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XML Schema Object Model (XSOM) is a Java library that allows applications to easily parse XML Schema documents and inspect information in them. It is expected to be useful for applications that need to take XML Schema as an input.

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/*
 * Copyright (c) 1997, 2022 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.xsom.impl;

import com.sun.xml.xsom.XSAttGroupDecl;
import com.sun.xml.xsom.XSAttributeUse;
import com.sun.xml.xsom.impl.parser.SchemaDocumentImpl;
import com.sun.xml.xsom.impl.scd.Iterators;
import com.sun.xml.xsom.impl.Ref.AttGroup;
import org.xml.sax.Locator;

import java.util.AbstractSet;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.LinkedHashMap;

public abstract class AttributesHolder extends DeclarationImpl {

    protected AttributesHolder( SchemaDocumentImpl _parent, AnnotationImpl _annon,
                                Locator loc, ForeignAttributesImpl _fa, String _name, boolean _anonymous ) {

        super(_parent,_annon,loc,_fa,_parent.getTargetNamespace(),_name,_anonymous);
    }

    /** set the local wildcard. */
    public abstract void setWildcard(WildcardImpl wc);

    /**
     * Local attribute use.
     * Use linked hash map to guarantee the iteration order, and make it close to
     * what was in the schema document.
     */
    protected final Map attributes = new LinkedHashMap<>();
    public void addAttributeUse( UName name, AttributeUseImpl a ) {
        attributes.put( name, a );
    }
    /** prohibited attributes. */
    protected final Set prohibitedAtts = new HashSet<>();
    public void addProhibitedAttribute( UName name ) {
        prohibitedAtts.add(name);
    }

    /**
     * Returns the attribute uses by looking at attribute groups and etc.
     * Searching for the base type is done in {@link ComplexTypeImpl}.
     */
    public Collection getAttributeUses() {
        // TODO: this is fairly inefficient
        List v = new ArrayList<>(attributes.values());
        for( XSAttGroupDecl agd : getAttGroups() )
            v.addAll(agd.getAttributeUses());
        return v;
    }
    public Iterator iterateAttributeUses() {
        return getAttributeUses().iterator();
    }



    public XSAttributeUse getDeclaredAttributeUse( String nsURI, String localName ) {
        return attributes.get(new UName(nsURI,localName));
    }

    public Iterator iterateDeclaredAttributeUses() {
        return attributes.values().iterator();
    }

    public Collection getDeclaredAttributeUses() {
        return attributes.values();
    }


    /** {@link Ref.AttGroup}s that are directly refered from this. */
    protected final Set attGroups = new HashSet<>();

    public void addAttGroup( Ref.AttGroup a ) { attGroups.add(a); }

    // Iterates all AttGroups which are directly referenced from this component
    // this does not iterate att groups referenced from the base type
    public Iterator iterateAttGroups() {
        return new Iterators.Adapter<>(attGroups.iterator()) {
            protected XSAttGroupDecl filter(AttGroup u) {
                return u.get();
            }
        };
    }

    public Set getAttGroups() {
        return new AbstractSet<>() {
            public Iterator iterator() {
                return iterateAttGroups();
            }

            public int size() {
                return attGroups.size();
            }
        };
    }
}