svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / DefaultCodeBuilder.java @ 44006
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| 1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl; |
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| 2 | |||
| 3 | import java.util.ArrayList; |
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| 4 | import java.util.Iterator; |
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| 5 | import java.util.List; |
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| 6 | 43519 | jjdelcerro | import org.apache.commons.lang3.StringUtils; |
| 7 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.Code; |
| 8 | import static org.gvsig.expressionevaluator.Code.CALLER; |
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| 9 | import static org.gvsig.expressionevaluator.Code.CONSTANT; |
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| 10 | 44006 | jjdelcerro | import static org.gvsig.expressionevaluator.Code.IDENTIFIER; |
| 11 | import static org.gvsig.expressionevaluator.Code.UNDEFINED; |
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| 12 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.Code.Caller; |
| 13 | import org.gvsig.expressionevaluator.Code.Caller.Arguments; |
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| 14 | import org.gvsig.expressionevaluator.Code.Constant; |
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| 15 | import org.gvsig.expressionevaluator.Code.Identifier; |
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| 16 | 43939 | jjdelcerro | import org.gvsig.expressionevaluator.Code.Method; |
| 17 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.CodeBuilder; |
| 18 | import org.gvsig.expressionevaluator.Function; |
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| 19 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Interpreter; |
| 20 | 43512 | jjdelcerro | import org.gvsig.tools.exception.BaseException; |
| 21 | import org.gvsig.tools.visitor.Visitor; |
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| 22 | |||
| 23 | public class DefaultCodeBuilder implements CodeBuilder { |
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| 24 | |||
| 25 | public class BaseCode implements Code { |
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| 26 | |||
| 27 | @Override
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| 28 | public int code() { |
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| 29 | return UNDEFINED;
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| 30 | } |
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| 31 | |||
| 32 | 43521 | jjdelcerro | // @Override
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| 33 | // public String toString() {
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| 34 | // return this.toString(this);
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| 35 | // }
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| 36 | //
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| 37 | // private String toString(Code code) {
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| 38 | // StringBuilder builder = new StringBuilder();
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| 39 | // switch( code.code() ) {
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| 40 | // case CONSTANT: {
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| 41 | // Object value = ((Constant) code).value();
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| 42 | // if( value instanceof CharSequence ) {
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| 43 | // value = StringUtils.wrap(value.toString(), "'");
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| 44 | // }
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| 45 | // builder.append(value);
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| 46 | // }
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| 47 | // break;
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| 48 | //
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| 49 | // case IDENTIFIER:
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| 50 | // builder.append(((Identifier) code).name());
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| 51 | // break;
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| 52 | //
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| 53 | // case CALLER:
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| 54 | // Caller caller = (Caller) code;
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| 55 | // builder.append(caller.name());
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| 56 | // builder.append("(");
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| 57 | // if( caller.args() != null ) {
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| 58 | // boolean skipcoma = true;
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| 59 | // for( Code arg : caller.args() ) {
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| 60 | // if( skipcoma ) {
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| 61 | // skipcoma = false;
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| 62 | // } else {
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| 63 | // builder.append(", ");
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| 64 | // }
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| 65 | // builder.append(toString(arg));
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| 66 | // }
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| 67 | // }
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| 68 | // builder.append(")");
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| 69 | // break;
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| 70 | // }
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| 71 | // return builder.toString();
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| 72 | // }
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| 73 | 43512 | jjdelcerro | |
| 74 | @Override
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| 75 | public void accept(Visitor visitor) throws BaseException { |
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| 76 | visitor.visit(this);
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| 77 | } |
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| 78 | |||
| 79 | } |
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| 80 | |||
| 81 | class BaseConstant extends BaseCode implements Constant { |
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| 82 | |||
| 83 | private final Object value; |
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| 84 | |||
| 85 | public BaseConstant(Object value) { |
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| 86 | this.value = value;
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| 87 | } |
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| 88 | |||
| 89 | @Override
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| 90 | public int code() { |
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| 91 | return CONSTANT;
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| 92 | } |
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| 93 | |||
| 94 | @Override
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| 95 | public Object value() { |
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| 96 | return this.value; |
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| 97 | } |
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| 98 | |||
| 99 | 43521 | jjdelcerro | @Override
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| 100 | public String toString() { |
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| 101 | StringBuilder builder = new StringBuilder(); |
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| 102 | Object v = this.value(); |
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| 103 | if( v instanceof CharSequence ) { |
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| 104 | v = StringUtils.wrap(v.toString(), "'");
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| 105 | } |
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| 106 | builder.append(v); |
