common/src/main/java/org/apache/abdera2/common/templates/Operation.java - abdera - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  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.  For additional information regarding
  * copyright in this work, please see the NOTICE file in the top level
  * directory of this distribution.
  */
 package org.apache.abdera2.common.templates;

 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.Serializable;
 import java.nio.CharBuffer;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;

 import org.apache.abdera2.common.templates.Context;
 import org.apache.abdera2.common.templates.Expression;
 import org.apache.abdera2.common.templates.Operation;
 import org.apache.abdera2.common.templates.Expression.VarSpec;
 import org.apache.abdera2.common.text.CharUtils;
 import org.apache.abdera2.common.text.UrlEncoding;

 import com.ibm.icu.text.Normalizer2;

 @SuppressWarnings("unchecked")
 public abstract class Operation implements Serializable {

     private static final long serialVersionUID = -1734350302144527120L;
     public abstract String evaluate(Expression exp, Context context);

     private static Map<String, Operation> operations = getOperations();

     private static Map<String, Operation> getOperations() {
         Map<String, Operation> ops = new HashMap<String, Operation>();
         ops.put("", new DefaultOperation());
         ops.put("+", new ReservedExpansionOperation());
         ops.put("#", new FragmentExpansionOperation());
         ops.put(".", new DotExpansionOperation());
         ops.put("/", new PathExpansionOperation());
         ops.put(";", new PathParamExpansionOperation());
         ops.put("?", new FormExpansionOperation());
         ops.put("&", new QueryExpansionOperation());
         return ops;
     }

     /**
      * Register a new operation. The built in operations cannot be
      * overridden. Key should be a single character. This method
      * is not synchronized; it is not recommended that registrations
      * be allowed from multiple threads or while multiple threads are
      * expanding templates. Perform all registrations <i>before</i>
      * any template expansion occurs.
      */
     public static void register(String key, Operation operation) {
         if ("+#./;?&".contains(key))
           throw new IllegalArgumentException(
             "Cannot override reserved operators");
         operations.put(key, operation);
     }

     public static Operation get(String name) {
         if (name == null)
             name = "";
         Operation op = operations.get(name);
         if (op != null)
             return op;
         throw new UnsupportedOperationException(name);
     }

     protected static String eval(
         VarSpec varspec,
         Context context,
         boolean reserved,
         String explodeDelim,
         String explodePfx) {
         String name = varspec.getName();
         Object rep = context.resolve(name);
         String val = toString(
             rep,
             context,
             reserved,
             varspec.isExplode(),
             explodeDelim,
             explodePfx,
             varspec.getLength());
         return val;
     }

     private static CharSequence trim(CharSequence val, int len) {
       if (val != null && len > -1 && val.length() > len)
         val = val.subSequence(0,len);
       return val;
     }

     private static String normalize(CharSequence s) {
       return Normalizer2.getInstance(
         null,
         "nfc",
         Normalizer2.Mode.COMPOSE)
           .normalize(s);
     }

