Jackson Core Source Code

Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson Core Source Code files are provided in the source packge (jackson-core-2.12.4-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Core Source Code below:

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com/fasterxml/jackson/core/filter/FilteringParserDelegate.java

package com.fasterxml.jackson.core.filter;

import java.io.IOException;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.math.BigInteger;

import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.filter.TokenFilter.Inclusion;
import com.fasterxml.jackson.core.util.JsonParserDelegate;

import static com.fasterxml.jackson.core.JsonTokenId.*;

/**
 * Specialized {@link JsonParserDelegate} that allows use of
 * {@link TokenFilter} for outputting a subset of content that
 * is visible to caller
 * 
 * @since 2.6
 */
public class FilteringParserDelegate extends JsonParserDelegate
{
    /*
    /**********************************************************
    /* Configuration
    /**********************************************************
     */
    
    /**
     * Object consulted to determine whether to write parts of content generator
     * is asked to write or not.
     */
    protected TokenFilter rootFilter;

    /**
     * Flag that determines whether filtering will continue after the first
     * match is indicated or not: if `false`, output is based on just the first
     * full match (returning {@link TokenFilter#INCLUDE_ALL}) and no more
     * checks are made; if `true` then filtering will be applied as necessary
     * until end of content.
     */
    protected boolean _allowMultipleMatches;

    /**
     * Flag that determines whether path leading up to included content should
     * also be automatically included or not. If `false`, no path inclusion is
     * done and only explicitly included entries are output; if `true` then
     * path from main level down to match is also included as necessary.
     */
    protected TokenFilter.Inclusion _inclusion;

    /*
    /**********************************************************
    /* State
    /**********************************************************
     */

    /**
     * Last token retrieved via {@link #nextToken}, if any.
     * Null before the first call to <code>nextToken()</code>,
     * as well as if token has been explicitly cleared
     */
    protected JsonToken _currToken;

    /**
     * Last cleared token, if any: that is, value that was in
     * effect when {@link #clearCurrentToken} was called.
     */
    protected JsonToken _lastClearedToken;
    
    /**
     * During traversal this is the actual "open" parse tree, which sometimes
     * is the same as {@link #_exposedContext}, and at other times is ahead
     * of it. Note that this context is never null.
     */
    protected TokenFilterContext _headContext;

    /**
     * In cases where {@link #_headContext} is "ahead" of context exposed to
     * caller, this context points to what is currently exposed to caller.
     * When the two are in sync, this context reference will be <code>null</code>.
     */
    protected TokenFilterContext _exposedContext;

    /**
     * State that applies to the item within container, used where applicable.
     * Specifically used to pass inclusion state between property name and
     * property, and also used for array elements.
     */
    protected TokenFilter _itemFilter;
    
    /**
     * Number of tokens for which {@link TokenFilter#INCLUDE_ALL}
     * has been returned.
     */
    protected int _matchCount;

    /*
    /**********************************************************
    /* Construction, initialization
    /**********************************************************
     */

    @Deprecated
    public FilteringParserDelegate(JsonParser p, TokenFilter f,
            boolean includePath, boolean allowMultipleMatches)
    {
        this(p, f, includePath ? Inclusion.INCLUDE_ALL_AND_PATH : Inclusion.ONLY_INCLUDE_ALL, allowMultipleMatches);
    }

    public FilteringParserDelegate(JsonParser p, TokenFilter f,
            TokenFilter.Inclusion inclusion, boolean allowMultipleMatches)
    {
        super(p);
        rootFilter = f;
        // and this is the currently active filter for root values
        _itemFilter = f;
        _headContext = TokenFilterContext.createRootContext(f);
        _inclusion = inclusion;
        _allowMultipleMatches = allowMultipleMatches;
    }

    /*
    /**********************************************************
    /* Extended API
    /**********************************************************
     */

    public TokenFilter getFilter() { return rootFilter; }

    /**
     * Accessor for finding number of matches, where specific token and sub-tree
     * starting (if structured type) are passed.
     */
    public int getMatchCount() {
        return _matchCount;
    }

    /*
    /**********************************************************
    /* Public API, token accessors
    /**********************************************************
     */

    @Override public JsonToken getCurrentToken() { return _currToken; }
    @Override public JsonToken currentToken() { return _currToken; }

