Java tutorial
/* * Copyright 2006-2014 the original author or authors. * * 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.kordamp.ezmorph.object; import org.apache.commons.lang.builder.EqualsBuilder; import org.apache.commons.lang.builder.HashCodeBuilder; import org.kordamp.ezmorph.MorphException; import java.math.BigDecimal; import java.math.BigInteger; /** * Morphs to a BigDecimal. * * @author Andres Almiray */ public final class BigDecimalMorpher extends AbstractObjectMorpher { private BigDecimal defaultValue; public BigDecimalMorpher() { super(); } /** * @param defaultValue return value if the value to be morphed is null */ public BigDecimalMorpher(BigDecimal defaultValue) { super(true); this.defaultValue = defaultValue; } public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (!(obj instanceof BigDecimalMorpher)) { return false; } BigDecimalMorpher other = (BigDecimalMorpher) obj; EqualsBuilder builder = new EqualsBuilder(); if (isUseDefault() && other.isUseDefault()) { builder.append(getDefaultValue(), other.getDefaultValue()); return builder.isEquals(); } return !isUseDefault() && !other.isUseDefault() && builder.isEquals(); } /** * Returns the default value for this Morpher. */ public BigDecimal getDefaultValue() { return defaultValue; } public int hashCode() { HashCodeBuilder builder = new HashCodeBuilder(); if (isUseDefault()) { builder.append(getDefaultValue()); } return builder.toHashCode(); } public Object morph(Object value) { if (value instanceof BigDecimal) { return value; } if (value == null) { if (isUseDefault()) { return defaultValue; } else { return (BigDecimal) null; } } if (value instanceof Number) { if (value instanceof Float) { Float f = ((Float) value); if (f.isInfinite() || f.isNaN()) { throw new MorphException("BigDecimal can not be infinite or NaN"); } } else if (value instanceof Double) { Double d = ((Double) value); if (d.isInfinite() || d.isNaN()) { throw new MorphException("BigDecimal can not be infinite or NaN"); } } else if (value instanceof BigInteger) { return new BigDecimal((BigInteger) value); } return new BigDecimal(((Number) value).doubleValue()); } else { try { String str = String.valueOf(value).trim(); if (str.length() == 0 || str.equalsIgnoreCase("null")) { return (BigDecimal) null; } else { return new BigDecimal(str); } } catch (NumberFormatException nfe) { if (isUseDefault()) { return defaultValue; } else { throw new MorphException(nfe); } } } } public Class<?> morphsTo() { return BigDecimal.class; } }