/**
* 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 com.asakusafw.dmdl.Region;
/**
* Represents a term of join model.
* @since 0.2.0
*/
public class AstSummarize extends AbstractAstNode implements AstTerm<AstSummarize> {
private final Region region;
/**
* The reference to the summarize target model.
*/
public final AstModelReference reference;
/**
* The folding function how to convert summarize target to the result model.
*/
public final AstModelFolding folding;
/**
* The grouping properties for aggregation.
* <p>
* This can be {@code null} if use total grouping.
* </p>
*/
public final AstGrouping grouping;
/**
* Creates and returns a new instance.
* @param region the region of this node on the enclosing script, or {@code null} if unknown
* @param reference the reference to the summarize target model
* @param folding the folding function
* @param grouping the grouping properties, or {@code null} on total grouping
* @throws IllegalArgumentException if some parameters were {@code null}
*/
public AstSummarize(
Region region,
AstModelReference reference,
AstModelFolding folding,
AstGrouping grouping) {
if (reference == null) {
throw new IllegalArgumentException("reference must not be null"); //$NON-NLS-1$
}
if (folding == null) {
throw new IllegalArgumentException("folding must not be null"); //$NON-NLS-1$
}
this.region = region;
this.reference = reference;
this.folding = folding;
this.grouping = grouping;
}
@Override
public Region getRegion() {
return region;
}
@Override
public AstSummarize getUnit() {
return this;
}
@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.visitSummarize(context, this);
return result;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + reference.hashCode();
result = prime * result + folding.hashCode();
result = prime * result + ((grouping == null) ? 0 : grouping.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;
}
AstSummarize other = (AstSummarize) obj;
if (!reference.equals(other.reference)) {
return false;
}
if (!folding.equals(other.folding)) {
return false;
}
if (grouping == null) {
if (other.grouping != null) {
return false;
}
} else if (!grouping.equals(other.grouping)) {
return false;
}
return true;
}
}