     private static String toString(
         Object val,
         Context context,
         boolean reserved,
         boolean explode,
         String explodeDelim,
         String explodePfx,
         int len) {
         if (val == null)
             return null;
         if (val.getClass().isArray()) {
             if (val instanceof byte[]) {
                 return UrlEncoding.encode((byte[])val);
             } else if (val instanceof char[]) {
                 String chars = (String)trim(new String((char[])val),len);
                 return !reserved ?
                   UrlEncoding.encode(
                     normalize(chars),
                     context.isIri()
                       ? CharUtils.Profile.IUNRESERVED :
                         CharUtils.Profile.UNRESERVED) :
                   UrlEncoding.encode(
                       normalize(chars),
                       context.isIri()
                         ? CharUtils.Profile.RESERVEDANDIUNRESERVED :
                           CharUtils.Profile.RESERVEDANDUNRESERVED);
             } else if (val instanceof short[]) {
                 StringBuilder buf = new StringBuilder();
                 short[] array = (short[])val;
                 for (short obj : array) {
                     if (buf.length() > 0)
                         buf.append(explode && explodeDelim != null ? explodeDelim : ",");
                     if (explode && explodePfx != null)
                       buf.append(explodePfx);
                     buf.append(trim(String.valueOf(obj),len));
                 }
                 return buf.toString();
             } else if (val instanceof int[]) {
                 StringBuilder buf = new StringBuilder();
                 int[] array = (int[])val;
                 for (int obj : array) {
                     if (buf.length() > 0)
                         buf.append(explode && explodeDelim != null ? explodeDelim : ",");
                     if (explode && explodePfx != null)
                       buf.append(explodePfx);
                     buf.append(trim(String.valueOf(obj),len));
                 }
                 return buf.toString();
             } else if (val instanceof long[]) {
                 StringBuilder buf = new StringBuilder();
                 long[] array = (long[])val;
                 for (long obj : array) {
                     if (buf.length() > 0)
                         buf.append(explode && explodeDelim != null ? explodeDelim : ",");
                     if (explode && explodePfx != null)
                       buf.append(explodePfx);
                     buf.append(trim(String.valueOf(obj),len));
                 }
                 return buf.toString();
             } else if (val instanceof double[]) {
                 StringBuilder buf = new StringBuilder();
                 double[] array = (double[])val;
                 for (double obj : array) {
                     if (buf.length() > 0)
                         buf.append(explode && explodeDelim != null ? explodeDelim : ",");
                     if (explode && explodePfx != null)
                       buf.append(explodePfx);
                     buf.append(trim(String.valueOf(obj),len));
                 }
                 return buf.toString();
             } else if (val instanceof float[]) {
                 StringBuilder buf = new StringBuilder();
                 float[] array = (float[])val;
                 for (float obj : array) {
                     if (buf.length() > 0)
                         buf.append(explode && explodeDelim != null ? explodeDelim : ",");
                     if (explode && explodePfx != null)
                       buf.append(explodePfx);
                     buf.append(trim(String.valueOf(obj),len));
                 }
                 return buf.toString();
             } else if (val instanceof boolean[]) {
                 StringBuilder buf = new StringBuilder();
                 boolean[] array = (boolean[])val;
                 for (boolean obj : array) {
                     if (buf.length() > 0)
                         buf.append(explode && explodeDelim != null ? explodeDelim : ",");
                     if (explode && explodePfx != null)
                       buf.append(explodePfx);
                     buf.append(trim(String.valueOf(obj),len));
                 }
                 return buf.toString();
             } else {
                 StringBuilder buf = new StringBuilder();
                 Object[] array = (Object[])val;
                 for (Object obj : array) {
                   if (buf.length() > 0)
                     buf.append(explode && explodeDelim != null ? explodeDelim : ",");
                   if (explode && explodePfx != null)
                     buf.append(explodePfx);
                   buf.append(toString(obj, context, reserved, false, null, null, len));
                 }
                 return buf.toString();
             }
         } else if (val instanceof InputStream) {
             try {
                 if (len > -1) {
                   byte[] buf = new byte[len];
                   int r = ((InputStream)val).read(buf);
                   byte[] dat = new byte[r];
                   System.arraycopy(buf, 0, dat, 0, r);
                   val = new ByteArrayInputStream(dat);
                 }
                 return UrlEncoding.encode((InputStream)val);
             } catch (IOException e) {
                 throw new RuntimeException(e);
             }
         } else if (val instanceof Readable) {
             try {
                 if (len > -1) {
                   CharBuffer buf = CharBuffer.allocate(len);
                   int r = ((Readable)val).read(buf);
                   buf.limit(r);
                   buf.position(0);
                   val = buf;
                 }
                 return !reserved ?
                     UrlEncoding.encode(
                       (Readable)val,
                       "UTF-8",
                       context.isIri() ?
                           CharUtils.Profile.IUNRESERVED :
                           CharUtils.Profile.UNRESERVED) :
                     UrlEncoding.encode(
                       (Readable)val,
                       "UTF-8",
                       context.isIri() ?
                           CharUtils.Profile.RESERVEDANDIUNRESERVED :
                           CharUtils.Profile.RESERVEDANDUNRESERVED);
             } catch (IOException e) {
                 throw new RuntimeException(e);
             }
         } else if (val instanceof CharSequence) {
             val = normalize((CharSequence)val);
             return encode((CharSequence)val, context.isIri(), reserved);
         } else if (val instanceof Byte) {
             return UrlEncoding.encode(((Byte)val).byteValue());
         } else if (val instanceof Iterable) {
             StringBuilder buf = new StringBuilder();
             Iterable<Object> i = (Iterable<Object>)val;
             for (Object obj : i) {
                 if (buf.length() > 0)
                   buf.append(explode && explodeDelim != null ? explodeDelim : ",");
                 if (explode && explodePfx != null)
                   buf.append(explodePfx);
                 buf.append(toString(obj, context, reserved, false, null, null, len));
             }
             return buf.toString();
         } else if (val instanceof Iterator) {
           StringBuilder buf = new StringBuilder();
           Iterator<Object> i = (Iterator<Object>)val;
           while (i.hasNext()) {
               Object obj = i.next();
               if (buf.length() > 0)
                 buf.append(explode && explodeDelim != null ? explodeDelim : ",");
               if (explode && explodePfx != null)
                 buf.append(explodePfx);
               buf.append(toString(obj, context, reserved, false, null, null, len));
           }
           return buf.toString();
         } else if (val instanceof Enumeration) {
           StringBuilder buf = new StringBuilder();
           Enumeration<Object> i = (Enumeration<Object>)val;
           while (i.hasMoreElements()) {
               Object obj = i.nextElement();
               if (buf.length() > 0)
                 buf.append(explode && explodeDelim != null ? explodeDelim : ",");
               if (explode && explodePfx != null)
                 buf.append(explodePfx);
               buf.append(toString(obj, context, reserved, false, null, null, len));
           }
           return buf.toString();
         } else if (val instanceof Map) {
             StringBuilder buf = new StringBuilder();
             Map<Object,Object> map = (Map<Object,Object>)val;
             for (Map.Entry<Object, Object> entry : map.entrySet()) {
               String _key = toString(entry.getKey(), context, reserved, false, null, null, len);
               String _val = toString(entry.getValue(), context, reserved, false, null, null, len);
               if (buf.length() > 0)
                 buf.append(explode && explodeDelim != null ? explodeDelim : ",");
               buf.append(_key)
                  .append(explode ? '=' : ',')
                  .append(_val);
             }
             return buf.toString();
         } else {
             if (val != null)
               val = normalize(val.toString());
             return encode(val != null ? val.toString() : null, context.isIri(), reserved);
         }
     }

