (qualifier == null) {
throw new IllegalArgumentException("qualifier must not be null"); //$NON-NLS-1$
}
if (simpleName == null) {
throw new IllegalArgumentException("simpleName must not be null"); //$NON-NLS-1$
}
this.region = region;
this.qualifier = qualifier;
this.simpleName = simpleName;
}
@Override
public Region getRegion() {
return region;
}
@Override
public AstName getQualifier() {
return qualifier;
}
@Override
public AstSimpleName getSimpleName() {
return simpleName;
}
@Override
public <C, R> R accept(C context, Visitor<C, R> visitor) {
if (visitor == null) {
throw new IllegalArgumentException("visitor must not be null"); //$NON-NLS-1$
}
R result = visitor.visitQualifiedName(context, this);
return result;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + qualifier.hashCode();
result = prime * result + simpleName.hashCode();
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
AstQualifiedName other = (AstQualifiedName) obj;
if (!qualifier.equals(other.qualifier)) {
return false;
}
if (!simpleName.equals(other.simpleName)) {
return false;
}
return true;
}
@Override
public String toString() {
LinkedList<AstSimpleName> names = new LinkedList<>();
AstName current = this;
while (current.getQualifier() != null) {
names.addFirst(current.getSimpleName());
current = current.getQualifier();
}
assert current instanceof AstSimpleName;
StringBuilder buf = new StringBuilder();
buf.append(current.getSimpleName().identifier);
for (AstSimpleName segment : names) {
buf.append('.');
buf.append(segment.identifier);
}
return buf.toString();
}
}