    @Deprecated // since 2.12
    @Override public final int getCurrentTokenId() {
        return currentTokenId();
    }
    @Override public final int currentTokenId() {
        final JsonToken t = _currToken;
        return (t == null) ? JsonTokenId.ID_NO_TOKEN : t.id();
    }

    @Override public boolean hasCurrentToken() { return _currToken != null; }
    @Override public boolean hasTokenId(int id) {
        final JsonToken t = _currToken;
        if (t == null) {
            return (JsonTokenId.ID_NO_TOKEN == id);
        }
        return t.id() == id;
    }

    @Override public final boolean hasToken(JsonToken t) {
        return (_currToken == t);
    }
    
    @Override public boolean isExpectedStartArrayToken() { return _currToken == JsonToken.START_ARRAY; }
    @Override public boolean isExpectedStartObjectToken() { return _currToken == JsonToken.START_OBJECT; }

    @Override public JsonLocation getCurrentLocation() { return delegate.getCurrentLocation(); }

    @Override
    public JsonStreamContext getParsingContext() {
        return _filterContext();
    }
    
    // !!! TODO: Verify it works as expected: copied from standard JSON parser impl
    @Override
    public String getCurrentName() throws IOException {
        JsonStreamContext ctxt = _filterContext();
        if (_currToken == JsonToken.START_OBJECT || _currToken == JsonToken.START_ARRAY) {
            JsonStreamContext parent = ctxt.getParent();
            return (parent == null) ? null : parent.getCurrentName();
        }
        return ctxt.getCurrentName();
    }

    /*
    /**********************************************************
    /* Public API, token state overrides
    /**********************************************************
     */

    @Override
    public void clearCurrentToken() {
        if (_currToken != null) {
            _lastClearedToken = _currToken;
            _currToken = null;
        }
    }

    @Override
    public JsonToken getLastClearedToken() { return _lastClearedToken; }

    @Override
    public void overrideCurrentName(String name) {
        /* 14-Apr-2015, tatu: Not sure whether this can be supported, and if so,
         *    what to do with it... Delegation won't work for sure, so let's for
         *    now throw an exception
         */
        throw new UnsupportedOperationException("Can not currently override name during filtering read");
    }

    /*
    /**********************************************************
    /* Public API, traversal
    /**********************************************************
     */

    @Override
    public JsonToken nextToken() throws IOException
    {
        // 23-May-2017, tatu: To be honest, code here is rather hairy and I don't like all
        //    conditionals; and it seems odd to return `null` but NOT considering input
        //    as closed... would love a rewrite to simplify/clear up logic here.
        
        // Check for _allowMultipleMatches - false and at least there is one token - which is _currToken
        // check for no buffered context _exposedContext - null
        // If all the conditions matches then check for scalar / non-scalar property

        if (!_allowMultipleMatches && (_currToken != null) && (_exposedContext == null)) {
            // if scalar, and scalar not present in obj/array and _inclusion == ONLY_INCLUDE_ALL
            // and INCLUDE_ALL matched once, return null
            if (_currToken.isScalarValue() && !_headContext.isStartHandled()
                    && _inclusion == Inclusion.ONLY_INCLUDE_ALL
                    && (_itemFilter == TokenFilter.INCLUDE_ALL)) {
                return (_currToken = null);
            }
        }
        // Anything buffered?
        TokenFilterContext ctxt = _exposedContext;

        if (ctxt != null) {
            while (true) {
                JsonToken t = ctxt.nextTokenToRead();
                if (t != null) {
                    _currToken = t;
                    return t;
                }
                // all done with buffered stuff?
                if (ctxt == _headContext) {
                    _exposedContext = null;
                    if (ctxt.inArray()) {
                        t = delegate.getCurrentToken();
// Is this guaranteed to work without further checks?
//                        if (t != JsonToken.START_ARRAY) {
                        _currToken = t;
                        return t;
                    }

                    // Almost! Most likely still have the current token;
                    // with the sole exception of 
                    /*
                    t = delegate.getCurrentToken();
                    if (t != JsonToken.FIELD_NAME) {
                        _currToken = t;
                        return t;
                    }
                    */
                    break;
                }
                // If not, traverse down the context chain
                ctxt = _headContext.findChildOf(ctxt);
                _exposedContext = ctxt;
                if (ctxt == null) { // should never occur
                    throw _constructError("Unexpected problem: chain of filtered context broken");
                }
            }
        }