     private static String encode(CharSequence val, boolean isiri, boolean reserved) {
         String v = normalize(val);
         return !reserved ?
           UrlEncoding.encode(v,
             isiri
               ? CharUtils.Profile.IUNRESERVED :
                 CharUtils.Profile.UNRESERVED) :
           UrlEncoding.encode(v,
               isiri
               ? CharUtils.Profile.RESERVEDANDIUNRESERVED :
                 CharUtils.Profile.RESERVEDANDUNRESERVED);
     }

     /**
      * Simple String Expansion ({VAR})
      */
     private static final class DefaultOperation extends Operation {
       private static final long serialVersionUID = 8676696520810767327L;
         public String evaluate(Expression exp, Context context) {
             StringBuilder buf = new StringBuilder();
             boolean first = true;
             for (VarSpec varspec : exp) {
               if (!first) buf.append(',');
               String val = eval(varspec, context, false, ",", null);
               buf.append(val != null ? val : "");
               first = false;
             }
             return buf.toString();
         }
     }

     /**
      * Reserved Expansion Operation ({+VAR})
      */
     private static final class ReservedExpansionOperation extends Operation {
         private static final long serialVersionUID = 1736980072492867748L;
         public String evaluate(Expression exp, Context context) {
             StringBuilder buf = new StringBuilder();
             boolean first = true;
             for (VarSpec varspec : exp) {
               if (!first) buf.append(',');
               String val = eval(varspec, context, true, ",", null);
               buf.append(val != null ? val : "");
               first = false;
             }
             return buf.toString();
         }
     }

     /**
      * Fragment Expansion Operation ({#VAR})
      */
     private static final class FragmentExpansionOperation extends Operation {
         private static final long serialVersionUID = -2207953454022197435L;
         public String evaluate(Expression exp, Context context) {
             StringBuilder buf = new StringBuilder();
             boolean first = true;
             for (VarSpec varspec : exp) {
               if (!first) buf.append(',');
               String val = eval(varspec, context, true, ",", null);
               if (first && val != null)
                 buf.append('#');
               buf.append(val != null ? val : "");
               first = false;
             }
             return buf.toString();
         }
     }

