org.springframework.data.relational.core.sql.DefaultUpdate Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of spring-data-relational Show documentation
Show all versions of spring-data-relational Show documentation
Spring Data Relational support
/*
* Copyright 2019-2022 the original author or authors.
*
* 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
*
* https://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 org.springframework.data.relational.core.sql;
import java.util.ArrayList;
import java.util.List;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* Default {@link Update} implementation.
*
* @author Mark Paluch
* @since 1.1
*/
class DefaultUpdate implements Update {
private final Table table;
private final List assignments;
private final @Nullable Where where;
DefaultUpdate(Table table, List assignments, @Nullable Condition where) {
this.table = table;
this.assignments = new ArrayList<>(assignments);
this.where = where != null ? new Where(where) : null;
}
/*
* (non-Javadoc)
* @see org.springframework.data.relational.core.sql.Visitable#visit(org.springframework.data.relational.core.sql.Visitor)
*/
@Override
public void visit(Visitor visitor) {
Assert.notNull(visitor, "Visitor must not be null!");
visitor.enter(this);
this.table.visit(visitor);
this.assignments.forEach(it -> it.visit(visitor));
if (this.where != null) {
this.where.visit(visitor);
}
visitor.leave(this);
}
/*
* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("UPDATE ").append(table);
if (!assignments.isEmpty()) {
builder.append(" SET ").append(StringUtils.collectionToDelimitedString(this.assignments, ", "));
}
if (this.where != null) {
builder.append(" ").append(this.where);
}
return builder.toString();
}
}