Java CatchNode类代码示例

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterCatchNode(final CatchNode catchNode) {
    enterDefault(catchNode);

    type("CatchClause");
    comma();

    property("param");
    catchNode.getException().accept(this);
    comma();

    final Node guard = catchNode.getExceptionCondition();
    if (guard != null) {
        property("guard");
        guard.accept(this);
        comma();
    }

    property("body");
    catchNode.getBody().accept(this);

    return leave();
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterTryNode(final TryNode tryNode) {
    tryNode.toString(sb, printTypes);
    printLocalVariableConversion(tryNode);
    tryNode.getBody().accept(this);

    final List<Block> catchBlocks = tryNode.getCatchBlocks();

    for (final Block catchBlock : catchBlocks) {
        final CatchNode catchNode = (CatchNode)catchBlock.getStatements().get(0);
        catchNode.toString(sb, printTypes);
        catchNode.getBody().accept(this);
    }

    final Block finallyBody = tryNode.getFinallyBody();

    if (finallyBody != null) {
        sb.append(" finally ");
        finallyBody.accept(this);
    }

    return false;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterCatchNode(final CatchNode catchNode) {
    final IdentNode exception = catchNode.getException();
    final Block     block     = lc.getCurrentBlock();

    start(catchNode);

    // define block-local exception variable
    final String exname = exception.getName();
    // If the name of the exception starts with ":e", this is a synthetic catch block, likely a catch-all. Its
    // symbol is naturally internal, and should be treated as such.
    final boolean isInternal = exname.startsWith(EXCEPTION_PREFIX.symbolName());
    // IS_LET flag is required to make sure symbol is not visible outside catch block. However, we need to
    // clear the IS_LET flag after creation to allow redefinition of symbol inside the catch block.
    final Symbol symbol = defineSymbol(block, exname, catchNode, IS_VAR | IS_LET | (isInternal ? IS_INTERNAL : 0) | HAS_OBJECT_VALUE);
    symbol.clearFlag(IS_LET);

    return true;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterTryNode(final TryNode tryNode) {
    final List<? extends CatchNode> catchNodes = tryNode.getCatches();
    final List<CatchTreeImpl> catchTrees = new ArrayList<>(catchNodes.size());
    for (final CatchNode catchNode : catchNodes) {
        catchTrees.add(new CatchTreeImpl(catchNode,
                translateExpr(catchNode.getException()),
                (BlockTree) translateBlock(catchNode.getBody()),
                translateExpr(catchNode.getExceptionCondition())));
    }

    curStat = new TryTreeImpl(tryNode,
            (BlockTree) translateBlock(tryNode.getBody()),
            catchTrees,
            (BlockTree) translateBlock(tryNode.getFinallyBody()));

    return false;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterTryNode(final TryNode tryNode) {
    tryNode.toString(sb, printTypes);
    printLocalVariableConversion(tryNode);
    tryNode.getBody().accept(this);

    final List<Block> catchBlocks = tryNode.getCatchBlocks();

    for (final Block catchBlock : catchBlocks) {
        final CatchNode catchNode = (CatchNode)catchBlock.getStatements().get(0);
        catchNode.toString(sb, printTypes);
        catchNode.getBody().accept(this);
    }

    final Block finallyBody = tryNode.getFinallyBody();

    if (finallyBody != null) {
        sb.append(" finally ");
        finallyBody.accept(this);
    }

    for (final Block inlinedFinally : tryNode.getInlinedFinallies()) {
        inlinedFinally.accept(this);
    }
    return false;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterCatchNode(final CatchNode catchNode) {
    final IdentNode exception = catchNode.getExceptionIdentifier();
    final Block     block     = lc.getCurrentBlock();

    start(catchNode);

