src/main/java/org/takes/rq/form/RqFormSmart.java
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2024 Yegor Bugayenko
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.takes.rq.form;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.util.Iterator;
import lombok.EqualsAndHashCode;
import org.takes.HttpException;
import org.takes.Request;
import org.takes.rq.RqForm;
/**
* Smart decorator, with extra features.
*
* <p>The class is immutable and thread-safe.
*
* @since 0.33
*/
@EqualsAndHashCode
public final class RqFormSmart implements RqForm {
/**
* Original.
*/
private final RqForm origin;
/**
* Ctor.
* @param req Original request
* @since 1.4
*/
public RqFormSmart(final Request req) {
this(new RqFormBase(req));
}
/**
* Ctor.
* @param req Original request
*/
public RqFormSmart(final RqForm req) {
this.origin = req;
}
@Override
public Iterable<String> param(final CharSequence name)
throws IOException {
return this.origin.param(name);
}
@Override
public Iterable<String> names() throws IOException {
return this.origin.names();
}
@Override
public Iterable<String> head() throws IOException {
return this.origin.head();
}
@Override
public InputStream body() throws IOException {
return this.origin.body();
}
/**
* Get single param or throw HTTP exception.
* @param name Name of query param
* @return Value of it
* @throws IOException If fails
*/
public String single(final CharSequence name) throws IOException {
final Iterator<String> params = this.param(name).iterator();
if (!params.hasNext()) {
throw new HttpException(
HttpURLConnection.HTTP_BAD_REQUEST,
String.format(
"form param \"%s\" is mandatory", name
)
);
}
return params.next();
}
/**
* Get single param or default.
* @param name Name of query param
* @param def Default, if not found
* @return Value of it
* @throws IOException if something fails reading parameters
*/
public String single(final CharSequence name, final String def)
throws IOException {
final String value;
final Iterator<String> params = this.param(name).iterator();
if (params.hasNext()) {
value = params.next();
} else {
value = def;
}
return value;
}
}