        // If not, need to read more. If we got any:
        JsonToken t = delegate.nextToken();
        if (t == null) {
            // no strict need to close, since we have no state here
            _currToken = t;
            return t;
        }

        // otherwise... to include or not?
        TokenFilter f;
        
        switch (t.id()) {
        case ID_START_ARRAY:
            f = _itemFilter;
            if (f == TokenFilter.INCLUDE_ALL) {
                _headContext = _headContext.createChildArrayContext(f, true);
                return (_currToken = t);
            }
            if (f == null) { // does this occur?
                delegate.skipChildren();
                break;
            }
            // Otherwise still iffy, need to check
            f = _headContext.checkValue(f);
            if (f == null) {
                delegate.skipChildren();
                break;
            }
            if (f != TokenFilter.INCLUDE_ALL) {
                f = f.filterStartArray();
            }
            _itemFilter = f;
            if (f == TokenFilter.INCLUDE_ALL) {
                _headContext = _headContext.createChildArrayContext(f, true);
                return (_currToken = t);
            } else if (f != null && _inclusion == Inclusion.INCLUDE_NON_NULL) {
                // TODO don't count as match?
                _headContext = _headContext.createChildArrayContext(f, true);
                return (_currToken = t);
            }
            _headContext = _headContext.createChildArrayContext(f, false);

            // Also: only need buffering if parent path to be included
            if (_inclusion == Inclusion.INCLUDE_ALL_AND_PATH) {
                t = _nextTokenWithBuffering(_headContext);
                if (t != null) {
                    _currToken = t;
                    return t;
                }
            }
            break;

        case ID_START_OBJECT:
            f = _itemFilter;
            if (f == TokenFilter.INCLUDE_ALL) {
                _headContext = _headContext.createChildObjectContext(f, true);
                return (_currToken = t);
            }
            if (f == null) { // does this occur?
                delegate.skipChildren();
                break;
            }
            // Otherwise still iffy, need to check
            f = _headContext.checkValue(f);
            if (f == null) {
                delegate.skipChildren();
                break;
            }
            if (f != TokenFilter.INCLUDE_ALL) {
                f = f.filterStartObject();
            }
            _itemFilter = f;
            if (f == TokenFilter.INCLUDE_ALL) {
                _headContext = _headContext.createChildObjectContext(f, true);
                return (_currToken = t);
            } else if (f != null && _inclusion == Inclusion.INCLUDE_NON_NULL) {
                // TODO don't count as match?
                _headContext = _headContext.createChildObjectContext(f, true);
                return (_currToken = t);
            }
            _headContext = _headContext.createChildObjectContext(f, false);
            // Also: only need buffering if parent path to be included
            if (_inclusion == Inclusion.INCLUDE_ALL_AND_PATH) {
                t = _nextTokenWithBuffering(_headContext);
                if (t != null) {
                    _currToken = t;
                    return t;
                }
            }
            // note: inclusion of surrounding Object handled separately via
            // FIELD_NAME
            break;

        case ID_END_ARRAY:
        case ID_END_OBJECT:
            {
                boolean returnEnd = _headContext.isStartHandled();
                f = _headContext.getFilter();
                if ((f != null) && (f != TokenFilter.INCLUDE_ALL)) {
                    f.filterFinishArray();
                }
                _headContext = _headContext.getParent();
                _itemFilter = _headContext.getFilter();
                if (returnEnd) {
                    return (_currToken = t);
                }
            }
            break;

        case ID_FIELD_NAME:
            {
                final String name = delegate.getCurrentName();
                // note: this will also set 'needToHandleName'
                f = _headContext.setFieldName(name);
                if (f == TokenFilter.INCLUDE_ALL) {
                    _itemFilter = f;
                    return (_currToken = t);
                }
                if (f == null) {
                    delegate.nextToken();
                    delegate.skipChildren();
                    break;
                }
                f = f.includeProperty(name);
                if (f == null) {
                    delegate.nextToken();
                    delegate.skipChildren();
                    break;
                }
                _itemFilter = f;
                if (f == TokenFilter.INCLUDE_ALL) {
                    if (_verifyAllowedMatches()) {
                        if (_inclusion == Inclusion.INCLUDE_ALL_AND_PATH) {
                            return (_currToken = t);
                        }
                    } else {
                        delegate.nextToken();
                        delegate.skipChildren();
                    }
                }
                if (_inclusion != Inclusion.ONLY_INCLUDE_ALL) {
                    t = _nextTokenWithBuffering(_headContext);
                    if (t != null) {
                        _currToken = t;
                        return t;
                    }
                }
                break;
            }