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| 107 | return builder.toString();
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| 108 | } |
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| 109 | |||
| 110 | 43512 | jjdelcerro | } |
| 111 | |||
| 112 | public class BaseIdentifier extends BaseCode implements Identifier { |
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| 113 | |||
| 114 | String name;
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| 115 | |||
| 116 | public BaseIdentifier(String name) { |
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| 117 | this.name = name;
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| 118 | } |
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| 119 | |||
| 120 | @Override
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| 121 | public int code() { |
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| 122 | return IDENTIFIER;
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| 123 | } |
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| 124 | |||
| 125 | @Override
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| 126 | public String name() { |
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| 127 | return this.name; |
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| 128 | } |
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| 129 | |||
| 130 | 43521 | jjdelcerro | @Override
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| 131 | public String toString() { |
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| 132 | StringBuilder builder = new StringBuilder(); |
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| 133 | 44006 | jjdelcerro | builder.append("\"");
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| 134 | 43521 | jjdelcerro | builder.append(this.name());
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| 135 | 44006 | jjdelcerro | builder.append("\"");
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| 136 | 43521 | jjdelcerro | return builder.toString();
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| 137 | } |
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| 138 | |||
| 139 | 43512 | jjdelcerro | } |
| 140 | |||
| 141 | public class BaseArguments implements Arguments { |
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| 142 | |||
| 143 | private final List<Code> args; |
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| 144 | |||
| 145 | public BaseArguments() {
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| 146 | this.args = new ArrayList<>(); |
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| 147 | } |
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| 148 | |||
| 149 | @Override
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| 150 | public int count() { |
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| 151 | if( args == null ) { |
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| 152 | return 0; |
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| 153 | } |
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| 154 | return this.args.size(); |
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| 155 | } |
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| 156 | |||
| 157 | public void add(Code arg) { |
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| 158 | this.args.add(arg);
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| 159 | } |
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| 160 | |||
| 161 | @Override
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| 162 | public Iterator<Code> iterator() { |
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| 163 | return this.args.iterator(); |
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| 164 | } |
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| 165 | |||
| 166 | @Override
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| 167 | public Code get(int n) { |
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| 168 | return this.args.get(n); |
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| 169 | } |
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| 170 | |||
| 171 | @Override
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| 172 | public void accept(Visitor visitor) throws BaseException { |
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| 173 | 43521 | jjdelcerro | for( Code arg : this.args ) { |
| 174 | 43512 | jjdelcerro | visitor.visit(arg); |
| 175 | } |
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| 176 | } |
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| 177 | |||
| 178 | 43521 | jjdelcerro | @Override
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| 179 | public String toString() { |
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| 180 | if( args != null ) { |
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| 181 | StringBuilder builder = new StringBuilder(); |
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| 182 | boolean skipcoma = true; |
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| 183 | for( Code arg : args ) {
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| 184 | if( skipcoma ) {
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| 185 | skipcoma = false;
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| 186 | } else {
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| 187 | builder.append(", ");
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| 188 | } |
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| 189 | builder.append(arg.toString()); |
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| 190 | } |
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| 191 | return builder.toString();
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| 192 | } |
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| 193 | return ""; |
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| 194 | } |
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| 195 | |||
| 196 | 43512 | jjdelcerro | } |
| 197 | |||
| 198 | public class BaseCaller extends BaseCode implements Caller { |
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| 199 | |||
| 200 | private final String name; |
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| 201 | private final Arguments args; |
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| 202 | private Function function;
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| 203 | private final int type; |
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| 204 | |||
| 205 | public BaseCaller(String name, int type, Arguments args) { |
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| 206 | this.name = name;
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| 207 | this.args = args;
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| 208 | this.type = type;
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| 209 | this.function = null; |
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| 210 | } |
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| 211 | |||
| 212 | @Override
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| 213 | public int code() { |
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| 214 | return CALLER;
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| 215 | } |
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| 216 | |||
| 217 | @Override
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| 218 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
| 219 | return this.function.call(interpreter, args); |
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| 220 | 43512 | jjdelcerro | } |
| 221 | |||
| 222 | @Override
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| 223 | public String name() { |
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| 224 | return this.name; |
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| 225 | } |
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| 226 | |||
| 227 | @Override
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| 228 | public Function function() {
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| 229 | return this.function; |
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| 230 | } |