     /**
      * Dot Expansion Operation ({.VAR})
      */
     private static final class DotExpansionOperation extends Operation {
         private static final long serialVersionUID = -4357734926260213270L;
         public String evaluate(Expression exp, Context context) {
             StringBuilder buf = new StringBuilder();
             for (VarSpec varspec : exp) {
               String val = eval(varspec, context, true, ".", null);
               if (val != null)
                 buf.append('.');
               buf.append(val != null ? val : "");
             }
             return buf.toString();
         }
     }


     /**
      * Path Expansion Operation ({/VAR})
      */
     private static final class PathExpansionOperation extends Operation {
         private static final long serialVersionUID = 5578346646541533713L;
         public String evaluate(Expression exp, Context context) {
             StringBuilder buf = new StringBuilder();
             for (VarSpec varspec : exp) {
               String val = eval(varspec, context, false, "/", null);
               if (val != null)
                 buf.append('/');
               buf.append(val != null ? val : "");
             }
             return buf.toString();
         }
     }

     /**
      * Path Param Expansion Operation ({;VAR})
      */
     private static final class PathParamExpansionOperation extends Operation {
         private static final long serialVersionUID = 4556090632293646419L;
         public String evaluate(Expression exp, Context context) {
             StringBuilder buf = new StringBuilder();
             for (VarSpec varspec : exp) {
               String val = eval(varspec, context, false, ";", null);
               if (val != null)
                 buf.append(';');
               if (!varspec.isExplode()) {
                 if (val != null)
                   buf.append(varspec.getName());
                 if (val != null && val.length() > 0)
                   buf.append("=");
               }
               buf.append(val != null ? val : "");
             }
             return buf.toString();
         }
     }

     /**
      * Form Expansion Operation ({?VAR})
      */
     private static final class FormExpansionOperation extends Operation {
         private static final long serialVersionUID = -2166695868296435715L;
         public String evaluate(Expression exp, Context context) {
             StringBuilder buf = new StringBuilder();
             boolean first = true;
             buf.append("?");
             for (VarSpec varspec : exp) {
               String val = eval(varspec, context, false, "&", varspec.getName() + "=");
               if (context.contains(varspec.getName())) {
                 if (!first) buf.append('&');
                 if ((val != null && !varspec.isExplode()) || varspec.isNoval()) {
                   buf.append(varspec.getName());
                 }
                 if (val != null && !varspec.isExplode() && (!varspec.isNoval() || val.length() > 0) )
                   buf.append("=");
                 if (val != null && val.length() > 0)
                   buf.append(val);
               }
               first = false;
             }
             return buf.toString();
         }
     }

     /**
      * Query Expansion Operation ({&VAR})
      */
     private static final class QueryExpansionOperation extends Operation {
         private static final long serialVersionUID = 4029538625501399067L;
         public String evaluate(Expression exp, Context context) {
             StringBuilder buf = new StringBuilder();
             for (VarSpec varspec : exp) {
               String val = eval(varspec, context, false, "&", varspec.getName() + "=");
               if (context.contains(varspec.getName())) {
                 if ((val != null && !varspec.isExplode()) || varspec.isNoval())
                   buf.append('&').append(varspec.getName());
                 if (val != null && !varspec.isExplode() && (!varspec.isNoval() || val.length() > 0) )
                   buf.append("=");
                   if (val != null && val.length() > 0)
                     buf.append(val);
                 }
             }
             return buf.toString();
         }
     }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. 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. For additional information regarding
	* copyright in this work, please see the NOTICE file in the top level
	* directory of this distribution.
	*/
	package org.apache.abdera2.common.templates;

	import java.io.ByteArrayInputStream;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.Serializable;
	import java.nio.CharBuffer;
	import java.util.Enumeration;
	import java.util.HashMap;
	import java.util.Iterator;
	import java.util.Map;

	import org.apache.abdera2.common.templates.Context;
	import org.apache.abdera2.common.templates.Expression;
	import org.apache.abdera2.common.templates.Operation;
	import org.apache.abdera2.common.templates.Expression.VarSpec;
	import org.apache.abdera2.common.text.CharUtils;
	import org.apache.abdera2.common.text.UrlEncoding;

	import com.ibm.icu.text.Normalizer2;

