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annotate truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/generator/DSLExpressionGenerator.java @ 21951:9c8c0937da41

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Moving all sources into truffle subdirectory
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 17 Jun 2015 10:58:08 +0200
parents graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/generator/DSLExpressionGenerator.java@f83fd99b2962
children dc83cc1f94f2
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1 /*
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2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.dsl.processor.generator;
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24
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25 import java.util.*;
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26
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27 import javax.lang.model.element.*;
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28 import javax.lang.model.type.*;
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29
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30 import com.oracle.truffle.dsl.processor.expression.*;
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31 import com.oracle.truffle.dsl.processor.expression.DSLExpression.Binary;
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32 import com.oracle.truffle.dsl.processor.expression.DSLExpression.Call;
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33 import com.oracle.truffle.dsl.processor.expression.DSLExpression.DSLExpressionVisitor;
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34 import com.oracle.truffle.dsl.processor.expression.DSLExpression.IntLiteral;
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35 import com.oracle.truffle.dsl.processor.expression.DSLExpression.Negate;
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36 import com.oracle.truffle.dsl.processor.expression.DSLExpression.Variable;
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37 import com.oracle.truffle.dsl.processor.java.model.*;
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38
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39 public class DSLExpressionGenerator implements DSLExpressionVisitor {
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40
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41 private final Map<Variable, CodeTree> bindings;
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42 private final CodeTree root;
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43 private final Deque<CodeTree> stack = new ArrayDeque<>();
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44
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45 public DSLExpressionGenerator(CodeTree root, Map<Variable, CodeTree> bindings) {
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46 this.bindings = bindings;
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47 this.root = root;
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48 }
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49
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50 public void visitBinary(Binary binary) {
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51 CodeTree right = stack.pop();
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52 CodeTree left = stack.pop();
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53 stack.push(combine(left, string(" " + binary.getOperator() + " "), right));
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54 }
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55
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56 public void visitCall(Call call) {
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57 ExecutableElement method = call.getResolvedMethod();
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58 CodeTree[] parameters = new CodeTree[method.getParameters().size()];
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59 for (int i = 0; i < parameters.length; i++) {
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60 parameters[parameters.length - i - 1] = pop();
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61 }
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62
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63 CodeTreeBuilder builder = CodeTreeBuilder.createBuilder();
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64
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65 if (call.getResolvedMethod().getKind() == ElementKind.CONSTRUCTOR) {
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66 builder.startNew(call.getResolvedType());
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67 } else if (call.getReceiver() == null) {
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68 if (isStatic(method)) {
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69 builder.startStaticCall(method);
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70 } else {
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71 if (root != null) {
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72 builder.tree(root).string(".");
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73 }
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74 builder.startCall(method.getSimpleName().toString());
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75 }
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76 } else {
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77 if (isStatic(method)) {
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78 throw new AssertionError("Static calls must not have receivers.");
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79 }
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80 builder.startCall(pop(), method.getSimpleName().toString());
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81 }
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82 for (CodeTree parameter : parameters) {
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83 builder.tree(parameter);
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84 }
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85 builder.end();
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86
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87 push(builder.build());
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88 }
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89
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90 public void visitIntLiteral(IntLiteral binary) {
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91 push(string(binary.getLiteral()));
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92 }
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93
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94 public void visitNegate(Negate negate) {
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95 push(combine(string("!"), combine(string("("), pop(), string(")"))));
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96 }
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97
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98 public void visitVariable(Variable variable) {
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99 VariableElement resolvedVariable = variable.getResolvedVariable();
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100 CodeTree tree;
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101 if (variable.getResolvedType().getKind() == TypeKind.NULL) {
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102 tree = CodeTreeBuilder.singleString("null");
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103 } else if (variable.getReceiver() == null) {
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104
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105 if (isStatic(resolvedVariable)) {
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106 tree = staticReference(resolvedVariable);
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107 } else {
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108 tree = bindings.get(variable);
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109 boolean bound = true;
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110 if (tree == null) {
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111 tree = string(resolvedVariable.getSimpleName().toString());
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112 bound = false;
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113 }
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114 if (root != null && !bound) {
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115 tree = combine(root, string("."), tree);
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116 }
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117 }
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118 } else {
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119 if (isStatic(resolvedVariable)) {
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120 throw new AssertionError("Static variables cannot have receivers.");
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121 }
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122 tree = combine(pop(), string("."), string(resolvedVariable.getSimpleName().toString()));
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123 }
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124 push(tree);
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125 }
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126
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127 private static boolean isStatic(Element element) {
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128 return element.getModifiers().contains(Modifier.STATIC);
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129 }
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130
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131 private static CodeTree combine(CodeTree tree1, CodeTree tree2) {
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132 return new CodeTreeBuilder(null).startGroup().tree(tree1).tree(tree2).end().build();
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133 }
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134
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135 private static CodeTree combine(CodeTree tree1, CodeTree tree2, CodeTree tree3) {
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136 return new CodeTreeBuilder(null).startGroup().tree(tree1).tree(tree2).tree(tree3).end().build();
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137 }
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138
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139 private static CodeTree string(String s) {
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140 return CodeTreeBuilder.singleString(s);
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141 }
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142
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143 private static CodeTree staticReference(VariableElement var) {
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144 return CodeTreeBuilder.createBuilder().staticReference(var.getEnclosingElement().asType(), var.getSimpleName().toString()).build();
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145 }
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146
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147 private void push(CodeTree tree) {
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148 stack.push(tree);
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149 }
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150
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151 private CodeTree pop() {
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152 return stack.pop();
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153 }
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154
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155 public static CodeTree write(DSLExpression expression, CodeTree root, Map<Variable, CodeTree> bindings) {
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156 DSLExpressionGenerator writer = new DSLExpressionGenerator(root, bindings);
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157 expression.accept(writer);
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158 return combine(string("("), writer.pop(), string(")"));
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159 }
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160
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161 }