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| 231 | |||
| 232 | @Override
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| 233 | public Function function(Function function) {
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| 234 | this.function = function;
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| 235 | return this.function; |
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| 236 | } |
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| 237 | |||
| 238 | @Override
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| 239 | public Code.Caller.Arguments args() {
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| 240 | return this.args; |
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| 241 | } |
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| 242 | |||
| 243 | @Override
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| 244 | public int type() { |
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| 245 | return this.type; |
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| 246 | } |
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| 247 | |||
| 248 | @Override
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| 249 | public void accept(Visitor visitor) throws BaseException { |
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| 250 | visitor.visit(this);
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| 251 | this.args.accept(visitor);
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| 252 | } |
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| 253 | |||
| 254 | 43521 | jjdelcerro | @Override
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| 255 | public String toString() { |
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| 256 | StringBuilder builder = new StringBuilder(); |
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| 257 | builder.append(this.name());
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| 258 | builder.append("(");
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| 259 | if( this.args()!=null ) { |
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| 260 | builder.append(this.args().toString());
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| 261 | } |
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| 262 | builder.append(")");
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| 263 | return builder.toString();
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| 264 | } |
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| 265 | |||
| 266 | 43512 | jjdelcerro | } |
| 267 | |||
| 268 | 43939 | jjdelcerro | public class BaseMethod extends BaseCaller implements Method { |
| 269 | |||
| 270 | private final Code obj; |
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| 271 | private final String methodname; |
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| 272 | |||
| 273 | public BaseMethod(Code obj, String methodname, Arguments args) { |
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| 274 | super(methodname, FUNCTION, args);
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| 275 | this.obj = obj;
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| 276 | this.methodname = methodname;
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| 277 | } |
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| 278 | |||
| 279 | @Override
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| 280 | public int code() { |
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| 281 | return METHOD;
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| 282 | } |
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| 283 | |||
| 284 | @Override
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| 285 | public String methodname() { |
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| 286 | return this.methodname; |
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| 287 | } |
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| 288 | |||
| 289 | @Override
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| 290 | public Code obj() {
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| 291 | return this.obj; |
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| 292 | } |
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| 293 | |||
| 294 | @Override
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| 295 | public String toString() { |
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| 296 | StringBuilder builder = new StringBuilder(); |
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| 297 | builder.append(this.obj.toString());
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| 298 | builder.append("->");
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| 299 | builder.append(this.methodname());
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| 300 | builder.append("(");
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| 301 | if( this.args()!=null ) { |
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| 302 | builder.append(this.args().toString());
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| 303 | } |
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| 304 | builder.append(")");
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| 305 | return builder.toString();
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| 306 | } |
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| 307 | } |
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| 308 | |||
| 309 | 43512 | jjdelcerro | @Override
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| 310 | 43809 | jjdelcerro | public CodeBuilder clone() throws CloneNotSupportedException { |
| 311 | // This implementation of CodeBuilder does not maintain state, so
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| 312 | // we only call the super class.
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| 313 | DefaultCodeBuilder other = (DefaultCodeBuilder) super.clone();
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| 314 | return other;
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| 315 | } |
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| 316 | |||
| 317 | @Override
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| 318 | 43512 | jjdelcerro | public Constant constant(Object value) { |
| 319 | return new BaseConstant(value); |
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| 320 | } |
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| 321 | |||
| 322 | @Override
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| 323 | public Identifier identifier(String name) { |
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| 324 | return new BaseIdentifier(name); |
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| 325 | } |
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| 326 | |||
| 327 | @Override
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| 328 | public Caller.Arguments args() {
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| 329 | return new BaseArguments(); |
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| 330 | } |
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| 331 | |||
| 332 | @Override
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| 333 | public Caller function(String name, int type, Arguments args) { |
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| 334 | return new BaseCaller(name, type, args); |
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| 335 | } |
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| 336 | |||
| 337 | @Override
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| 338 | public Caller function(String name, Arguments args) { |
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| 339 | return function(name, Caller.FUNCTION, args);
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| 340 | } |
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| 341 | 43939 | jjdelcerro | |
| 342 | 43512 | jjdelcerro | @Override
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| 343 | 43939 | jjdelcerro | public Code method(Code obj, String methodname, Arguments methodargs) { |
| 344 | Method m = new BaseMethod(obj, methodname, methodargs); |
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| 345 | return m;
