/*
* Copyright 2012 - 2017 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
*
* 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 org.springframework.data.solr.core.query;
import java.util.Collections;
import org.springframework.util.Assert;
/**
* Implementation of {@code product(x,y,...)}
*
* @author Christoph Strobl
* @since 1.1
*/
public class ProductFunction extends AbstractFunction {
private static final String OPERATION = "product";
private ProductFunction(Object value) {
super(Collections.singletonList(value));
}
/**
* @param value
* @return
*/
public static Builder product(Number value) {
return new Builder(value);
}
/**
* @param field
* @return
*/
public static Builder product(Field field) {
Assert.notNull(field, "Field must not be 'null'");
return product(field.getName());
}
/**
* @param fieldname
* @return
*/
public static Builder product(String fieldname) {
return new Builder(fieldname);
}
/**
* @param function
* @return
*/
public static Builder product(Function function) {
return new Builder(function);
}
@Override
public String getOperation() {
return OPERATION;
}
public static class Builder {
private ProductFunction function;
/**
* @param fieldname
*/
public Builder(String fieldname) {
Assert.hasText(fieldname, "Fieldname must not be 'empty'.");
this.function = new ProductFunction(fieldname);
}
/**
* @param value
*/
public Builder(Number value) {
Assert.notNull(value, "Argument 'value' must not be 'null'.");
this.function = new ProductFunction(value);
}
/**
* @param function
*/
public Builder(Function function) {
Assert.notNull(function, "Argument 'function' must not be 'null'.");
this.function = new ProductFunction(function);
}
/**
* @param field must not be null
* @return
*/
public Builder times(Field field) {
Assert.notNull(field, "Argument 'field' must not be 'null'.");
return times(field.getName());
}
/**
* @param fieldname must not be null
* @return
*/
public Builder times(String fieldname) {
Assert.hasText(fieldname, "Fieldname must not be 'empty'.");
this.function.addArgument(fieldname);
return this;
}
/**
* @param value must not be null
* @return
*/
public Builder times(Number value) {
Assert.notNull(value, "Argument 'value' must not be 'null'.");
this.function.addArgument(value);
return this;
}
/**
* @param function must not be null
* @return
*/
public Builder times(Function function) {
Assert.notNull(function, "Argument 'function' must not be 'null'.");
this.function.addArgument(function);
return this;
}
public ProductFunction build() {
return this.function;
}
}
}