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PrimeFaces Extensions Project for Maven.
/*
* Copyright (c) 2011-2024 PrimeFaces Extensions
*
* 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 NONINFRINGEMENT. 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.primefaces.extensions.util;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletRequest;
import org.primefaces.extensions.converter.JsonConverter;
import org.primefaces.extensions.converter.JsonExposeAwareConverter;
/**
* Builder for request parameters.
*
* @author Oleg Varaksin
* @since 1.1.0
*/
public class RequestParameterBuilder {
private StringBuilder buffer;
private final String originalUrl;
private final JsonConverter jsonConverter;
private String encoding;
private boolean added;
/**
* Creates a builder instance. This constructor is useful when we only use encode() and encodeJson() methods.
*/
public RequestParameterBuilder() {
this(null);
}
/**
* Creates a builder instance wihout URL or with the current request URL.
*
* @param useCurrentRequest boolean flag if the current request URL should be used or not
*/
public RequestParameterBuilder(final boolean useCurrentRequest) {
this(useCurrentRequest
? ((HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext()
.getRequest()).getRequestURL()
.toString()
: null);
}
/**
* Creates a builder instance by the given URL.
*
* @param url URL
*/
public RequestParameterBuilder(final String url) {
this(url, null);
}
/**
* Creates a builder instance by the given URL.
*
* @param url URL
* @param jsonConverter specific JsonConverter. It should extends {@link JsonConverter} from PrimeFaces Extensions. If null, the default implementation
* {@link JsonExposeAwareConverter} is used.
*/
public RequestParameterBuilder(final String url, final JsonConverter jsonConverter) {
buffer = new StringBuilder(url != null ? url : org.primefaces.util.Constants.EMPTY_STRING);
originalUrl = url != null ? url : org.primefaces.util.Constants.EMPTY_STRING;
this.jsonConverter = jsonConverter == null ? new JsonExposeAwareConverter(false) : jsonConverter;
encoding = FacesContext.getCurrentInstance().getExternalContext().getRequestCharacterEncoding();
if (encoding == null) {
encoding = "UTF-8";
}
}
/**
* Adds a request parameter to the URL without specifying a data type of the given parameter value. Parameter's value is converted to JSON notation when
* adding. Furthermore, it will be encoded according to the acquired encoding.
*
* @param name name of the request parameter
* @param value value of the request parameter
* @return RequestParameterBuilder updated this instance which can be reused
* @throws UnsupportedEncodingException DOCUMENT_ME
*/
public RequestParameterBuilder paramJson(final String name, final Object value)
throws UnsupportedEncodingException {
return paramJson(name, value, null);
}
/**
* Adds a request parameter to the URL with specifying a data type of the given parameter value. Data type is sometimes required, especially for Java
* generic types, because type information is erased at runtime and the conversion to JSON will not work properly. Parameter's value is converted to JSON
* notation when adding. Furthermore, it will be encoded according to the acquired encoding.
*
* @param name name of the request parameter
* @param value value of the request parameter
* @param type data type of the value object. Any primitive type, array, non generic or generic type is supported. Data type is sometimes required to
* convert a value to a JSON representation. All data types should be fully qualified. Examples: "boolean" "int" "long[]" "java.lang.String"
* "java.util.Date" "java.util.Collection<java.lang.Integer>" "java.util.Map<java.lang.String, com.durr.FooPair<java.lang.Integer,
* java.util.Date>>" "com.durr.FooNonGenericClass" "com.durr.FooGenericClass<java.lang.String, java.lang.Integer>"
* "com.durr.FooGenericClass<int[], com.durr.FooGenericClass<com.durr.FooNonGenericClass, java.lang.Boolean>>".
* @return RequestParameterBuilder updated this instance which can be reused
* @throws UnsupportedEncodingException DOCUMENT_ME
*/
public RequestParameterBuilder paramJson(final String name, final Object value, final String type)
throws UnsupportedEncodingException {
final String encodedJsonValue = encodeJson(value, type);
if (added || originalUrl.contains("?")) {
buffer.append("&");
}
else {
buffer.append("?");
}
buffer.append(name);
buffer.append("=");
buffer.append(encodedJsonValue);
// set a flag that at least one request parameter was added
added = true;
return this;
}
/**
* Adds a request parameter to the URL. This is a convenient method for primitive, plain data types. Parameter's value will not be converted to JSON
* notation when adding. It will be only encoded according to the acquired encoding. Note: null values will not be added.
*
* @param name name of the request parameter
* @param value value of the request parameter
* @return RequestParameterBuilder updated this instance which can be reused
* @throws UnsupportedEncodingException DOCUMENT_ME
*/
public RequestParameterBuilder param(final String name, final Object value) throws UnsupportedEncodingException {
final String encodedValue = encode(value);
if (encodedValue == null) {
return this;
}
if (added || originalUrl.contains("?")) {
buffer.append("&");
}
else {
buffer.append("?");
}
buffer.append(name);
buffer.append("=");
buffer.append(encodedValue);
// set a flag that at least one request parameter was added
added = true;
return this;
}
/**
* Encodes given value with a proper encoding. This is a convenient method for primitive, plain data types. Value will not be converted to JSON. Note: Value
* can be null.
*
* @param value value to be encoded
* @return String encoded value
* @throws UnsupportedEncodingException DOCUMENT_ME
*/
public String encode(final Object value) throws UnsupportedEncodingException {
if (value == null) {
return null;
}
return URLEncoder.encode(value.toString(), encoding);
}
/**
* Convertes give value to JSON and encodes the converted value with a proper encoding. Data type is sometimes required, especially for Java generic types,
* because type information is erased at runtime and the conversion to JSON will not work properly.
*
* @param value value to be converted and encoded
* @param type data type of the value object. Any primitive type, array, non generic or generic type is supported. Data type is sometimes required to
* convert a value to a JSON representation. All data types should be fully qualified. Examples: "boolean" "int" "long[]" "java.lang.String"
* "java.util.Date" "java.util.Collection<java.lang.Integer>" "java.util.Map<java.lang.String, com.durr.FooPair<java.lang.Integer,
* java.util.Date>>" "com.durr.FooNonGenericClass" "com.durr.FooGenericClass<java.lang.String, java.lang.Integer>"
* "com.durr.FooGenericClass<int[], com.durr.FooGenericClass<com.durr.FooNonGenericClass, java.lang.Boolean>>".
* @return String converted and encoded value
* @throws UnsupportedEncodingException DOCUMENT_ME
*/
public String encodeJson(final Object value, final String type) throws UnsupportedEncodingException {
jsonConverter.setType(type);
final String jsonValue;
if (value == null) {
jsonValue = "null";
}
else {
jsonValue = jsonConverter.getAsString(null, null, value);
}
return URLEncoder.encode(jsonValue, encoding);
}
/**
* Convertes give value to JSON without to know the data type and encodes the converted value with a proper encoding.
*
* @param value value to be converted and encoded
* @return String converted and encoded value
* @throws UnsupportedEncodingException DOCUMENT_ME
*/
public String encodeJson(final Object value) throws UnsupportedEncodingException {
return encodeJson(value, null);
}
/**
* Builds the end result.
*
* @return String end result
*/
public String build() {
return buffer.toString();
}
/**
* Resets the internal state in order to be reused.
*
* @return RequestParameterBuilder reseted builder
*/
public RequestParameterBuilder reset() {
buffer = new StringBuilder(originalUrl);
jsonConverter.setType(null);
added = false;
return this;
}
}
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