	@SuppressWarnings("unchecked")
	public abstract class Operation implements Serializable {

	private static final long serialVersionUID = -1734350302144527120L;
	public abstract String evaluate(Expression exp, Context context);

	private static Map<String, Operation> operations = getOperations();

	private static Map<String, Operation> getOperations() {
	Map<String, Operation> ops = new HashMap<String, Operation>();
	ops.put("", new DefaultOperation());
	ops.put("+", new ReservedExpansionOperation());
	ops.put("#", new FragmentExpansionOperation());
	ops.put(".", new DotExpansionOperation());
	ops.put("/", new PathExpansionOperation());
	ops.put(";", new PathParamExpansionOperation());
	ops.put("?", new FormExpansionOperation());
	ops.put("&", new QueryExpansionOperation());
	return ops;
	}

	/**
	* Register a new operation. The built in operations cannot be
	* overridden. Key should be a single character. This method
	* is not synchronized; it is not recommended that registrations
	* be allowed from multiple threads or while multiple threads are
	* expanding templates. Perform all registrations <i>before</i>
	* any template expansion occurs.
	*/
	public static void register(String key, Operation operation) {
	if ("+#./;?&".contains(key))
	throw new IllegalArgumentException(
	"Cannot override reserved operators");
	operations.put(key, operation);
	}

	public static Operation get(String name) {
	if (name == null)
	name = "";
	Operation op = operations.get(name);
	if (op != null)
	return op;
	throw new UnsupportedOperationException(name);
	}

	protected static String eval(
	VarSpec varspec,
	Context context,
	boolean reserved,
	String explodeDelim,
	String explodePfx) {
	String name = varspec.getName();
	Object rep = context.resolve(name);
	String val = toString(
	rep,
	context,
	reserved,
	varspec.isExplode(),
	explodeDelim,
	explodePfx,
	varspec.getLength());
	return val;
	}

	private static CharSequence trim(CharSequence val, int len) {
	if (val != null && len > -1 && val.length() > len)
	val = val.subSequence(0,len);
	return val;
	}

	private static String normalize(CharSequence s) {
	return Normalizer2.getInstance(
	null,
	"nfc",
	Normalizer2.Mode.COMPOSE)
	.normalize(s);
	}