        default: // scalar value
            f = _itemFilter;
            if (f == TokenFilter.INCLUDE_ALL) {
                return (_currToken = t);
            }
            if (f != null) {
                f = _headContext.checkValue(f);
                if ((f == TokenFilter.INCLUDE_ALL)
                        || ((f != null) && f.includeValue(delegate))) {
                    if (_verifyAllowedMatches()) {
                        return (_currToken = t);
                    }
                }
            }
            // Otherwise not included (leaves must be explicitly included)
            break;
        }

        // We get here if token was not yet found; offlined handling
        return _nextToken2();
    }

    /**
     * Offlined handling for cases where there was no buffered token to
     * return, and the token read next could not be returned as-is,
     * at least not yet, but where we have not yet established that
     * buffering is needed.
     */
    protected final JsonToken _nextToken2() throws IOException
    {
        main_loop:
        while (true) {
            JsonToken t = delegate.nextToken();
            if (t == null) { // is this even legal?
                _currToken = t;
                return t;
            }
            TokenFilter f;

            switch (t.id()) {
            case ID_START_ARRAY:
                f = _itemFilter;
                if (f == TokenFilter.INCLUDE_ALL) {
                    _headContext = _headContext.createChildArrayContext(f, true);
                    return (_currToken = t);
                }
                if (f == null) { // does this occur?
                    delegate.skipChildren();
                    continue main_loop;
                }
                // Otherwise still iffy, need to check
                f = _headContext.checkValue(f);
                if (f == null) {
                    delegate.skipChildren();
                    continue main_loop;
                }
                if (f != TokenFilter.INCLUDE_ALL) {
                    f = f.filterStartArray();
                }
                _itemFilter = f;
                if (f == TokenFilter.INCLUDE_ALL) {
                    _headContext = _headContext.createChildArrayContext(f, true);
                    return (_currToken = t);
                } else if (f != null && _inclusion == Inclusion.INCLUDE_NON_NULL) {
                    _headContext = _headContext.createChildArrayContext(f, true);
                    return (_currToken = t);
                }
                _headContext = _headContext.createChildArrayContext(f, false);
                // but if we didn't figure it out yet, need to buffer possible events
                if (_inclusion == Inclusion.INCLUDE_ALL_AND_PATH) {
                    t = _nextTokenWithBuffering(_headContext);
                    if (t != null) {
                        _currToken = t;
                        return t;
                    }
                }
                continue main_loop;

            case ID_START_OBJECT:
                f = _itemFilter;
                if (f == TokenFilter.INCLUDE_ALL) {
                    _headContext = _headContext.createChildObjectContext(f, true);
                    return (_currToken = t);
                }
                if (f == null) { // does this occur?
                    delegate.skipChildren();
                    continue main_loop;
                }
                // Otherwise still iffy, need to check
                f = _headContext.checkValue(f);
                if (f == null) {
                    delegate.skipChildren();
                    continue main_loop;
                }
                if (f != TokenFilter.INCLUDE_ALL) {
                    f = f.filterStartObject();
                }
                _itemFilter = f;
                if (f == TokenFilter.INCLUDE_ALL) {
                    _headContext = _headContext.createChildObjectContext(f, true);
                    return (_currToken = t);
                } else if (f != null && _inclusion == Inclusion.INCLUDE_NON_NULL) {
                    _headContext = _headContext.createChildObjectContext(f, true);
                    return (_currToken = t);
                }
                _headContext = _headContext.createChildObjectContext(f, false);
                if (_inclusion == Inclusion.INCLUDE_ALL_AND_PATH) {
                    t = _nextTokenWithBuffering(_headContext);
                    if (t != null) {
                        _currToken = t;
                        return t;
                    }
                }
                continue main_loop;

