Java JCCatch类代码示例

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
@Override
public Choice<State<JCTry>> visitTry(final TryTree node, State<?> state) {
  return chooseSubtrees(
      state,
      s -> unify(node.getResources(), s),
      s -> unifyStatement(node.getBlock(), s),
      s -> unify(node.getCatches(), s),
      s -> unifyStatement(node.getFinallyBlock(), s),
      (resources, block, catches, finallyBlock) ->
          maker()
              .Try(
                  resources,
                  (JCBlock) block,
                  List.convert(JCCatch.class, catches),
                  (JCBlock) finallyBlock));
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
protected int diffCatch(JCCatch oldT, JCCatch newT, int[] bounds) {
    int localPointer = bounds[0];
    // param
    int[] paramBounds = getBounds(oldT.param);
    copyTo(localPointer, paramBounds[0]);
    localPointer = diffTree(oldT.param, newT.param, paramBounds);
    // body
    int[] bodyBounds = getBounds(oldT.body);
    copyTo(localPointer, bodyBounds[0]);
    localPointer = diffTree(oldT.body, newT.body, bodyBounds);
    copyTo(localPointer, bounds[1]);

    return bounds[1];
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
@Override @DefinedBy(Api.COMPILER_TREE)
public TypeMirror getLub(CatchTree tree) {
    JCCatch ct = (JCCatch) tree;
    JCVariableDecl v = ct.param;
    if (v.type != null && v.type.getKind() == TypeKind.UNION) {
        UnionClassType ut = (UnionClassType) v.type;
        return ut.getLub();
    } else {
        return v.type;
    }
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
private void printCatch(JCCatch catchBlock) {
	print(" catch (");
	printVarDefInline(catchBlock.param); // ExprType1 | ExprType2 handled via JCTypeUnion.
	println(") {");
	indent++;
	for (JCStatement stat : catchBlock.body.stats) print(stat);
	indent--;
	aPrint("}");
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
private JavacNode buildTry(JCTry tryNode) {
	if (setAndGetAsHandled(tryNode)) return null;
	List<JavacNode> childNodes = new ArrayList<JavacNode>();
	for (JCTree varDecl : getResourcesForTryNode(tryNode)) {
		if (varDecl instanceof JCVariableDecl) {
			addIfNotNull(childNodes, buildLocalVar((JCVariableDecl) varDecl, Kind.LOCAL));
		}
	}
	addIfNotNull(childNodes, buildStatement(tryNode.body));
	for (JCCatch jcc : tryNode.catchers) addIfNotNull(childNodes, buildTree(jcc, Kind.STATEMENT));
	addIfNotNull(childNodes, buildStatement(tryNode.finalizer));
	return putInMap(new JavacNode(this, tryNode, childNodes, Kind.STATEMENT));
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
/** For javac, both JCExpression and JCStatement are considered as valid children types. */
@Override
protected Collection<Class<? extends JCTree>> getStatementTypes() {
	Collection<Class<? extends JCTree>> collection = new ArrayList<Class<? extends JCTree>>(3);
	collection.add(JCStatement.class);
	collection.add(JCExpression.class);
	collection.add(JCCatch.class);
	return collection;
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
public void visitCatch(JCCatch that) {
    try {
        print("JCCatch:");
    } catch (Exception e) {
    }
    super.visitCatch(that);
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
public void visitCatch(JCCatch tree) {
	try {
		print(" catch (");
		printExpr(tree.param);
		print(") ");
		printStat(tree.body);
	} catch (IOException e) {
		throw new UncheckedIOException(e);
	}
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
@Override
public Choice<State<JCCatch>> visitCatch(final CatchTree node, State<?> state) {
  return chooseSubtrees(
      state,
      s -> unifyStatement(node.getBlock(), s),
      block -> maker().Catch((JCVariableDecl) node.getParameter(), (JCBlock) block));
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
/** CatchClause     = CATCH "(" FormalParameter ")" Block
 */
protected JCCatch catchClause() {
    int pos = S.pos();
    accept(CATCH);
    accept(LPAREN);
    JCModifiers mods = optFinal(Flags.PARAMETER);
    List<JCExpression> catchTypes = catchTypes();
    JCExpression paramType = catchTypes.size() > 1 ?
            toP(F.at(catchTypes.head.getStartPosition()).TypeUnion(catchTypes)) :
            catchTypes.head;
    JCVariableDecl formal = variableDeclaratorId(mods, paramType);
    accept(RPAREN);
    JCBlock body = block();
    return F.at(pos).Catch(formal, body);
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
public void visitTry(JCTry tree) {
    try {
        print("try ");
        if (tree.resources.nonEmpty()) {
            print("(");
            boolean first = true;
            for (JCTree var : tree.resources) {
                if (!first) {
                    println();
                    indent();
                }
                printStat(var);
                first = false;
            }
            print(") ");
        }
        printStat(tree.body);
        for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) {
            printStat(l.head);
        }
        if (tree.finalizer != null) {
            print(" finally ");
            printStat(tree.finalizer);
        }
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
public void visitCatch(JCCatch tree) {
    try {
        print(" catch (");
        printExpr(tree.param);
        print(") ");
        printStat(tree.body);
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
public void visitTry(JCTry tree) {
    try {
        print("try ");
        List<?> resources = null;
        try {
            Field f = JCTry.class.getField("resources");
            resources = (List<?>) f.get(tree);
        } catch (Exception ignore) {
            // In JDK6 and down this field does not exist; resources will retain its initializer value which is what we want.
        }
        
        if (resources != null && resources.nonEmpty()) {
            boolean first = true;
            print("(");
            for (Object var0 : resources) {
                JCTree var = (JCTree) var0;
                if (!first) {
                    println();
                    indent();
                }
                printStat(var);
                first = false;
            }
            print(") ");
        }
        
        printStat(tree.body);
        for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) {
            printStat(l.head);
        }
        if (tree.finalizer != null) {
            print(" finally ");
            printStat(tree.finalizer);
        }
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
@Override
public void visit(TryWrapper tryWrapper) {
    TreeMaker maker = builder.getTreeMaker();

    JCBlock block = (JCBlock) generate(tryWrapper.getBlock());
    JCBlock finalizer = (JCBlock) generate(tryWrapper.getFinalizer());
    ListBuffer<JCCatch> catches = new ListBuffer<JCCatch>();
    for (CatchWrapper cw : tryWrapper.getCatchers()) {
        catches.append(generate(cw, JCCatch.class));
    }

    result = maker.Try(block, catches.toList(), finalizer);
}
 

import com.sun.tools.javac.tree.JCTree.JCCatch; //导入依赖的package包/类
private boolean matchCatch(JCCatch t1, JCCatch t2) {
    return treesMatch(t1.param, t2.param) && treesMatch(t1.body, t2.body);
}