/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.jooby.internal.parser;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.inject.Inject;
import org.jooby.MediaType;
import org.jooby.Mutant;
import org.jooby.Parser;
import org.jooby.Parser.BodyReference;
import org.jooby.Parser.Builder;
import org.jooby.Parser.Callback;
import org.jooby.Parser.ParamReference;
import org.jooby.Status;
import org.jooby.Upload;
import org.jooby.internal.StatusCodeProvider;
import org.jooby.internal.StrParamReferenceImpl;
import org.jooby.internal.UploadParamReferenceImpl;
import com.google.common.collect.ImmutableList;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.TypeLiteral;
public class ParserExecutor {
public static final Object NO_PARSER = new Object();
private List<Parser> parsers;
private Injector injector;
private StatusCodeProvider sc;
@Inject
public ParserExecutor(final Injector injector, final Set<Parser> parsers,
final StatusCodeProvider sc) {
this.injector = injector;
this.parsers = ImmutableList.copyOf(parsers);
this.sc = sc;
}
public Status statusCode(final Throwable cause) {
return sc.apply(cause);
}
public <T> T convert(final TypeLiteral<?> type, final Object data) throws Throwable {
return convert(type, MediaType.plain, data);
}
@SuppressWarnings("unchecked")
public <T> T convert(final TypeLiteral<?> type, final MediaType contentType, final Object data)
throws Throwable {
Object result = ctx(injector, contentType, type, parsers, data).next(type, data);
return (T) result;
}
private static Parser.Context ctx(final Injector injector,
final MediaType contentType, final TypeLiteral<?> seedType, final List<Parser> parsers,
final Object seed) {
return new Parser.Context() {
int cursor = 0;
TypeLiteral<?> type = seedType;
ParserBuilder builder = new ParserBuilder(this, type, seed);
@Override
public MediaType type() {
return contentType;
}
@Override
public Builder body(final Callback<Parser.BodyReference> callback) {
return builder.body(callback);
}
@Override
public Builder ifbody(final Callback<BodyReference> callback) {
return builder.ifbody(callback);
}
@Override
public Builder upload(final Callback<Parser.ParamReference<Upload>> callback) {
return builder.upload(callback);
}
@Override
public Builder ifupload(final Callback<ParamReference<Upload>> callback) {
return builder.ifupload(callback);
}
@Override
public Builder param(final Callback<ParamReference<String>> callback) {
return builder.param(callback);
}
@Override
public Builder ifparam(final Callback<ParamReference<String>> callback) {
return builder.ifparam(callback);
}
@Override
public Builder params(final Callback<Map<String, Mutant>> callback) {
return builder.params(callback);
}
@Override
public Builder ifparams(final Callback<Map<String, Mutant>> callback) {
return builder.ifparams(callback);
}
@Override
public Object next() throws Throwable {
return next(builder.toType, builder.value);
}
@Override
public Object next(final TypeLiteral<?> type) throws Throwable {
return next(type, builder.value);
}
@Override
public Object next(final TypeLiteral<?> nexttype, final Object nextval)
throws Throwable {
if (cursor == parsers.size()) {
return NO_PARSER;
}
if (!type.equals(nexttype)) {
// reset cursor on type changes.
cursor = 0;
type = nexttype;
}
Parser next = parsers.get(cursor);
cursor += 1;
ParserBuilder current = builder;
builder = new ParserBuilder(this, nexttype, wrap(nextval, builder.value));
Object result = next.parse(nexttype, this);
if (result instanceof ParserBuilder) {
// call a parse
result = ((ParserBuilder) result).parse();
}
builder = current;
cursor -= 1;
return result;
}
@SuppressWarnings("rawtypes")
private Object wrap(final Object nextval, final Object value) {
if (nextval instanceof String) {
ParamReference<?> pref = (ParamReference) value;
return new StrParamReferenceImpl(pref.type(), pref.name(),
ImmutableList.of((String) nextval));
} else if (nextval instanceof Upload) {
ParamReference<?> pref = (ParamReference) value;
return new UploadParamReferenceImpl(pref.name(), ImmutableList.of((Upload) nextval));
}
return nextval;
}
@Override
public <T> T require(final Key<T> key) {
return injector.getInstance(key);
}
@Override
public <T> T require(final Class<T> type) {
return injector.getInstance(type);
}
@Override
public <T> T require(final TypeLiteral<T> type) {
return injector.getInstance(Key.get(type));
}
@Override
public String toString() {
return parsers.toString();
}
};
}
}