	private static String toString(
	Object val,
	Context context,
	boolean reserved,
	boolean explode,
	String explodeDelim,
	String explodePfx,
	int len) {
	if (val == null)
	return null;
	if (val.getClass().isArray()) {
	if (val instanceof byte[]) {
	return UrlEncoding.encode((byte[])val);
	} else if (val instanceof char[]) {
	String chars = (String)trim(new String((char[])val),len);
	return !reserved ?
	UrlEncoding.encode(
	normalize(chars),
	context.isIri()
	? CharUtils.Profile.IUNRESERVED :
	CharUtils.Profile.UNRESERVED) :
	UrlEncoding.encode(
	normalize(chars),
	context.isIri()
	? CharUtils.Profile.RESERVEDANDIUNRESERVED :
	CharUtils.Profile.RESERVEDANDUNRESERVED);
	} else if (val instanceof short[]) {
	StringBuilder buf = new StringBuilder();
	short[] array = (short[])val;
	for (short obj : array) {
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(trim(String.valueOf(obj),len));
	}
	return buf.toString();
	} else if (val instanceof int[]) {
	StringBuilder buf = new StringBuilder();
	int[] array = (int[])val;
	for (int obj : array) {
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(trim(String.valueOf(obj),len));
	}
	return buf.toString();
	} else if (val instanceof long[]) {
	StringBuilder buf = new StringBuilder();
	long[] array = (long[])val;
	for (long obj : array) {
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(trim(String.valueOf(obj),len));
	}
	return buf.toString();
	} else if (val instanceof double[]) {
	StringBuilder buf = new StringBuilder();
	double[] array = (double[])val;
	for (double obj : array) {
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(trim(String.valueOf(obj),len));
	}
	return buf.toString();
	} else if (val instanceof float[]) {
	StringBuilder buf = new StringBuilder();
	float[] array = (float[])val;
	for (float obj : array) {
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(trim(String.valueOf(obj),len));
	}
	return buf.toString();
	} else if (val instanceof boolean[]) {
	StringBuilder buf = new StringBuilder();
	boolean[] array = (boolean[])val;
	for (boolean obj : array) {
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(trim(String.valueOf(obj),len));
	}
	return buf.toString();
	} else {
	StringBuilder buf = new StringBuilder();
	Object[] array = (Object[])val;
	for (Object obj : array) {
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(toString(obj, context, reserved, false, null, null, len));
	}
	return buf.toString();
	}
	} else if (val instanceof InputStream) {
	try {
	if (len > -1) {
	byte[] buf = new byte[len];
	int r = ((InputStream)val).read(buf);
	byte[] dat = new byte[r];
	System.arraycopy(buf, 0, dat, 0, r);
	val = new ByteArrayInputStream(dat);
	}
	return UrlEncoding.encode((InputStream)val);
	} catch (IOException e) {
	throw new RuntimeException(e);
	}
	} else if (val instanceof Readable) {
	try {
	if (len > -1) {
	CharBuffer buf = CharBuffer.allocate(len);
	int r = ((Readable)val).read(buf);
	buf.limit(r);
	buf.position(0);
	val = buf;
	}
	return !reserved ?
	UrlEncoding.encode(
	(Readable)val,
	"UTF-8",
	context.isIri() ?
	CharUtils.Profile.IUNRESERVED :
	CharUtils.Profile.UNRESERVED) :
	UrlEncoding.encode(
	(Readable)val,
	"UTF-8",
	context.isIri() ?
	CharUtils.Profile.RESERVEDANDIUNRESERVED :
	CharUtils.Profile.RESERVEDANDUNRESERVED);
	} catch (IOException e) {
	throw new RuntimeException(e);
	}
	} else if (val instanceof CharSequence) {
	val = normalize((CharSequence)val);
	return encode((CharSequence)val, context.isIri(), reserved);
	} else if (val instanceof Byte) {
	return UrlEncoding.encode(((Byte)val).byteValue());
	} else if (val instanceof Iterable) {
	StringBuilder buf = new StringBuilder();
	Iterable<Object> i = (Iterable<Object>)val;
	for (Object obj : i) {
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(toString(obj, context, reserved, false, null, null, len));
	}
	return buf.toString();
	} else if (val instanceof Iterator) {
	StringBuilder buf = new StringBuilder();
	Iterator<Object> i = (Iterator<Object>)val;
	while (i.hasNext()) {
	Object obj = i.next();
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(toString(obj, context, reserved, false, null, null, len));
	}
	return buf.toString();
	} else if (val instanceof Enumeration) {
	StringBuilder buf = new StringBuilder();
	Enumeration<Object> i = (Enumeration<Object>)val;
	while (i.hasMoreElements()) {
	Object obj = i.nextElement();
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	if (explode && explodePfx != null)
	buf.append(explodePfx);
	buf.append(toString(obj, context, reserved, false, null, null, len));
	}
	return buf.toString();
	} else if (val instanceof Map) {
	StringBuilder buf = new StringBuilder();
	Map<Object,Object> map = (Map<Object,Object>)val;
	for (Map.Entry<Object, Object> entry : map.entrySet()) {
	String _key = toString(entry.getKey(), context, reserved, false, null, null, len);
	String _val = toString(entry.getValue(), context, reserved, false, null, null, len);
	if (buf.length() > 0)
	buf.append(explode && explodeDelim != null ? explodeDelim : ",");
	buf.append(_key)
	.append(explode ? '=' : ',')
	.append(_val);
	}
	return buf.toString();
	} else {
	if (val != null)
	val = normalize(val.toString());
	return encode(val != null ? val.toString() : null, context.isIri(), reserved);
	}
	}

	private static String encode(CharSequence val, boolean isiri, boolean reserved) {
	String v = normalize(val);
	return !reserved ?
	UrlEncoding.encode(v,
	isiri
	? CharUtils.Profile.IUNRESERVED :
	CharUtils.Profile.UNRESERVED) :
	UrlEncoding.encode(v,
	isiri
	? CharUtils.Profile.RESERVEDANDIUNRESERVED :
	CharUtils.Profile.RESERVEDANDUNRESERVED);
	}

	/**
	* Simple String Expansion ({VAR})
	*/
	private static final class DefaultOperation extends Operation {
	private static final long serialVersionUID = 8676696520810767327L;
	public String evaluate(Expression exp, Context context) {
	StringBuilder buf = new StringBuilder();
	boolean first = true;
	for (VarSpec varspec : exp) {
	if (!first) buf.append(',');
	String val = eval(varspec, context, false, ",", null);
	buf.append(val != null ? val : "");
	first = false;
	}
	return buf.toString();
	}
	}

