core/src/main/java/com/opensymphony/xwork2/config/entities/ResultTypeConfig.java

/*
 * 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 com.opensymphony.xwork2.config.entities;

import com.opensymphony.xwork2.util.location.Located;
import com.opensymphony.xwork2.util.location.Location;

import java.io.Serializable;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;


/**
 * Configuration class for result types.
 *
 * <p>
 * In the xml configuration file this is defined as the <code>result-type</code> tag.
 * </p>
 *
 * @author Mike
 * @author Rainer Hermanns
 * @author Neo
 */
public class ResultTypeConfig extends Located implements Serializable {

    protected String className;
    protected String name;
    protected String defaultResultParam;
    protected Map<String,String> params;

    protected ResultTypeConfig(String name, String className) {
        this.name = name;
        this.className = className;
        params = new LinkedHashMap<>();
    }

    protected ResultTypeConfig(ResultTypeConfig orig) {
        this.name = orig.name;
        this.className = orig.className;
        this.defaultResultParam = orig.defaultResultParam;
        this.params = new LinkedHashMap<>(orig.params);
        this.location = orig.location;
    }

    public String getDefaultResultParam() {
        return this.defaultResultParam;
    }

    public String getClassName() {
        return className;
    }

    public String getName() {
        return name;
    }

    public Map<String,String> getParams() {
        return Collections.unmodifiableMap(this.params);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        final ResultTypeConfig that = (ResultTypeConfig) o;

        if (className != null ? !className.equals(that.className) : that.className != null) return false;
        if (name != null ? !name.equals(that.name) : that.name != null) return false;
        if (params != null ? !params.equals(that.params) : that.params != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result;
        result = (className != null ? className.hashCode() : 0);
        result = 29 * result + (name != null ? name.hashCode() : 0);
        result = 29 * result + (params != null ? params.hashCode() : 0);
        return result;
    }

    @Override
    public String toString() {
        return "ResultTypeConfig: [" + name + "] => [" + className + "] " +
                "with defaultParam [" + defaultResultParam + "] with params " + params;
    }

    /**
     * The builder for this object.  An instance of this object is the only way to construct a new instance.  The
     * purpose is to enforce the immutability of the object.  The methods are structured in a way to support chaining.
     * After setting any values you need, call the {@link #build()} method to create the object.
     */
    public static final class Builder {
        protected ResultTypeConfig target;

        public Builder(String name, String className) {
            target = new ResultTypeConfig(name, className);
        }

        public Builder(ResultTypeConfig orig) {
            target = new ResultTypeConfig(orig);
        }

        public Builder name(String name) {
            target.name = name;
            return this;
        }

        public Builder className(String name) {
            target.className = name;
            return this;
        }

         public Builder addParam(String name, String value) {
            target.params.put(name, value);
            return this;
        }

        public Builder addParams(Map<String,String> params) {
            target.params.putAll(params);
            return this;
        }

        public Builder defaultResultParam(String defaultResultParam) {
            target.defaultResultParam = defaultResultParam;
            return this;
        }

        public Builder location(Location loc) {
            target.location = loc;
            return this;
        }

        public ResultTypeConfig build() {
            ResultTypeConfig result = target;
            target = new ResultTypeConfig(target);
            return result;
        }
    }
}