    // define block-local exception variable
    final String exname = exception.getName();
    // If the name of the exception starts with ":e", this is a synthetic catch block, likely a catch-all. Its
    // symbol is naturally internal, and should be treated as such.
    final boolean isInternal = exname.startsWith(EXCEPTION_PREFIX.symbolName());
    // IS_LET flag is required to make sure symbol is not visible outside catch block. However, we need to
    // clear the IS_LET flag after creation to allow redefinition of symbol inside the catch block.
    final Symbol symbol = defineSymbol(block, exname, catchNode, IS_VAR | IS_LET | (isInternal ? IS_INTERNAL : 0) | HAS_OBJECT_VALUE);
    symbol.clearFlag(IS_LET);

    return true;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterTryNode(final TryNode tryNode) {
    final List<? extends CatchNode> catchNodes = tryNode.getCatches();
    final List<CatchTreeImpl> catchTrees = new ArrayList<>(catchNodes.size());
    for (final CatchNode catchNode : catchNodes) {
        catchTrees.add(new CatchTreeImpl(catchNode,
                translateIdent(catchNode.getException()),
                (BlockTree) translateBlock(catchNode.getBody()),
                translateExpr(catchNode.getExceptionCondition())));
    }

    curStat = new TryTreeImpl(tryNode,
            (BlockTree) translateBlock(tryNode.getBody()),
            catchTrees,
            (BlockTree) translateBlock(tryNode.getFinallyBody()));

    return false;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterTryNode(final TryNode tryNode) {
    tryNode.toString(sb);
    tryNode.getBody().accept(this);

    final List<Block> catchBlocks = tryNode.getCatchBlocks();

    for (final Block catchBlock : catchBlocks) {
        final CatchNode catchNode = (CatchNode)catchBlock.getStatements().get(0);
        catchNode.toString(sb);
        catchNode.getBody().accept(this);
    }

    final Block finallyBody = tryNode.getFinallyBody();

    if (finallyBody != null) {
        sb.append(" finally ");
        finallyBody.accept(this);
    }

    return false;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterCatchNode(final CatchNode catchNode) {
    final IdentNode exception = catchNode.getException();
    final Block     block     = lc.getCurrentBlock();

    start(catchNode);
    catchNestingLevel++;

    // define block-local exception variable
    final String exname = exception.getName();
    final Symbol def = defineSymbol(block, exname, IS_VAR | IS_LET | IS_ALWAYS_DEFINED);
    newType(def, Type.OBJECT); //we can catch anything, not just ecma exceptions

    addLocalDef(exname);

    return true;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
private TryNode ensureUnconditionalCatch(final TryNode tryNode) {
    final List<CatchNode> catches = tryNode.getCatches();
    if(catches == null || catches.isEmpty() || catches.get(catches.size() - 1).getExceptionCondition() == null) {
        return tryNode;
    }
    // If the last catch block is conditional, add an unconditional rethrow block
    final List<Block> newCatchBlocks = new ArrayList<>(tryNode.getCatchBlocks());

    newCatchBlocks.add(catchAllBlock(tryNode));
    return tryNode.setCatchBlocks(newCatchBlocks);
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
CatchTreeImpl(final CatchNode node,
        final ExpressionTree param,
        final BlockTree block,
        final ExpressionTree condition) {
    super(node);
    this.param = param;
    this.block = block;
    this.condition = condition;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
@Override
public boolean enterCatchNode(final CatchNode catchNode) {
    Expression exception = catchNode.getException();
    if ((exception != null) && !(exception instanceof IdentNode)) {
        throwNotImplementedYet("es6.destructuring", exception);
    }
    return true;
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
private TryNode ensureUnconditionalCatch(final TryNode tryNode) {
    final List<CatchNode> catches = tryNode.getCatches();
    if(catches == null || catches.isEmpty() || catches.get(catches.size() - 1).getExceptionCondition() == null) {
        return tryNode;
    }
    // If the last catch block is conditional, add an unconditional rethrow block
    final List<Block> newCatchBlocks = new ArrayList<>(tryNode.getCatchBlocks());

    newCatchBlocks.add(catchAllBlock(tryNode));
    return tryNode.setCatchBlocks(lc, newCatchBlocks);
}
 

import jdk.nashorn.internal.ir.CatchNode; //导入依赖的package包/类
CatchTreeImpl(final CatchNode node,
        final IdentifierTree param,
        final BlockTree block,
        final ExpressionTree condition) {
    super(node);
    this.param = param;
    this.block = block;
    this.condition = condition;
}