            case ID_END_ARRAY:
            case ID_END_OBJECT:
                {
                    boolean returnEnd = _headContext.isStartHandled();
                    f = _headContext.getFilter();
                    if ((f != null) && (f != TokenFilter.INCLUDE_ALL)) {
                        f.filterFinishArray();
                    }
                    _headContext = _headContext.getParent();
                    _itemFilter = _headContext.getFilter();
                    if (returnEnd) {
                        return (_currToken = t);
                    }
                }
                continue main_loop;

            case ID_FIELD_NAME:
                {
                    final String name = delegate.getCurrentName();
                    f = _headContext.setFieldName(name);
                    if (f == TokenFilter.INCLUDE_ALL) {
                        _itemFilter = f;
                        return (_currToken = t);
                    }
                    if (f == null) { // filter out the value
                        delegate.nextToken();
                        delegate.skipChildren();
                        continue main_loop;
                    }
                    f = f.includeProperty(name);
                    if (f == null) { // filter out the value
                        delegate.nextToken();
                        delegate.skipChildren();
                        continue main_loop;
                    }
                    _itemFilter = f;
                    if (f == TokenFilter.INCLUDE_ALL) {
                        if (_verifyAllowedMatches() && _inclusion == Inclusion.INCLUDE_ALL_AND_PATH) {
                            return (_currToken = t);
                        }
                        continue main_loop;
                    }
                    if (_inclusion != Inclusion.ONLY_INCLUDE_ALL) {
                        t = _nextTokenWithBuffering(_headContext);
                        if (t != null) {
                            _currToken = t;
                            return t;
                        }
                    }
                }
                continue main_loop;

            default: // scalar value
                f = _itemFilter;
                if (f == TokenFilter.INCLUDE_ALL) {
                    return (_currToken = t);
                }
                if (f != null) {
                    f = _headContext.checkValue(f);
                    if ((f == TokenFilter.INCLUDE_ALL)
                            || ((f != null) && f.includeValue(delegate))) {
                        if (_verifyAllowedMatches()) {
                            return (_currToken = t);
                        }
                    }
                }
                // Otherwise not included (leaves must be explicitly included)
                break;
            }
        }
    }

    /**
     * Method called when a new potentially included context is found.
     */
    protected final JsonToken _nextTokenWithBuffering(final TokenFilterContext buffRoot)
        throws IOException
    {
        main_loop:
        while (true) {
            JsonToken t = delegate.nextToken();
            if (t == null) { // is this even legal?
                return t;
            }
            TokenFilter f;

            // One simplification here: we know for a fact that the item filter is
            // neither null nor 'include all', for most cases; the only exception
            // being FIELD_NAME handling

            switch (t.id()) {
            case ID_START_ARRAY:
                f = _headContext.checkValue(_itemFilter);
                if (f == null) {
                    delegate.skipChildren();
                    continue main_loop;
                }
                if (f != TokenFilter.INCLUDE_ALL) {
                    f = f.filterStartArray();
                }
                _itemFilter = f;
                if (f == TokenFilter.INCLUDE_ALL) {
                    _headContext = _headContext.createChildArrayContext(f, true);
                    return _nextBuffered(buffRoot);
                } else if (f != null && _inclusion == Inclusion.INCLUDE_NON_NULL) {
                    // TODO don't count as match?
                    _headContext = _headContext.createChildArrayContext(f, true);
                    return _nextBuffered(buffRoot);
                }
                _headContext = _headContext.createChildArrayContext(f, false);
                continue main_loop;

            case ID_START_OBJECT:
                f = _itemFilter;
                if (f == TokenFilter.INCLUDE_ALL) {
                    _headContext = _headContext.createChildObjectContext(f, true);
                    return t;
                }
                if (f == null) { // does this occur?
                    delegate.skipChildren();
                    continue main_loop;
                }
                // Otherwise still iffy, need to check
                f = _headContext.checkValue(f);
                if (f == null) {
                    delegate.skipChildren();
                    continue main_loop;
                }
                if (f != TokenFilter.INCLUDE_ALL) {
                    f = f.filterStartObject();
                }
                _itemFilter = f;
                if (f == TokenFilter.INCLUDE_ALL) {
                    _headContext = _headContext.createChildObjectContext(f, true);
                    return _nextBuffered(buffRoot);
                } else if (f != null && _inclusion == Inclusion.INCLUDE_NON_NULL) {
                    // TODO don't count as match?
                    _headContext = _headContext.createChildArrayContext(f, true);
                    return _nextBuffered(buffRoot);
                }
                _headContext = _headContext.createChildObjectContext(f, false);
                continue main_loop;