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| 346 | } |
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| 347 | |||
| 348 | @Override
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| 349 | 43512 | jjdelcerro | public Caller operator(String name, Code arg1) { |
| 350 | Arguments args = args(); |
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| 351 | 43809 | jjdelcerro | ((BaseArguments)args).add(arg1); |
| 352 | 43512 | jjdelcerro | return function(name, Caller.UNARY_OPERATOR, args);
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| 353 | } |
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| 354 | |||
| 355 | @Override
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| 356 | public Caller operator(String name, Code arg1, Code arg2) { |
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| 357 | Arguments args = args(); |
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| 358 | 43809 | jjdelcerro | ((BaseArguments)args).add(arg1); |
| 359 | ((BaseArguments)args).add(arg2); |
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| 360 | 43512 | jjdelcerro | return function(name, Caller.BINARY_OPERATOR, args);
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| 361 | } |
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| 362 | |||
| 363 | @Override
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| 364 | public Code not(Code op1) {
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| 365 | return operator("not", op1); |
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| 366 | } |
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| 367 | |||
| 368 | @Override
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| 369 | public Code add(Code op1, Code op2) {
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| 370 | return operator("+", op1, op2); |
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| 371 | } |
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| 372 | |||
| 373 | @Override
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| 374 | public Code subst(Code op1, Code op2) {
|
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| 375 | return operator("-", op1, op2); |
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| 376 | } |
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| 377 | |||
| 378 | @Override
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| 379 | public Code mult(Code op1, Code op2) {
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| 380 | return operator("*", op1, op2); |
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| 381 | } |
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| 382 | |||
| 383 | @Override
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| 384 | public Code div(Code op1, Code op2) {
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| 385 | return operator("/", op1, op2); |
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| 386 | } |
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| 387 | |||
| 388 | @Override
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| 389 | public Code mod(Code op1, Code op2) {
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| 390 | return operator("%", op1, op2); |
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| 391 | } |
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| 392 | |||
| 393 | @Override
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| 394 | public Code or(Code op1, Code op2) {
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| 395 | return operator("or", op1, op2); |
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| 396 | } |
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| 397 | |||
| 398 | @Override
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| 399 | public Code and(Code op1, Code op2) {
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| 400 | return operator("and", op1, op2); |
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| 401 | } |
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| 402 | |||
| 403 | @Override
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| 404 | public Code like(Code op1, Code op2) {
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| 405 | return operator("like", op1, op2); |
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| 406 | } |
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| 407 | |||
| 408 | @Override
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| 409 | public Code ilike(Code op1, Code op2) {
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| 410 | return operator("ilike", op1, op2); |
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| 411 | } |
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| 412 | |||
| 413 | @Override
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| 414 | 43532 | jjdelcerro | public Code regexp(Code op1, Code op2) {
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| 415 | return operator("~", op1, op2); |
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| 416 | } |
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| 417 | |||
| 418 | @Override
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| 419 | 43512 | jjdelcerro | public Code lt(Code op1, Code op2) {
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| 420 | return operator("<", op1, op2); |
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| 421 | } |
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| 422 | |||
| 423 | @Override
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| 424 | public Code gt(Code op1, Code op2) {
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| 425 | return operator(">", op1, op2); |
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| 426 | } |
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| 427 | |||
| 428 | @Override
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| 429 | public Code le(Code op1, Code op2) {
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| 430 | return operator("<=", op1, op2); |
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| 431 | } |
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| 432 | |||
| 433 | @Override
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| 434 | public Code ge(Code op1, Code op2) {
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| 435 | return operator(">=", op1, op2); |
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| 436 | } |
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| 437 | |||
| 438 | @Override
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| 439 | public Code eq(Code op1, Code op2) {
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| 440 | return operator("=", op1, op2); |
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| 441 | } |
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| 442 | |||
| 443 | @Override
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| 444 | public Code ne(Code op1, Code op2) {
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| 445 | return operator("<>", op1, op2); |
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| 446 | } |
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| 447 | |||
| 448 | @Override
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| 449 | public Code is(Code op1, Code op2) {
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| 450 | return operator("is", op1, op2); |
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| 451 | } |
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| 452 | |||
| 453 | 43939 | jjdelcerro | @Override
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| 454 | public Code getattr(Code obj, String attrname) { |
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| 455 | Arguments args = args(); |
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| 456 | ((BaseArguments)args).add(obj); |
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| 457 | ((BaseArguments)args).add(constant(attrname)); |
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| 458 | return function("getattr", args); |
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| 459 | } |
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| 460 | |||
| 461 | 43512 | jjdelcerro | } |