001package org.hl7.fhir.utilities.graphql;
002
003/*
004  Copyright (c) 2011+, HL7, Inc.
005  All rights reserved.
006  
007  Redistribution and use in source and binary forms, with or without modification, 
008  are permitted provided that the following conditions are met:
009    
010   * Redistributions of source code must retain the above copyright notice, this 
011     list of conditions and the following disclaimer.
012   * Redistributions in binary form must reproduce the above copyright notice, 
013     this list of conditions and the following disclaimer in the documentation 
014     and/or other materials provided with the distribution.
015   * Neither the name of HL7 nor the names of its contributors may be used to 
016     endorse or promote products derived from this software without specific 
017     prior written permission.
018  
019  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
020  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
021  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
022  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
023  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
024  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
025  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
026  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
027  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
028  POSSIBILITY OF SUCH DAMAGE.
029  
030 */
031
032
033
034import java.util.ArrayList;
035import java.util.List;
036
037import com.google.gson.JsonArray;
038import com.google.gson.JsonElement;
039import com.google.gson.JsonObject;
040import com.google.gson.JsonPrimitive;
041
042public class Argument {
043  public enum ArgumentListStatus {NOT_SPECIFIED, SINGLETON, REPEATING}
044  String name;
045  private List<Value> values = new ArrayList<Value>();
046  ArgumentListStatus listStatus;
047  public Argument() {
048    super();
049  }
050  public Argument(String name, Value value) {
051    super();
052    this.name = name;
053    this.values.add(value);
054  }
055  public Argument(String name, JsonElement json) throws EGraphQLException {
056    super();
057    this.name = name;
058    valuesFromNode(json);
059  }
060  public String getName() {
061    return name;
062  }
063  public void setName(String name) {
064    this.name = name;
065  }
066  public ArgumentListStatus getListStatus() {
067    return listStatus;
068  }
069  public void setListStatus(ArgumentListStatus listStatus) {
070    this.listStatus = listStatus;
071  }
072  public List<Value> getValues() {
073    return values;
074  }
075  public void addValue(Value value){ 
076    values.add(value);
077  }
078
079  public boolean hasValue(String value) {
080    for (Value v : values ) 
081      if (v.isValue(value)) 
082        return true;
083    return false;
084  }
085
086  public void valuesFromNode(JsonElement json) throws EGraphQLException {
087    if (json instanceof JsonPrimitive && ((JsonPrimitive) json).isString())
088      values.add(new StringValue(((JsonPrimitive)json).getAsString()));
089    else if (json instanceof JsonPrimitive && ((JsonPrimitive) json).isNumber())
090      values.add(new NumberValue(((JsonPrimitive)json).getAsString()));
091    else if (json instanceof JsonPrimitive && ((JsonPrimitive) json).isBoolean())
092      values.add(new NameValue(((JsonPrimitive)json).getAsBoolean()));
093    else if (json instanceof JsonObject)
094      values.add(new ObjectValue((JsonObject) json));
095    else if (json instanceof JsonArray) {
096      for (JsonElement v : (JsonArray) json)
097        valuesFromNode(v);
098    } else
099      throw new EGraphQLException("Unexpected JSON type for \""+name+"\": "+json.getClass().getName());
100  }
101
102  public void write(StringBuilder b, int indent) throws EGraphQLException, EGraphEngine {
103    b.append("\"");
104    for (char ch : name.toCharArray()) {
105      if (ch == '"') b.append("\\\"");
106      else if (ch == '\\') b.append("\\\\");
107      else if (ch == '\r') b.append("\\r");
108      else if (ch == '\n') b.append("\\n");
109      else if (ch == '\t') b.append("\\t");
110      else if (ch < 32)
111        b.append("\\u"+Integer.toHexString(ch));
112      else
113        b.append(ch);
114    }
115    b.append("\":");
116    if (listStatus == ArgumentListStatus.REPEATING) {
117      b.append("[");
118      boolean first = true;
119      for (Value v : values) {
120        if (first) first = false; else b.append(",");
121        v.write(b, indent);
122      }
123      b.append("]");
124    } else {
125      if (values.size() > 1)
126        throw new EGraphQLException("Internal error: non list \""+name+"\" has "+Integer.toString(values.size())+" values");
127      if (values.size() == 0)
128        b.append("null");
129      else
130        values.get(0).write(b, indent);
131    }
132  }
133}