/**
 * Copyright 2010 JBoss Inc
 *
 * 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 org.drools.ide.common.client.modeldriven.brl;

/**
 * This represents a constraint on a fact - involving a SINGLE FIELD.
 * 
 * Can also include optional "connective constraints" that extend the options for matches.
 * @author Michael Neale
 */
public class SingleFieldConstraint extends BaseSingleFieldConstraint implements FieldConstraint {

    private String fieldBinding;
    private String fieldName;
    private String operator;
    private String fieldType;
    private FieldConstraint parent;
    /**
     * Used instead of "value" when constraintValueType = TYPE_EXPR_BUILDER.
     * Esteban Aliverti
     */
    private ExpressionFormLine expression = new ExpressionFormLine();
    /**
     * Used with "value" when using custom forms.
     * Esteban Aliverti
     */
    private String id;
    public ConnectiveConstraint[] connectives;

    public SingleFieldConstraint(final String field, final String fieldType, final FieldConstraint parent) {
        this.setFieldName(field);
        this.setFieldType(fieldType);
        this.setParent(parent);
    }

    public SingleFieldConstraint(final String field) {
        this.setFieldName(field);
        this.setFieldType("");
        this.setParent(null);
    }

    public SingleFieldConstraint() {
        this.setFieldName(null);
        this.setFieldType("");
        this.setParent(null);
    }

    public void setFieldBinding(String fieldBinding) {
        this.fieldBinding = fieldBinding;
    }

    public String getFieldBinding() {
        return fieldBinding;
    }

    /**
     * This adds a new connective.
     *
     */
    public void addNewConnective() {
        if (this.connectives == null) {
            this.connectives = new ConnectiveConstraint[]{new ConnectiveConstraint(this.getFieldName(), this.getFieldType(), null, null)};
        } else {
            final ConnectiveConstraint[] newList = new ConnectiveConstraint[this.connectives.length + 1];
            for (int i = 0; i < this.connectives.length; i++) {
                newList[i] = this.connectives[i];
            }
            newList[this.connectives.length] = new ConnectiveConstraint(this.getFieldName(), this.getFieldType(), null, null);
            this.connectives = newList;
        }
    }

    /**
     * Returns true of there is a field binding.
     */
    public boolean isBound() {
        return this.getFieldBinding() != null && this.getFieldBinding().length() > 0;
    }

    public ExpressionFormLine getExpressionValue() {
        return expression;
    }

    public void setExpressionValue(ExpressionFormLine expression) {
        this.expression = expression;
    }

    public void setFieldName(String fieldName) {
        this.fieldName = fieldName;
    }

    public String getFieldName() {
        return fieldName;
    }

    public void setOperator(String operator) {
        this.operator = operator;
    }

    public String getOperator() {
        return operator;
    }

    public void setFieldType(String fieldType) {
        this.fieldType = fieldType;
    }

    public String getFieldType() {
        return fieldType;
    }

    public void setParent(FieldConstraint parent) {
        this.parent = parent;
    }

    public FieldConstraint getParent() {
        return parent;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

}