com.seanchenxi.gwt.wordpress.json.core.JRequestURLImpl.java Source code

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/*******************************************************************************
 * Copyright 2012 Xi CHEN
 *
 * 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 com.seanchenxi.gwt.wordpress.json.core;

import java.util.Date;
import java.util.HashMap;

import com.google.gwt.http.client.URL;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.seanchenxi.gwt.wordpress.json.api.JRequestURL;

public class JRequestURLImpl implements JRequestURL {

    protected final static DateTimeFormat DATE_FORMAT = DateTimeFormat.getFormat("yyy-MM-d");
    protected final static String START = "?";
    protected final static String AND = "&";
    protected final static String SLASH = "/";
    protected final static String EQUAL = "=";
    protected final static String AT = "%40";

    private JMethod method;
    private HashMap<String, Object> params;

    private boolean encode;
    private String request;

    public JRequestURLImpl(JMethod submitcomment) {
        if (submitcomment == null)
            throw new NullPointerException();
        this.method = submitcomment;
        this.params = new HashMap<String, Object>();
        this.request = null;
    }

    @Override
    public JRequestURLImpl setParameter(String name, Object value) {
        if (name == null || name.trim().isEmpty() || value == null)
            throw new NullPointerException();
        this.params.put(name.trim(), value);
        if (request != null)
            this.request = null;
        return this;
    }

    public JRequestURLImpl setParameter(JParameter param, Object value) {
        if (param == null || value == null)
            throw new NullPointerException();
        this.params.put(param.toString(), value);
        if (request != null)
            this.request = null;
        return this;
    }

    @Override
    public void setEncode(boolean encode) {
        this.encode = encode;
    }

    @Override
    public boolean isEncode() {
        return encode;
    }

    @Override
    public String getMethodName() {
        return method.toString();
    }

    @Override
    public String setPrefix(String urlPrefix) {
        if (request == null) {
            StringBuilder sb = new StringBuilder(urlPrefix);
            sb.append(SLASH).append(method).append(SLASH);
            if (!params.isEmpty()) {
                sb.append(START);
                for (String name : params.keySet()) {
                    sb.append(name).append(EQUAL).append(convert(params.get(name)));
                    sb.append(AND);
                }
                sb.deleteCharAt(sb.lastIndexOf(AND));
            }
            request = sb.toString();
            if (encode) {
                request = URL.encode(request);
            }
        }
        return request;
    }

    @Override
    public String toString() {
        return request;
    }

    private String convert(Object object) {
        if (object instanceof Date) {
            return DATE_FORMAT.format((Date) object);
        }
        return String.valueOf(object);
    }

}