            case ID_END_ARRAY:
            case ID_END_OBJECT:
                {
                    // Unlike with other loops, here we know that content was NOT
                    // included (won't get this far otherwise)
                    f = _headContext.getFilter();
                    if ((f != null) && (f != TokenFilter.INCLUDE_ALL)) {
                        f.filterFinishArray();
                    }
                    boolean gotEnd = (_headContext == buffRoot);
                    boolean returnEnd = gotEnd && _headContext.isStartHandled();

                    _headContext = _headContext.getParent();
                    _itemFilter = _headContext.getFilter();

                    if (returnEnd) {
                        return t;
                    }
                }
                continue main_loop;

            case ID_FIELD_NAME:
                {
                    final String name = delegate.getCurrentName();
                    f = _headContext.setFieldName(name);
                    if (f == TokenFilter.INCLUDE_ALL) {
                        _itemFilter = f;
                        return _nextBuffered(buffRoot);
                    }
                    if (f == null) { // filter out the value
                        delegate.nextToken();
                        delegate.skipChildren();
                        continue main_loop;
                    }
                    f = f.includeProperty(name);
                    if (f == null) { // filter out the value
                        delegate.nextToken();
                        delegate.skipChildren();
                        continue main_loop;
                    }
                    _itemFilter = f;
                    if (f == TokenFilter.INCLUDE_ALL) {
                        if (_verifyAllowedMatches()) {
                            return _nextBuffered(buffRoot);
                        } else {
                            // edge case: if no more matches allowed, reset filter
                            // to initial state to prevent missing a token in next iteration
                            _itemFilter = _headContext.setFieldName(name);
                        }
                    }
                }
                continue main_loop;

            default: // scalar value
                f = _itemFilter;
                if (f == TokenFilter.INCLUDE_ALL) {
                    return _nextBuffered(buffRoot);
                }
                if (f != null) {
                    f = _headContext.checkValue(f);
                    if ((f == TokenFilter.INCLUDE_ALL)
                            || ((f != null) && f.includeValue(delegate))) {
                        if (_verifyAllowedMatches()) {
                            return _nextBuffered(buffRoot);
                        }
                    }
                }
                // Otherwise not included (leaves must be explicitly included)
                continue main_loop;
            }
        }
    }

    private JsonToken _nextBuffered(TokenFilterContext buffRoot) throws IOException
    {
        _exposedContext = buffRoot;
        TokenFilterContext ctxt = buffRoot;
        JsonToken t = ctxt.nextTokenToRead();
        if (t != null) {
            return t;
        }
        while (true) {
            // all done with buffered stuff?
            if (ctxt == _headContext) {
                throw _constructError("Internal error: failed to locate expected buffered tokens");
                /*
                _exposedContext = null;
                break;
                */
            }
            // If not, traverse down the context chain
            ctxt = _exposedContext.findChildOf(ctxt);
            _exposedContext = ctxt;
            if (ctxt == null) { // should never occur
                throw _constructError("Unexpected problem: chain of filtered context broken");
            }
            t = _exposedContext.nextTokenToRead();
            if (t != null) {
                return t;
            }
        }
    }

    private final boolean _verifyAllowedMatches() throws IOException {
        if (_matchCount == 0 || _allowMultipleMatches) {
            ++_matchCount;
            return true;
        }
        return false;
    }

    @Override
    public JsonToken nextValue() throws IOException {
        // Re-implemented same as ParserMinimalBase:
        JsonToken t = nextToken();
        if (t == JsonToken.FIELD_NAME) {
            t = nextToken();
        }
        return t;
    }

    /**
     * Need to override, re-implement similar to how method defined in
     * {@link com.fasterxml.jackson.core.base.ParserMinimalBase}, to keep
     * state correct here.
     */
    @Override
    public JsonParser skipChildren() throws IOException
    {
        if ((_currToken != JsonToken.START_OBJECT)
            && (_currToken != JsonToken.START_ARRAY)) {
            return this;
        }
        int open = 1;

