/**
* 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.List;
import com.asakusafw.dmdl.Region;
import com.asakusafw.utils.collections.Lists;
/**
* Represents a mapping function for each property.
* @since 0.2.0
*/
public class AstPropertyMapping extends AbstractAstNode {
private final Region region;
/**
* The description of the defining property, or {@code null} if is omitted.
*/
public final AstDescription description;
/**
* The attributes of the defining property.
*/
public final List<AstAttribute> attributes;
/**
* The property name from the source model.
*/
public final AstSimpleName source;
/**
* The target property name.
*/
public final AstSimpleName target;
/**
* Creates and returns a new instance.
* @param region the region of this node on the enclosing script, or {@code null} if unknown
* @param description the description of this property, or {@code null} if is omitted
* @param attributes the attributes of this property
* @param source the property name from the source model
* @param target the target property name
* @throws IllegalArgumentException if some parameters were {@code null}
*/
public AstPropertyMapping(
Region region,
AstDescription description,
List<AstAttribute> attributes,
AstSimpleName source,
AstSimpleName target) {
if (source == null) {
throw new IllegalArgumentException("source must not be null"); //$NON-NLS-1$
}
if (target == null) {
throw new IllegalArgumentException("target must not be null"); //$NON-NLS-1$
}
this.region = region;
this.description = description;
this.attributes = Lists.freeze(attributes);
this.source = source;
this.target = target;
}
@Override
public Region getRegion() {
return region;
}
@Override
public <C, R> R accept(C context, AstNode.Visitor<C, R> visitor) {
if (visitor == null) {
throw new IllegalArgumentException("visitor must not be null"); //$NON-NLS-1$
}
R result = visitor.visitPropertyMapping(context, this);
return result;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + source.hashCode();
result = prime * result + target.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;
}
AstPropertyMapping other = (AstPropertyMapping) obj;
if (!source.equals(other.source)) {
return false;
}
if (!target.equals(other.target)) {
return false;
}
return true;
}
}