	/**
	* Reserved Expansion Operation ({+VAR})
	*/
	private static final class ReservedExpansionOperation extends Operation {
	private static final long serialVersionUID = 1736980072492867748L;
	public String evaluate(Expression exp, Context context) {
	StringBuilder buf = new StringBuilder();
	boolean first = true;
	for (VarSpec varspec : exp) {
	if (!first) buf.append(',');
	String val = eval(varspec, context, true, ",", null);
	buf.append(val != null ? val : "");
	first = false;
	}
	return buf.toString();
	}
	}

	/**
	* Fragment Expansion Operation ({#VAR})
	*/
	private static final class FragmentExpansionOperation extends Operation {
	private static final long serialVersionUID = -2207953454022197435L;
	public String evaluate(Expression exp, Context context) {
	StringBuilder buf = new StringBuilder();
	boolean first = true;
	for (VarSpec varspec : exp) {
	if (!first) buf.append(',');
	String val = eval(varspec, context, true, ",", null);
	if (first && val != null)
	buf.append('#');
	buf.append(val != null ? val : "");
	first = false;
	}
	return buf.toString();
	}
	}

	/**
	* Dot Expansion Operation ({.VAR})
	*/
	private static final class DotExpansionOperation extends Operation {
	private static final long serialVersionUID = -4357734926260213270L;
	public String evaluate(Expression exp, Context context) {
	StringBuilder buf = new StringBuilder();
	for (VarSpec varspec : exp) {
	String val = eval(varspec, context, true, ".", null);
	if (val != null)
	buf.append('.');
	buf.append(val != null ? val : "");
	}
	return buf.toString();
	}
	}


	/**
	* Path Expansion Operation ({/VAR})
	*/
	private static final class PathExpansionOperation extends Operation {
	private static final long serialVersionUID = 5578346646541533713L;
	public String evaluate(Expression exp, Context context) {
	StringBuilder buf = new StringBuilder();
	for (VarSpec varspec : exp) {
	String val = eval(varspec, context, false, "/", null);
	if (val != null)
	buf.append('/');
	buf.append(val != null ? val : "");
	}
	return buf.toString();
	}
	}

	/**
	* Path Param Expansion Operation ({;VAR})
	*/
	private static final class PathParamExpansionOperation extends Operation {
	private static final long serialVersionUID = 4556090632293646419L;
	public String evaluate(Expression exp, Context context) {
	StringBuilder buf = new StringBuilder();
	for (VarSpec varspec : exp) {
	String val = eval(varspec, context, false, ";", null);
	if (val != null)
	buf.append(';');
	if (!varspec.isExplode()) {
	if (val != null)
	buf.append(varspec.getName());
	if (val != null && val.length() > 0)
	buf.append("=");
	}
	buf.append(val != null ? val : "");
	}
	return buf.toString();
	}
	}

	/**
	* Form Expansion Operation ({?VAR})
	*/
	private static final class FormExpansionOperation extends Operation {
	private static final long serialVersionUID = -2166695868296435715L;
	public String evaluate(Expression exp, Context context) {
	StringBuilder buf = new StringBuilder();
	boolean first = true;
	buf.append("?");
	for (VarSpec varspec : exp) {
	String val = eval(varspec, context, false, "&", varspec.getName() + "=");
	if (context.contains(varspec.getName())) {
	if (!first) buf.append('&');
	if ((val != null && !varspec.isExplode()) \|\| varspec.isNoval()) {
	buf.append(varspec.getName());
	}
	if (val != null && !varspec.isExplode() && (!varspec.isNoval() \|\| val.length() > 0) )
	buf.append("=");
	if (val != null && val.length() > 0)
	buf.append(val);
	}
	first = false;
	}
	return buf.toString();
	}
	}

	/**
	* Query Expansion Operation ({&VAR})
	*/
	private static final class QueryExpansionOperation extends Operation {
	private static final long serialVersionUID = 4029538625501399067L;
	public String evaluate(Expression exp, Context context) {
	StringBuilder buf = new StringBuilder();
	for (VarSpec varspec : exp) {
	String val = eval(varspec, context, false, "&", varspec.getName() + "=");
	if (context.contains(varspec.getName())) {
	if ((val != null && !varspec.isExplode()) \|\| varspec.isNoval())
	buf.append('&').append(varspec.getName());
	if (val != null && !varspec.isExplode() && (!varspec.isNoval() \|\| val.length() > 0) )
	buf.append("=");
	if (val != null && val.length() > 0)
	buf.append(val);
	}
	}
	return buf.toString();
	}
	}
	}