        // Since proper matching of start/end markers is handled
        // by nextToken(), we'll just count nesting levels here
        while (true) {
            JsonToken t = nextToken();
            if (t == null) { // not ideal but for now, just return
                return this;
            }
            if (t.isStructStart()) {
                ++open;
            } else if (t.isStructEnd()) {
                if (--open == 0) {
                    return this;
                }
            }
        }
    }
    
    /*
    /**********************************************************
    /* Public API, access to token information, text
    /**********************************************************
     */

    @Override public String getText() throws IOException { return delegate.getText();  }
    @Override public boolean hasTextCharacters() { return delegate.hasTextCharacters(); }
    @Override public char[] getTextCharacters() throws IOException { return delegate.getTextCharacters(); }
    @Override public int getTextLength() throws IOException { return delegate.getTextLength(); }
    @Override public int getTextOffset() throws IOException { return delegate.getTextOffset(); }

    /*
    /**********************************************************
    /* Public API, access to token information, numeric
    /**********************************************************
     */
    
    @Override
    public BigInteger getBigIntegerValue() throws IOException { return delegate.getBigIntegerValue(); }

    @Override
    public boolean getBooleanValue() throws IOException { return delegate.getBooleanValue(); }
    
    @Override
    public byte getByteValue() throws IOException { return delegate.getByteValue(); }

    @Override
    public short getShortValue() throws IOException { return delegate.getShortValue(); }

    @Override
    public BigDecimal getDecimalValue() throws IOException { return delegate.getDecimalValue(); }

    @Override
    public double getDoubleValue() throws IOException { return delegate.getDoubleValue(); }

    @Override
    public float getFloatValue() throws IOException { return delegate.getFloatValue(); }

    @Override
    public int getIntValue() throws IOException { return delegate.getIntValue(); }

    @Override
    public long getLongValue() throws IOException { return delegate.getLongValue(); }

    @Override
    public NumberType getNumberType() throws IOException { return delegate.getNumberType(); }

    @Override
    public Number getNumberValue() throws IOException { return delegate.getNumberValue(); }

    /*
    /**********************************************************
    /* Public API, access to token information, coercion/conversion
    /**********************************************************
     */
    
    @Override public int getValueAsInt() throws IOException { return delegate.getValueAsInt(); }
    @Override public int getValueAsInt(int defaultValue) throws IOException { return delegate.getValueAsInt(defaultValue); }
    @Override public long getValueAsLong() throws IOException { return delegate.getValueAsLong(); }
    @Override public long getValueAsLong(long defaultValue) throws IOException { return delegate.getValueAsLong(defaultValue); }
    @Override public double getValueAsDouble() throws IOException { return delegate.getValueAsDouble(); }
    @Override public double getValueAsDouble(double defaultValue) throws IOException { return delegate.getValueAsDouble(defaultValue); }
    @Override public boolean getValueAsBoolean() throws IOException { return delegate.getValueAsBoolean(); }
    @Override public boolean getValueAsBoolean(boolean defaultValue) throws IOException { return delegate.getValueAsBoolean(defaultValue); }
    @Override public String getValueAsString() throws IOException { return delegate.getValueAsString(); }
    @Override public String getValueAsString(String defaultValue) throws IOException { return delegate.getValueAsString(defaultValue); }
    
    /*
    /**********************************************************
    /* Public API, access to token values, other
    /**********************************************************
     */

    @Override public Object getEmbeddedObject() throws IOException { return delegate.getEmbeddedObject(); }
    @Override public byte[] getBinaryValue(Base64Variant b64variant) throws IOException { return delegate.getBinaryValue(b64variant); }
    @Override public int readBinaryValue(Base64Variant b64variant, OutputStream out) throws IOException { return delegate.readBinaryValue(b64variant, out); }
    @Override public JsonLocation getTokenLocation() { return delegate.getTokenLocation(); }

    /*
    /**********************************************************
    /* Internal helper methods
    /**********************************************************
     */

    protected JsonStreamContext _filterContext() {
        if (_exposedContext != null) {
            return _exposedContext;
        }
        return _headContext;
    }
  
}

com/fasterxml/jackson/core/filter/FilteringParserDelegate.java

 

⇒ Download and Install Jackson Binary Package

⇐ What Is Jackson

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library

2016-02-03, 29451👍, 1💬