Java example source code file (IdentityConstraint.java)

This example Java source code file (IdentityConstraint.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

field, identityconstraint, selector, string, stringlistimpl, xsannotationimpl, xsidcdefinition, xsnamespaceitem, xsobjectlist, xsobjectlistimpl

The IdentityConstraint.java Java example source code

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.impl.xs.identity;

import com.sun.org.apache.xerces.internal.xs.XSIDCDefinition;
import com.sun.org.apache.xerces.internal.xs.StringList;
import com.sun.org.apache.xerces.internal.xs.XSNamespaceItem;
import com.sun.org.apache.xerces.internal.xs.XSObjectList;
import com.sun.org.apache.xerces.internal.xs.XSConstants;
import com.sun.org.apache.xerces.internal.impl.xs.util.StringListImpl;
import com.sun.org.apache.xerces.internal.impl.xs.util.XSObjectListImpl;
import com.sun.org.apache.xerces.internal.impl.xs.XSAnnotationImpl;

/**
 * Base class of Schema identity constraint.
 *
 * @xerces.internal
 *
 * @author Andy Clark, IBM
 */
public abstract class IdentityConstraint implements XSIDCDefinition {

    //
    // Data
    //

    /** type */
    protected short type;

    /** target namespace */
    protected String fNamespace;

    /** Identity constraint name. */
    protected String fIdentityConstraintName;

    /** name of owning element */
    protected String fElementName;

    /** Selector. */
    protected Selector fSelector;

    /** Field count. */
    protected int fFieldCount;

    /** Fields. */
    protected Field[] fFields;

    // optional annotations
    protected XSAnnotationImpl [] fAnnotations = null;

    // number of annotations in this identity constraint
    protected int fNumAnnotations;

    //
    // Constructors
    //

    /** Default constructor. */
    protected IdentityConstraint(String namespace, String identityConstraintName, String elemName) {
        fNamespace = namespace;
        fIdentityConstraintName = identityConstraintName;
        fElementName = elemName;
    } // <init>(String,String)

    //
    // Public methods
    //

    /** Returns the identity constraint name. */
    public String getIdentityConstraintName() {
        return fIdentityConstraintName;
    } // getIdentityConstraintName():String

    /** Sets the selector. */
    public void setSelector(Selector selector) {
        fSelector = selector;
    } // setSelector(Selector)

    /** Returns the selector. */
    public Selector getSelector() {
        return fSelector;
    } // getSelector():Selector

    /** Adds a field. */
    public void addField(Field field) {
        if (fFields == null)
            fFields = new Field[4];
        else if (fFieldCount == fFields.length)
            fFields = resize(fFields, fFieldCount*2);
        fFields[fFieldCount++] = field;
    } // addField(Field)

    /** Returns the field count. */
    public int getFieldCount() {
        return fFieldCount;
    } // getFieldCount():int

    /** Returns the field at the specified index. */
    public Field getFieldAt(int index) {
        return fFields[index];
    } // getFieldAt(int):Field

    // get the name of the owning element
    public String getElementName () {
        return fElementName;
    } // getElementName(): String

    //
    // Object methods
    //

    /** Returns a string representation of this object. */
    public String toString() {
        String s = super.toString();
        int index1 = s.lastIndexOf('$');
        if (index1 != -1) {
            return s.substring(index1 + 1);
        }
        int index2 = s.lastIndexOf('.');
        if (index2 != -1) {
            return s.substring(index2 + 1);
        }
        return s;
    } // toString():String

    // equals:  returns true if and only if the String
    // representations of all members of both objects (except for
    // the elenemtName field) are equal.
    public boolean equals(IdentityConstraint id) {
        boolean areEqual = fIdentityConstraintName.equals(id.fIdentityConstraintName);
        if(!areEqual) return false;
        areEqual = fSelector.toString().equals(id.fSelector.toString());
        if(!areEqual) return false;
        areEqual = (fFieldCount == id.fFieldCount);
        if(!areEqual) return false;
        for(int i=0; i<fFieldCount; i++)
            if(!fFields[i].toString().equals(id.fFields[i].toString())) return false;
        return true;
    } // equals

    static final Field[] resize(Field[] oldArray, int newSize) {
        Field[] newArray = new Field[newSize];
        System.arraycopy(oldArray, 0, newArray, 0, oldArray.length);
        return newArray;
    }

    /**
     * Get the type of the object, i.e ELEMENT_DECLARATION.
     */
    public short getType() {
        return XSConstants.IDENTITY_CONSTRAINT;
    }

    /**
     * The <code>name of this XSObject depending on the
     * <code>XSObject type.
     */
    public String getName() {
        return fIdentityConstraintName;
    }

    /**
     * The namespace URI of this node, or <code>null if it is
     * unspecified.  defines how a namespace URI is attached to schema
     * components.
     */
    public String getNamespace() {
        return fNamespace;
    }

    /**
     * {identity-constraint category} One of key, keyref or unique.
     */
    public short getCategory() {
        return type;
    }

    /**
     * {selector} A restricted XPath ([XPath]) expression
     */
    public String getSelectorStr() {
        return (fSelector != null) ? fSelector.toString() : null;
    }

    /**
     * {fields} A non-empty list of restricted XPath ([XPath]) expressions.
     */
    public StringList getFieldStrs() {
        String[] strs = new String[fFieldCount];
        for (int i = 0; i < fFieldCount; i++)
            strs[i] = fFields[i].toString();
        return new StringListImpl(strs, fFieldCount);
    }

    /**
     * {referenced key} Required if {identity-constraint category} is keyref,
     * forbidden otherwise. An identity-constraint definition with
     * {identity-constraint category} equal to key or unique.
     */
    public XSIDCDefinition getRefKey() {
        return null;
    }

    /**
     * Optional. Annotation.
     */
    public XSObjectList getAnnotations() {
        return new XSObjectListImpl(fAnnotations, fNumAnnotations);
    }

        /**
         * @see com.sun.org.apache.xerces.internal.xs.XSObject#getNamespaceItem()
         */
        public XSNamespaceItem getNamespaceItem() {
        // REVISIT: implement
                return null;
        }

    public void addAnnotation(XSAnnotationImpl annotation) {
        if(annotation == null)
            return;
        if(fAnnotations == null) {
            fAnnotations = new XSAnnotationImpl[2];
        } else if(fNumAnnotations == fAnnotations.length) {
            XSAnnotationImpl[] newArray = new XSAnnotationImpl[fNumAnnotations << 1];
            System.arraycopy(fAnnotations, 0, newArray, 0, fNumAnnotations);
            fAnnotations = newArray;
        }
        fAnnotations[fNumAnnotations++] = annotation;
    }

} // class IdentityConstraint